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voda 30 maart 2023 10:27

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British Steel to Supply Profiles for Bull Wheels in Alps

British Steel's Special Profiles business has received a new order for bull wheel profiles that will be used to manufacture bull wheels for ski-lift systems in the Alps. Bull wheels are large wheels that are typically between 3.6m and 7.3m in diameter and are used to feed and brake the steel rope that drives the ski-lifts. The bull wheel profiles are rolled in Skinningrove and are then supplied to a French fabricator, where they are bent into the required shape before being welded onto the final bull wheel structure.

The bull wheel profiles were developed by British Steel's Special Profiles business in 2017 to replace the previous method of welding together channel sections using heavy plate strips, which was time-consuming and expensive. The new bespoke profile has proved to be more efficient and cost-effective for customers, allowing for smaller rolling quantities and highly-specialised custom steel sections.

The use of bull wheels in ski-lift systems is vital for the safe operation of ski-lifts. The bull wheel acts as a feed and braking system for the steel rope that drives the ski-lift, ensuring that skiers are transported up and down the slopes safely and efficiently. The bespoke bull wheel profiles developed by British Steel's Special Profiles business are designed to provide the required strength and durability for this demanding application, helping skiers make the most of their time on the slopes.

A bull wheel is a large diameter wheel with a groove around its circumference that is used to support and guide a cable or rope, typically in ski-lift systems. The cable or rope is wound around the bull wheel, and its rotation allows the lift to move up or down the mountain. The bull wheel is an essential component of the lift, and its design is critical to ensuring the lift operates safely and efficiently.

voda 30 maart 2023 10:27

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Gerdau’s Whitby Ontario Mill to Shut for Upgrading

US’s leading long steel products manufacturer Gerdau has announced that it will temporarily halt melt shop production at its Whitby, Ontario mill, which has an annual production capacity of 1.05 short tons. The shutdown is expected to begin in late April and will enable the company to enhance the quality and production capacity of its electric arc furnace. The Whitby mill specializes in the production of long products such as channels, angles, flats, reinforcing bars, and structural products.

Before the melt shop work, the rolling operations at the mill will go offline for two weeks of maintenance. According to data from the Association for Iron and Steel Technology, the Whitby mill has 661,000 short tons per year of structural rolling capacity and 551,000 short tons per year of bar rolling capacity.

To prevent customer disruptions during the shutdown, other Gerdau mills will compensate for the lost production at the Whitby mill. Gerdau is a multinational company that specializes in the production of long steel products and is headquartered in Porto Alegre, Brazil. It has operations in 10 countries, including the United States, Canada, and Brazil. The company's portfolio includes a wide range of long steel products, including rebar, wire rod, billets, and special steel products.

Gerdau's North American operations include 14 steel mills, including the Whitby mill, and two downstream facilities. Its North American operations specialize in the production of long steel products, serving a diverse range of industries, including construction, energy, manufacturing, and automotive.

voda 30 maart 2023 10:27

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Nucor Selects Primetals for New Galvanizing Line at Berkeley

Nucor Steel Berkeley, a sheet mill division of Nucor Corporation, has placed an order with Primetals Technologies for a new, advanced automotive-grade continuous galvanizing line at its facility located in Huger, South Carolina. The new CGL will increase the company's annual galvanized production capacity to approximately 500,000 short tons and enable it to produce advanced high-strength steel and other automotive products.

The implementation of the new CGL supports Nucor Corporation's strategy to shift its product mix towards higher-margin value-added items. Nucor Steel Berkeley expects to produce the first coil by mid-2025.

Primetals Technologies will be responsible for engineering and supplying a vertical galvanizing furnace with galvanneal capability, afterpot cooling, and quench technology. The company has also partnered with Clecim, a leading heavy industry manufacturer, for the supply of key mechanical scope, including terminal equipment and special products. In addition, a complete automation package, including drives, furnace model, and advanced scheduling, as well as power solutions, including a new incoming substation, will be supplied.

