Hardening Ferritic Stainless Steels
July 15, 2016
Source:
Ferritic stainless steels are quite similar in their mechanical behavior to carbon steel. The main influence of chromium is to produce some solid solution hardening. Intermetallic phases may increase hardness (sometimes usefully) and decrease ductility, notch toughness, and corrosion resistance. For example, the graph shows the hardening effect of the alpha prime phase.
Volume 4D, Heat Treating of Irons and Steels ⇒ Heat Treated High-Alloy Steels ⇒ Heat Treating of Ferritic Stainless Steels ⇒ Properties
Ferritic stainless steels are quite similar in their mechanical behavior to carbon steel.
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One Minute Mentor: Hardening Ferritic Stainless Steels
Source: ASM International
Ferritic stainless steels are quite similar in their mechanical behavior to carbon steel.
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Message from the President: Hall of Fame and President Awards
July 13, 2016
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This year again, key thermal spray leaders were introduced to the TSS Hall of Fame to recognize their exceptional contributions to the science, technology, practice, education, management, and advancement of thermal spraying. The recipients of this most prestigious award are selected by the Hall of Fame Selection Committee, and nominations are approved by the TSS Board. The new Hall of Fame inductees were recognized in a special awards session at ITSC 2016 in Shanghai.
Prof. Chuanxian Ding from the Shanghai Institute of Ceramics, Chinese Academy of Sciences, was acknowledged for pioneering the science and technology of thermal spray in China, especially in the area of emerging applications, and for mentoring students and young professionals. Our second inductee was Dr. Seiji Kuroda from the National Institute for Materials Science in Japan. Seiji was recognized for his pioneering research on residual stress in thermal spray coatings, development of in-situ beam curvature techniques, in-flight particle diagnostics, and warm spray technology. Prof. Armelle Vardelle from Université de Limoges in France was selected for her exceptional contributions to understanding the role of plasma generation and plasma-particle interaction on coatings microstructure. Finally, Dr. Thomas A. Taylor from Praxair Surface Technologies was recognized for his significant contributions to new and novel thermal barrier coating architectures and rub-tolerant and MCrAlY coatings for gas and turbine engines.
These four leaders from three continents have dedicated a significant portion of their careers to the advancement of thermal spray, and made contributions that improved our understanding and use of thermal spray technologies.
In addition, I want also to recognize the exceptional work of Dr. Jeganathan Karthikeyan from ASB Industries over the last 20 years! I had the pleasure to present the TSS President's Award to Karthi in June on the occasion of his retirement. We all appreciate his exemplary service to our Society in organizing successful topical events, participating in TSS Committees, and serving as Director of the TSS Board from 2008-2011.
Thanks to all awardees and to all of you who, by your dedication, time and energy, contribute to the growth of thermal spray engineering across the world.
Christian
Prof. Christian Moreau, President
ASM Thermal Spray Society
This year again, key thermal spray leaders were introduced to the TSS Hall of Fame to recognize their exceptional contributions to the science, technology, practice, education, management, and advancement of thermal spraying. The recipients of this most prestigious award are selected by the Hall of Fame Selection Committee, and nominations are approved by the TSS Board. The new Hall of Fame inductees were recognized in a special awards session at ITSC 2016 in Shanghai.
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Alcoa aluminum flies high on Embraer aircraft
Source: ASM International
Alcoa, Pittsburgh, announces a multiyear agreement with Embraer, Sao Paulo, in which Alcoa will supply aluminum sheet and plate for Embraer’s new E2, the second generation of its E-Jets family of commercial aircraft, a narrow-body medium-range jet airliner.
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MB Aerospace acquires Vac Aero Poland for heat treating and thermal spray
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MB Aerospace, East Granby, Conn., has acquired Vac Aero (Poland) from its Canadian parent company, Vac Aero International, for its extensive range of special process capabilities, including heat treatment and vacuum brazing, vacuum carburizing, air plasma spray (APS), and high-velocity oxygen fuel (HVOF) thermal spray coatings, as well as corrosion and oxidation-resistant paint coatings. The former Vac Aero subsidiary has a range of customer approvals and will continue to serve key customers in Europe, including UTC, Pratt & Whitney, and Siemens.
