Low Temperature Carburizing of Stainless Steels and the Development of Carbon Expanded Austenite*

IF 0.3 Q4 THERMODYNAMICS HTM-Journal of Heat Treatment and Materials Pub Date : 2022-02-01 DOI:10.1515/htm-2022-0001
K. Werner, H. Che, M. Lei, T. Christiansen, M. Somers
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引用次数: 6

Abstract

Abstract Low-temperature carburizing dramatically enhances the inherently low wear resistance of austenitic stainless steels due to the formation of a carbon-supersaturated solid solution, i.e. expanded austenite. The formation of expanded austenite from low-temperature carburizing has been intensively investigated. However, the influence of chemical composition of the stainless steel on the carburizing response has not received the same interest. This contribution addresses the effect of the chemical composition on low-temperature carburizing in terms of carbon solubility, decomposition of expanded austenite upon exceeding the solubility limit and the elasto-plastic accommodation of the carbon-induced lattice expansion. The results demonstrate that the carbon solubility increases with an increasing Cr-equivalent and that higher Cr- and Ni-equivalents favor the formation of Cr-based M7C3 over Fe-based Hägg (M5C2) carbide.
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不锈钢的低温渗碳和碳膨胀奥氏体的发展*
低温渗碳可以显著提高奥氏体不锈钢固有的低耐磨性,这是由于碳过饱和固溶体的形成,即膨胀奥氏体。低温渗碳后膨胀奥氏体的形成已被深入研究。然而,不锈钢的化学成分对渗碳反应的影响却没有受到同样的关注。这一贡献解决了化学成分对低温渗碳的影响,包括碳溶解度、超过溶解度极限时膨胀奥氏体的分解以及碳诱导晶格膨胀的弹塑性调节。结果表明,碳溶解度随Cr当量的增加而增加,较高的Cr和ni当量有利于形成Cr基M7C3而不是fe基Hägg (M5C2)碳化物。
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来源期刊
CiteScore
1.50
自引率
33.30%
发文量
43
期刊最新文献
HTM Praxis Combined CFD and Heat Treatment Simulation of High-Pressure Gas Quenching Process Optimizing the Solution Annealing of Additively Manufactured AlSi10Mg AWT-Info / HTM 05-2023 Contents / Inhalt
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