Nucor Steel Berkeley has an annual production capacity of approximately 2.5 million short tons of hot-rolled sheet steel. The facility's hot mill can process coils up to 72 inches wide and up to 5/8 inch thick. Nucor Steel Berkeley also has a cold mill that can produce up to 1.2 million short tons of cold-rolled sheet steel annually, with coils up to 72 inches wide and up to 0.1875 inch thick. The facility is located in Huger, South Carolina

voda 30 maart 2023 10:28

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Lhaki Steel to Supply Rebars to Project Dantak in Bhutan

Lhaki Steel & Rolling Private Ltd, a leading steel manufacturer in Bhutan, has signed a Memorandum of Understanding with Project Dantak, a major infrastructure development agency in Bhutan, to supply rebars for construction projects in the country. The MoU was signed on March 29, 2023, by the officiating Chief Engineer of Project Dantak, Col Prerit Rawat, and Karma Dorji of Lhaki Steel.

Lhaki Steel is a privately-owned company that was established in 2010 with the aim of producing high-quality steel products for the domestic and international markets. The company operates a modern steel rolling mill in Pasakha, Bhutan, with a production capacity of 120,000 metric tons per year.

In addition to Lhaki Steel, there are other steelmakers in Bhutan, such as Bhutan Steel Industries, which was established in 2016 and rebars.
Project Dantak, on the other hand, is a joint initiative of the Royal

Government of Bhutan and the Government of India, aimed at developing the infrastructure and economy of Bhutan. The agency has been active in Bhutan since 1961 and has been involved in the construction of roads, bridges, tunnels, airports, and other infrastructure projects across the country. While it is not clear whether Project Dantak is also buying steel from India, the agency has been known to source construction materials and equipment from various countries, depending on the nature and scale of the project.

voda 30 maart 2023 10:28

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Hoa Phat to restart Dung Quat blast furnace

Vietnam’s Hoa Phat Group, one of the leading steel manufacturers in the country, has announced that it will restart the banked No. 3 blast furnace at its Dung Quat plant in early April. The confirmation was made during Kallanish's tour of the plant on Wednesday. The furnace is one of four at the plant, each with a capacity of 1 million tonnes per year. Currently, two blast furnaces are in production, while two are banked, and the restart of the third furnace could potentially leave only one furnace banked. Hoa Phat had to idle two blast furnaces in late 2022 due to weak market demand. Vietnam's steel industry has been constrained by a tight credit environment, a crackdown on corruption, and high real estate prices.

Hoa Phat sources have also revealed that the three longs rolling lines at the plant are currently out of operation but are expected to resume operation soon after the completion of maintenance work. However, this information could not be confirmed by other sources at the plant.

The company's HRC mill, which thin-casts slabs with thicknesses of around 70-90mm and feeds them directly into the hot strip mill, is not operating at full capacity. This means that the sale of merchant slab does not make sense for the plant.

The Dung Quat plant has a crude steel capacity of 5.6 million tonnes per year, HRC capacity of 3.5 million tonnes per year, and 2.6 million tonnes per year of construction longs capacity.

While Hoa Phat's decision to restart the banked furnace is expected to increase steel output, it is unclear where the additional output will be sold, given that the HRC markets in the region are already well supplied, and new regional HRC mills, such as the one at Eastern Steel in Malaysia, are coming on-stream this year. Some of the increased HRC output will likely have to be exported, as the domestic markets are becoming saturated.

Despite these challenges, Hoa Phat remains one of the top steelmakers in Vietnam, with a wide range of products and services that include steel pipes, galvanized steel, color-coated steel, and more.
Other top steelmakers in Vietnam include Formosa Ha Tinh Steel Corp, which operates one of the largest steel plants in Southeast Asia, and Hoa Sen Group, which specializes in the production of coated steel sheets and is known for its high-quality products and competitive pricing.

voda 30 maart 2023 10:30

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JSW Steel Emerges as Preferred Bidder for 3 Coal Mines

JSW Steel has been announced as the "Preferred Bidder" for three coal mines in the states of Chattisgarh and Jharkhand, India, in an auction held by the Ministry of Coal of the Government of India.

The three coal mines for which JSW Steel has been declared the preferred bidder are Sitanala Coking Coal Block in Jharia Coalfield, Jharkhand, with projected coal resources of 109 million metric tons; Parbatpur Central Coking Coal Block in Jharia Coalfield, Jharkhand, with projected coal resources of 236 million metric tons; and Banai & Bhalumuda Coal Block in Mand-Raigarh Coalfield, Chattisgarh, with projected coal resources of 1376 million metric tons .