The business, which employs over 100 people at two sites in Kalisz (central Poland) and Rzeszow (south-east Poland), specializes in providing protective and performance-enhancing coatings for aero-engine and industrial gas turbine components. These OEM-licensed and proprietary coatings provide resistance to wear, corrosion, and heat across performance-critical compressor, combustor, and turbine components.
The business will remain at its two current sites and will be immediately rebranded as MB Aerospace Technologies (Poland). In order to support the existing customer base and the growing aerospace market in Eastern Europe, MB Aerospace is planning to invest across the business with particular focus on its surface coating services, including thermal and plasma coatings and a range of paint capabilities, as well as heat treatment and brazing processes.
According to Craig Gallagher, MB Aerospace chief executive officer, "With thermal and plasma coating capabilities now available to us in the region, we can provide customers with fast, responsive lead times for aero-engine and industrial gas turbine component treatments, whilst mitigating the logistics, and cost, of shipping products long distances to have such critical work done."
"We have inherited a well-established and respected business in Poland with highly skilled employees and a wide range of customer approvals," says Dave Farmery, managing director of MB Aerospace Poland. "Working closely with the existing team, we will invest heavily to provide the local market with the capabilities and capacity required to ensure customers continue to receive a world-class service."
www.mbaerospace.com
MB Aerospace, East Granby, Conn., has acquired Vac Aero (Poland) from its Canadian parent company, Vac Aero International, for its extensive range of special process capabilities, including heat treatment and vacuum brazing, vacuum carburizing, air plasma spray (APS), and high-velocity oxygen fuel (HVOF) thermal spray coatings, as well as corrosion and oxidation-resistant paint coatings.
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Aichelin Group acquires AFC-Holcroft for its heat treating furnace equipment
Source:
Aichelin Group, Austria, announces that it has acquired U.S.-based Atmosphere Group, the holding company of AFC-Holcroft, said to be the U.S. market leader in the production of industrial furnace equipment for ferrous and nonferrous metals. According to Aichelin, the two groups are a perfect fit: Both are leading market players with a long-standing history and state-of-the-art technologies and services in the industrial area of heat treatment solutions.
Aichelin Group's business model covers all stages of the lifecycle: From design, engineering, manufacturing and installation at customer sites, to comprehensive maintenance and spare part services. By combining the networks of Aichelin Group and AFC-Holcroft, customers will get the best of two worlds: An enlarged, high quality product portfolio as well as an innovative, worldwide service network.
As the next step, a process will start to integrate AFC-Holcroft and its sister companies into Aichelin Group's network in the coming months. AFC-Holcroft's headquarters will remain in Wixom, Michigan. The current top management stays in place and most customers will keep their key account managers.
Aichelin Group includes manufacturing companies Aichelin, EMA Indutec, Safed, Bosio, and Noxmat, which provide plants and systems.
In addition to AFC-Holcroft, the Atmosphere Group includes Atmosphere Heat Treating and Austemper Inc. Until now, Atmosphere Group was privately held. The parties agreed not to disclose details or the price of the transaction.
The acquisition complements the geographic presence of Aichelin Group and strengthens the Group's overall market position as one of the leading global heat treatment groups. It is now the largest provider of atmosphere furnaces worldwide. With a strong presence in Europe, North America, and Asia, the joint annual turnover generated by 1100 employees amounts to over $216 million (2015). The group operates a network in 32 countries.
www.aichelin.com
Aichelin Group, Austria, announces that it has acquired U.S.-based Atmosphere Group, the holding company of AFC-Holcroft, said to be the U.S. market leader in the production of industrial furnace equipment for ferrous and nonferrous metals.
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Facility dedicated to heat treating Mg and Al aerospace parts is Nadcap certified
July 12, 2016
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Wallwork Heat Treating Co., England, announces that it has a dedicated, Nadcap-certified heat treatment facility for magnesium and aluminum components ranging from small parts to large fabrications. Aluminum and magnesium are seen by some thermal processors as difficult to treat, but over the last four years Wallwork has increased capability and steadily expanded these services.
