做和一种新的不锈钢热处理方法走向商业化

一种新的不锈钢热处理方法走向商业化

Swagelok公司()研制了一种新的不锈钢材料,和传统不锈钢材料相比,硬度和抗腐蚀能力上都有较大的提高，该公司的LTCSS热处理方法使得大量的碳原子渗透到奥氏体不锈钢内，大大提高了硬度和其他物理特性。

传统的不锈钢热处理在硬度和抗腐蚀能力上需要一个权衡，不能同时获得两种性能都好的材料。Swagelok宣称他们的LTCSS技术则可以直接将碳元素渗入不锈钢的奥氏体晶体中，从而同时获得较好的硬度和抗腐蚀能力。和传统的热处理方式相比，LTCSS所处理的不锈钢表面强度提高3－4倍，抗磨损能力提高100倍，抗腐蚀能力提高5.5倍，抗疲劳强度提高约50%，并获得镍基合金和钛的某些物理特性。

整体来看，这是近几十年材料科学中的一次突破。

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New heat-treatment for stainless steels heads for commercialization

Swagelok Company (www.swagelok.com) has developed a new form of stainless steel that the company says maintains its h薄膜厚度延续增加时(> 500um)ardness and corrosion resistance at the same time.

The company has formed a new, wholly owned subsidiary to market and commercialize its Low-Temperature Colossal Supersaturation (LTCSS) heat treating process. The process heat-treating austenitic stainless steels that enables large-scale carbon absorption into austenitic stainless steels, and dramatically improves their hardness and other performance characteristics.

The new company w主要用在仪表台、座垫、座椅靠背、头枕、车门、扶手、汽车顶棚、门内板和密封件等部位;2是在汽车功能件上利用(含外饰件及各种功能件)ill be headquartered in Cleveland. Its name will be announced as part of the company’s business and marketing plan. 字串4

Materials scientists have seen that carbon atoms cannot be introduced into austenitic stainless steel through heat treatment without the formation of chromium carbides, which compromise the corrosion resistant properties of the alloy. Hardness and corrosion resistance are typically regarded as tradeoffs.

Swagelok says its LTCSS process introduces carbon atoms into an austenitic crystal structure without the formation of chromium carbides — in fact, carbon absorption is about 80,000 greater than thermodynamics and kinetics would suggest would be possible. Changes occur at the surface of the stainless steel component being treated, not all the way through to the core. As a result, the surface hardness of austenitic stainless steels treated with the LTCSS process increases by about three to four times. At the same time, the company says there is evidence of improved corrosion resistance; wear resistance increases by 100 times; erosion resistance increases两款材料都全自动冲击实验机摆锤容易出现的问题有哪些？如何解决可以到达850度炽热丝 by 5.5 times; and fatigue strength increases by approximately 50 percent. The improved characteristics give stainless steels performance characteristics similar to alloys such as Hastelloy or titanium.

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The weldability of LTCSS-processed materials is currently under study. The process may be performed on finished components without distortion or change of dimension, including components with complex shapes and structures, and no compromise of ductility. These outcomes have been verified by research at Case Western Reserve University, Oak Ridge National Laboratory, the U.S. Naval Research Laboratory, and Northwestern University. Possible applications could include uses in the automotive, medical, aerospace and defense, oil and gas, and pulp and paper industries.

“Arguably, this is one of the most significant breakthroughs in materials science in many decades, as well as one with many extraordinary technological implications,” said Arthur Heuer, Ph.D., University Professor and Kyocera Professor of Materials Science and Engineering at Case Western Reserve University. Heuer’s work was been instrumental in verifying the characteristics of LTCSS.

John Buda, formerly Swagelok’s manager for strategic accounts, has been named president