JSW Steel's highest final offer price for becoming the "Preferred Bidder" for these coal mines ranges from 5% to 43% of the average monthly prices of coal published by the Ministry of Coal as the National Coal Index (NCI).
The company will now take all necessary steps to obtain the Letter of Intent, all statutory clearances, execute the Coal Mine Development and Production Agreement (CMDPA), and commence mining operations as per the tender document.

voda 30 maart 2023 10:30

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SMS group produces widest and thickest slab to date from continuous caster at Nucor’s Brandenburg Plate Mill

SMS Group's single-strand slab caster, one of the world's largest casters, is continuing its successful production ramp-up at Nucor Steel Brandenburg in Kentucky, USA. The caster, designed for an annual capacity of 1.6 million short tons, is a key element of the production chain for the new plate mill in Brandenburg. The mill, which is one of the few in the US capable of manufacturing the heavy gauge plate used in monopile foundations for offshore wind towers, will be able to produce 97% of plate products consumed domestically.

The caster is used to cast slabs ranging from 8 to 12 inches thick and 60 to 124 inches wide, with slab lengths varying from 104 to 600 inches. The new vertical-bending caster incorporates various special technological features, such as robot applications on the casting platform, Liquid Core Reduction and quenches cooling in segment 0, Tiltable Foot Rollers, HD moldFO with optical fibers and electromagnetic stirring. In addition, a customer-specific strand guide system, a quenching unit, and a secondary cutting unit are integrated. Various X-Pact technology packages such as X-Pact Process Guidance, X-Pact Solid Control, X-Pact Tech Assist with Liquid Core Reduction, and Dynamic Soft Reduction are integrated into the electrical and automation systems of SMS, supporting the performance of the caster.

Nucor Steel Brandenburg is a steel mill located in Brandenburg, Kentucky, USA. The mill specializes in producing heavy gauge plate used in monopile foundations for offshore wind towers. With an annual capacity of 1.2 million short tons, the mill is one of the few in the United States capable of manufacturing at scale the heavy gauge plate required for offshore wind energy projects.

voda 30 maart 2023 10:31

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Spain’s CELSA developing Al to increase effectiveness of EAFs

CELSA Group, a Spain-based long steel producer, has announced that it is developing artificial intelligence systems to optimize its production processes. The incorporation of AI is expected to increase the efficiency of CELSA's electric arc furnaces, improve the quality of the finished product, and reduce energy consumption.

The AI system that will be developed for CELSA will use big data, machine learning, and predictive analytics to optimize production processes. By analyzing real-time data, the AI system will enable CELSA to make data-driven decisions to improve efficiency and quality.

The project, called Alchimia, will extend to all of CELSA's production centers, starting with those in France and Poland. To implement the project, CELSA will invest €3 million, with 70% of the investment financed by the European Union. The aim of the project is to reduce energy consumption by 2%, increase the circularity ratio of scrap by five percent, and reduce carbon emissions by 232,000 metric tons annually.
CELSA is one of the leading long steel producers in Europe, with operations in various countries, including Spain, France, Poland, the United Kingdom, Norway, and Finland. The company produces a wide range of long steel products, including rebar, wire rod, merchant bars, and structural sections.

voda 30 maart 2023 10:31

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Nippon Steel to Split Nippon Steel Engineering

Nippon Steel and its wholly-owned subsidiary, Nippon Steel Engineering, have announced a Memorandum of Understanding regarding the transfer of a part of the steel plant business of NSE to NSC by means of a company split. The purpose of this company split is to optimize the allocation of management resources among the Nippon Steel group to further promote the development of innovative process technologies and the introduction of equipment to support NSC’s carbon neutrality and the manufacture of high-value-added products.

NSE provides high-quality, environmentally conscious, and energy-saving steel plant equipment worldwide by utilizing its wealth of knowledge, technologies, and achievements accumulated over more than half a century. The Company Split will allow NSC to take over the business conducted by NSE’s Plant & Machinery Sector (excluding business, etc. related to the coke dry quenching (CDQ) system conducted by the Plant & Machinery Business Department).