Starting with commercial work and now extending Nadcap approvals to meet the needs of aerospace customers, the company treats a wide variety of parts, from small metal pressings to large cast, fabricated, or machined components. These are destined for applications as varied as aerospace and satellites, to sports cycles.
The main furnace has a capacity of up to 1760 pounds and can process components occupying up to 70 cubic feet. Variable quench facilities including air, water, and polymers are available to meet different technical requirements. With these methods, quench cycles can be as short as ten seconds.
In aerospace particularly, post treatment validation is vital. Our in-house laboratories are able to perform key tests and provide documentation to certify conformance to specifications. With a dedicated fleet of over 40 vehicles, we provide a national service.
www.wallworkht.co.uk
Wallwork Heat Treating Co., England, announces that it has a dedicated, Nadcap-certified heat treatment facility for magnesium and aluminum components ranging from small parts to large fabrications.
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Spray Tips: Enthalpy Content of Plasma Spray Gases
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The graph plots the energy content, or enthalpy, of the gases as a function of temperature. It can be seen that argon and helium exhibit higher temperatures, whereas nitrogen and hydrogen exhibit higher enthalpies. Therefore, combinations of these gases can produce the required temperature, enthalpy, and gas velocity.
Direct-current, plasma arc spray is the most flexible of the thermal spray processes with respect to materials that can be sprayed, because of the inert gases, high gas velocity, and extremely high temperatures and energies. Plastic/polymers, metals and alloys, and ceramics can all be sprayed using plasma spray. Plasma arcs can be used for applying coating, creating free-standing shapes (near-net fabrication), and materials processing, for example, spheroidization.
Volume 5A, Thermal Spray Technology ⇒ Thermal Spray Processes and Coatings ⇒ Thermal Spray Processes
The graph plots the energy content, or enthalpy, of the gases as a function of temperature.
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Renishaw launches additive manufacturing system and AM Solutions Centers
July 11, 2016
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Renishaw, UK, introduces the new RenAM 500M additive manufacturing system, a laser-based powder bed fusion system designed specifically for the production of metal components on the factory floor. Fully designed and engineered in-house to be used for serialized production, the RenAM 500M builds complex metal components directly from CAD models. Highlights of the system include a Renishaw-designed and engineered optical system with dynamic focusing, automated powder sieving and recirculation, a 500-watt ytterbium fiber laser, and the patented high-capacity SafeChange dual filter system.
Renishaw also recently launched Additive Manufacturing Solutions Centers. These aim to provide businesses with a secure development environment in which they can build their knowledge and confidence using additive manufacturing technology. Each center will house the latest Renishaw AM systems, and will be staffed with knowledgeable engineers, offering a fast, accessible, and affordable way to rapidly evaluate and deploy additive manufacturing.
Renishaw, UK, introduces the new RenAM 500M additive manufacturing system, a laser-based powder bed fusion system designed specifically for the production of metal components on the factory floor.
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GKN Aerospace establishes global centers of excellence for additive manufacturing
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GKN Aerospace, UK, announces that it has established global centers of excellence for additive manufacturing in the United States, Sweden, and the United Kingdom. Processes include: electron beam melting (EBM), laser powder bed (LPB), and stereolithography (SLA). A key objective is to develop large scale deposition systems that can produce large near-net AM preforms for engine and airframe structures, as well as optimized structures such as large bulkheads, wing ribs, and spars, all of which would be too large for powder bed AM processes.
AM requires much less machining than traditional forgings or castings by adding material where needed. It can offer weight savings of 15-30% over traditional processes. Titanium AM parts produced for ULA's Vulcan rocket engine in the United States are just one example of a large AM part produced by GKN Aerospace already in use. In the Vulcan rocket application, the individual large titanium alloy AM parts were welded together to form the casings.
www.GKNaerospace.com
GKN Aerospace, UK, announces that it has established global centers of excellence for additive manufacturing in the United States, Sweden, and the United Kingdom.
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