The schedule of the Company Split includes the date of decision to conclude the MOU, which was March 29, 2023, and the date of conclusion of the MOU, which was also March 29, 2023. The planned date for the decision to conclude the company split agreement is early August 2023, while the planned date for the conclusion of the company split agreement is also early August 2023. The scheduled date of closing, which is the effective date of the company split, is October 1, 2023.

voda 30 maart 2023 10:31

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CBS Showcases Danieli’s Q-ONE EAF Process

Danieli, a global leader in equipment, plants, and services for the metals industry, has announced the release of its latest video showcasing Q-ONE as the game-changing protagonist in the steel industry's pursuit of sustainability. The video, produced in collaboration with major American media company CBS, explains how Q-ONE works and the significant improvements it offers to steel production. Available on TBD and CBS channels starting March 28, the video features interviews with Danieli experts and valuable insights into how innovation is part of the company's DNA, providing value to customers.

The steel industry has faced increasing pressure to reduce its carbon footprint and become more environmentally sustainable, and Danieli is tackling this challenge head-on with its focus on innovation and technology. Q-ONE, one of the company's most significant innovations, is a digital power feeder that enables steel producers to optimize their operations, increase efficiency, and reduce costs. The technology uses advanced digital power electronics to provide precise control and a smooth melting process, enabling customers to make informed decisions and quickly respond to changes in the process.

Not only is Q-ONE an efficient solution, but it is also designed to be compatible with renewable energy sources such as wind or solar power. This makes it a sustainable and environmentally friendly solution for steelmaking, which is essential for the industry's future.

Danieli's Q-ONE technology has set the standard for sustainable practices in the steel industry and is just one example of how the company is driving positive change. With a commitment to innovation and technology, Danieli is leading the way in the pursuit of sustainable solutions for the metals industry.

voda 30 maart 2023 10:32

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JPL Raigarh Ship Stacker Reclaimer to Angul Plant

Jindal Steel and Power’s machinery division, which is responsible for manufacturing and supplying heavy engineering equipment, has recently carried out the first dispatch of a 3600 & 2400 metric tons per hour stacker reclaimer. The stacker reclaimer will be used by Jindal Steel Odisha Angul for iron ore handlincxg downstream processes.

The stacker reclaimer is a critical piece of equipment used in the handling and storage of bulk materials such as iron ore, coal, and limestone. It is used to stack and recover the bulk material, allowing for the smooth and continuous operation of downstream processes such as crushers, conveyors, and other equipment.

JSPL's machinery division has a proven track record of delivering high-quality, reliable heavy engineering equipment to customers across a range of industries. With state-of-the-art manufacturing facilities and a team of experienced engineers and technicians, the division is well-equipped to meet the growing demand for heavy engineering equipment in India and around the world.

voda 30 maart 2023 10:32

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Mr. Brian Pratt Resigns from Algoma Steel Board

Algoma Steel, a leading Canadian producer of hot and cold rolled steel sheet and plate products, headquartered in Sault Ste Marie, Ontario, announced that Mr. Brian Pratt has resigned from the Board of Directors for personal reasons, effective immediately. Mr. Pratt joined the Board of Directors in 2021 and had been a valuable member of the Operations and Capital Projects Committee and Human Resources and Compensation Committee.

Algoma Steel has a long-standing history of producing high-quality steel products and has been a significant player in Canada's steel industry for over 110 years. The company operates two primary facilities, including a fully integrated steelmaking plant in Sault Ste. Marie and a hot strip mill in nearby Brampton in Ontario. Algoma Steel's products are used in a wide range of industries, including automotive, construction, energy, and manufacturing.

Other prominent steel mills in Canada include ArcelorMittal Dofasco, Stelco, and EVRAZ North America.

voda 30 maart 2023 10:32

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US Fixes AD Duty Margin for Circular Welded Pipes from Thailand

The US Department of Commerce has released the preliminary results of its administrative review of the antidumping duty order on circular welded carbon steel pipe from Thailand. According to the report, Thai Premium Pipe was found to have made sales of the subject products at less than normal value during the review period, which ran from March 1, 2021, to February 28, 2022.

As a result of this determination, the DOC has assigned a weighted-average dumping margin of 0.71% to Thai Premium Pipe. The company will be required to pay this margin on all of its exports of circular welded carbon steel pipe to the United States. This duty is meant to offset the unfair advantage that the company gained by selling the products at less than fair market value.

The antidumping duty order on circular welded carbon steel pipe from Thailand was issued in 2016, after an investigation found that the imports of the product were being sold in the United States at less than fair value. The order was put in place to protect US producers of circular welded carbon steel pipe from unfair competition.

Circular welded carbon steel pipe is commonly used in a variety of industries, including construction, automotive, and oil and gas. The United States is a major importer of the product, with imports from Thailand totaling over $20 million in 2020.

voda 30 maart 2023 10:33

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Xinyu Steel Chooses KOCKS RSB® for New SBQ Bar Mill

Baowu’s special steel producer Xinyu Iron & Steel has signed a contract with Friedrich KOCKS for the supply of a Reducing & Sizing Block (RSB®) 370++/4 in 5.0 design. The RSB® will be a part of XISCO's new rolling mill complex in Xinyu City, China, which will produce straight bars with a finished size range of Ø 20.00 to 90.00 mm with the highest dimensional tolerance onto the cooling bed. The commissioning of the RSB® is scheduled for the end of 2023.

The KOCKS 3-roll RSB® will be located as a finishing block after 22 stands in an H/V arrangement in a 560,000 metric ton per annum SBQ mill and has been designed according to the individual requirements of XISCO. The scope of supply also includes remote control for stand and guide adjustments, the equipment for the roll-shop, and KOCKS proprietary software solutions.

The new RSB® 370++/4 will help XISCO achieve a balance between the highest possible quality and best economic results in its rolling mill complex. With its specialized capabilities, the RSB® will play a crucial role in ensuring that XISCO's new rolling mill can produce high-quality steel products that meet the demands of its customers.

KOCKS 3-roll RSB® stands for Reducing & Sizing Block, which is a type of rolling mill equipment used in the production of high-quality steel bars and wire rods. The RSB® is designed to produce finished products with high dimensional accuracy, surface quality, and mechanical properties. It achieves this by using a 3-roll system to reduce the size of the incoming steel billet or bloom and then to shape and size it into the desired finished product. The KOCKS RSB® is known for its high efficiency, reliability, and flexibility, and it is used by steel manufacturers around the world.

XISCO is a subsidiary of Baowu. With over 32,000 employees, XISCO accounts for 10 million metric tons of specialty steels per year and is the industrial backbone of Jiangxi Province.

Friedrich KOCKS GmbH is a German company specializing in the design and production of machinery and equipment for the steel and non-ferrous metal industry. The company was founded in 1909 and has since then been known for its innovative and high-quality products. Friedrich KOCKS offers a range of products including 3-roll Reducing and Sizing Blocks (RSB®), precision sizing stands, and other rolling mill equipment. Its products are used in the production of high-quality steel and non-ferrous metals, and are widely used by major steel and metal manufacturers worldwide. The company is headquartered in Hilden, Germany, and has subsidiaries in the United States, China, and India.

voda 30 maart 2023 10:34

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KÜBLER Joins EUROMETAL as Member

KÜBLER GmbH, a Germany-based company specializing in automation and heating technologies, has announced that it has joined EUROMETAL as an associate member. By joining EUROMETAL, KÜBLER aims to strengthen its position in the European steel market and expand its network within the industry.

KÜBLER is a company based in Ludwigshafen, Germany, that specializes in automation and heating technologies. The company was founded in 1989 and has since grown to become a leading provider of innovative solutions for industrial heating and process heat technology.

KÜBLER's product line includes a wide range of electric heaters, temperature sensors, and control systems, as well as customized heating solutions for various industries. They offer solutions for applications such as surface heating, immersion heating, flow heating, and infrared heating.

The company also offers automation solutions for industrial processes, including PLC programming, visualization systems, and process control systems. KÜBLER's automation products are designed to increase efficiency, reduce costs, and improve overall productivity in industrial settings. KÜBLER has over 130 employees and generates around €14 million in sales. The company operates in several countries, including Austria, Switzerland, the Czech Republic, and Hungary.

EUROMETAL is a European trade organization for steel distribution, steel service centers, and steel traders, representing over 1,000 companies across Europe. The organization works to promote and support the interests of the steel industry and its stakeholders.

voda 30 maart 2023 10:34

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USDOC Postpones CVD Ruling on China's Tin Mill Products

The US Commerce Department has delayed the preliminary ruling of a countervailing duty investigation on tin mill products from China. The investigation, which began on February 7, 2023, was originally expected to have a preliminary ruling within 65 days, by April 13, 2023. However, the USDOC may extend the deadline to 130 days if the case is particularly complex and requires additional time for determination. As a result, the new deadline for the preliminary ruling on the CVD investigation is now set for June 20, 2023. This decision could potentially impact Chinese producers who export tin mill products to the US

In the case of the CVD investigation on tin mill products from China, the US Commerce Department would have been investigating whether Chinese producers of these products were receiving subsidies from the Chinese government, and if so, whether those subsidies were causing injury to the US tin mill products industry.

A countervailing duty is a trade remedy imposed by a country in response to another country's subsidization of its exports. A CVD investigation is conducted by the importing country's government to determine whether the goods imported from the exporting country are benefiting from subsidies, and if so, whether those subsidies are causing injury to the domestic industry of the importing country.

The United States has a significant demand for tinplate products, which are used for a variety of applications such as food and beverage containers, aerosol cans, and household appliances. Domestic players in the US tinplate industry include companies such as ArcelorMittal USA, US Steel, and California Steel Industries. In addition to these large players, there are also a number of smaller companies that specialize in producing tinplate and other steel products for niche markets. The demand for tinplate in the US is primarily met through imports, with China being one of the major sources of such imports.

voda 30 maart 2023 10:34

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M. Sandmeyer to Retire from Sandmeyer Steel

Philadelphia-based Sandmeyer Steel has announced that its Executive Vice President Mr. Rodney C Sandmeyer will retire, effective March 31, 2023, after 38 years with the company. After retirement, Sandmeyer will continue to serve as an active member of the company's board.

Mr. Sandmeyer joined the family owned and managed company in 1985 as the manager of inside sales, after working for Merrill Lynch for six years. He later moved to the operations side of the business, serving as Vice President of Operations, and then Executive Vice President.

Sandmeyer Steel was founded in 1952 by German immigrant and mechanical engineer Paul Sandmeyer as a small metal fabrication and welding shop. Today, Sandmeyer Steel Company is a leading supplier of corrosion-resistant metals with a global customer base across various industries such as chemical processing, food processing, and aerospace.
The company's product line includes a wide range of plate products, including stainless steel, nickel alloy, titanium, duplex stainless steel, and clad plates. Sandmeyer Steel Company offers custom sizes and shapes, and various processing services such as plasma cutting, waterjet cutting, and precision sawing.

voda 30 maart 2023 10:35

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US confirms China’s Ningbo Dongxin as China-wide entity regarding AD case on threaded rods

The US Department of Commerce has determined that Ningbo Dongxin High-Strength Nut is not eligible for a separate rate and is, thus, part of the China-wide entity, according to the final result of the anti-dumping duty administrative review. Ningbo Dongxin is the sole mandatory respondent subject to the administrative review of alloy and certain carbon steel threaded rod. The administrative review period covers April 1, 2021, to March 31, 2022.
As a result, the US DOC will instruct US Customs and Border Protection to apply the China-wide entity rate of 48.91% to all goods exported by Ningbo Dongxin during the review period. The USDOC intends to issue instructions to CBP no earlier than 35 days after the publication of these final results.

voda 30 maart 2023 10:35

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NSK Increases Dynamic Load Rating of NSK Rolling Bearings

NSK Ltd. has announced that it has developed the world's first method for accurately predicting the life of a rolling bearing based on statistical data of non-metallic inclusions in the steel. This breakthrough technology has enabled NSK to revise up the basic dynamic load rating of its bearings and will allow customers to design machines and vehicles that can take full advantage of the long-life performance of high-quality NSK bearings.

The new method, which is based on advanced detection and analysis of non-metallic inclusions in the steel, uses NSK's unique Micro Ultrasonic Testing Method (Micro-UT Method) to inspect a volume of steel 3,000 times larger in one-fifth of the time compared to conventional methods. This allows efficient collection and analysis of highly reliable statistical data on non-metallic inclusions in bearing steel.
To derive a bearing life calculation method based on the analysis of non-metallic inclusions, NSK developed a unique rotational testing method that involves introducing artificial defects simulating non-metallic inclusions of various sizes into rolling bearing raceways. Through this process, NSK was able to reproduce specific modes of failure and created a simulation capable of reproducing and analyzing the stresses around the artificial defects to clarify the mechanism of flaking fatigue.

This breakthrough technology will enable highly accurate bearing life prediction, which can be used to revise up the basic dynamic load rating of bearings, a vital parameter used in application life calculation. For radial roller bearings, it is possible to revise up the basic dynamic load rating to double the equivalent rolling contact fatigue life.

The revised basic dynamic load ratings open up new possibilities for customers who want to capitalize on the long-life performance of NSK bearings in their machine design. This is expected to help customers reduce the frequency of component replacement and machine maintenance, and potentially downsize machine and unit designs, thereby contributing to the realization of a carbon-neutral society.

NSK will initially propose solutions based on this technology to select customers, followed by a broad revision of the basic dynamic load rating of its standard bearing lineup. NSK bearings are made of high-quality steel, which has been constantly improved by NSK researchers and engineers closely collaborating with steel manufacturers. As a result, the actual life of NSK bearings tends to be considerably longer than bearing life calculated in accordance with ISO standards.

This new technology is a significant milestone for NSK, as it will enable the company to provide customers with a higher level of precision and reliability when it comes to predicting the life of its bearings. NSK's commitment to innovation and technological advancement has once again been demonstrated with this breakthrough, and it is expected to have a significant impact on the future of machine and vehicle design.

voda 30 maart 2023 10:36

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Sophia University Researchers Reveal Nature of Fractures by Hydrogen

Hydrogen embrittlement weakens the material, making it more likely to fail under mechanical stress, and is a major challenge for the hydrogen automobile industry. High-strength steels have a higher weight-to-strength ratio, making them ideal materials for lightweight vehicles, but their exposure to hydrogen negatively affects their mechanical properties.

Scientists have discovered a way to study intergranular fractures caused by hydrogen embrittlement in high-strength steel. A research team from Sophia University, Japan, led by Professor Kenichi Takai, has developed a new mechanical test that allows for the study of intergranular (IG) fractures in high-strength (HS) steel caused by hydrogen embrittlement. Hydrogen embrittlement occurs when hydrogen atoms diffuse into the material's lattice structure, weakening it and making it more susceptible to failure under mechanical stress. IG fractures, which occur along the grain boundaries of the crystalline lattice, are particularly difficult to study in isolation due to other types of fracture that tend to occur alongside them.

The team's innovative mechanical test involves repeated loading and unloading of the HS steel sample during hydrogen charging. This test progressively reduces the material's ultimate tensile strength (UTS) and produces almost-pure IG fractures. The researchers believe that this occurs because hydrogen atoms are given enough time to fill up new cracks generated in the material, allowing the fracture to advance exclusively along the grain boundaries.

To gain insight into the lattice defects present below the fracture, the team used lower-temperature thermal desorption spectroscopy (L-TDS). This technique involves observing the rate of desorption of a gas (hydrogen) from the material at different temperatures, providing information about the number and types of defects present in it. The researchers were able to distinguish hydrogen trapping sites on the atomic scale, providing important clues to understand and potentially suppress hydrogen embrittlement in HS steel.

Further analyses of scanning electron microscopy (SEM) images showed that local plastic deformation occurs right below the IG fracture caused by hydrogen embrittlement. The findings of this study will help materials scientists understand hydrogen embrittlement in HS steel better, paving the way for new methods to suppress it and enabling the safe use of HS steel in hydrogen-powered vehicles.

To investigate this issue, researchers, including Professor Kenichi Takai from Sophia University in Japan, devised a load reduction test to produce pure intergranular fractures in embrittled high-strength steel samples. They also used thermal desorption spectroscopy to study lattice defects below the fracture surface.

The study's findings could aid in the development of methods to suppress hydrogen embrittlement and enable the safe use of high-strength steel in hydrogen-powered vehicles. The research was supported by the Japan Society for the Promotion of Science, New Energy and Industrial Technology Development Organization, and The Iron and Steel Institute of Japan.

Sophia University, established in 1913 in Tokyo, is a prestigious Jesuit-affiliated university that offers education in various fields, including engineering and applied sciences.

Kenichi Takai is an accomplished researcher with a strong background in materials science and engineering. Prior to joining Sophia University, he conducted research at Nippon Telegraph and Telephone Corporation for almost a decade. At Sophia University, he is a full Professor in the Department of Engineering and Applied Sciences at the Faculty of Science and Technology. His research focuses on hydrogen embrittlement in metals, with a particular interest in understanding the hydrogen trapping sites in metals and developing high-strength steels with high resistance to hydrogen embrittlement.

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