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首页> 外文期刊>Journal of Materials Engineering and Performance >Effect of Quenching Process on the Microstructure and Hardness of High-Carbon Martensitic Stainless Steel
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Effect of Quenching Process on the Microstructure and Hardness of High-Carbon Martensitic Stainless Steel

机译：淬火工艺对高碳马氏体不锈钢组织和硬度的影响

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摘要

The microstructure and hardness of high-carbon martensitic stainless steel (HMSS) were investigated using thermal expansion analyzer, Thermo-calc, scanning electron microscope, x-ray diffraction, and Ultra-high temperature confocal microscope. The results indicate that the experimental steel should be austenitized in the temperature range of 1025-1075 degrees C, which can give a maximum hardness of 62 HRc with the microstructure consisting of martensite, retained austenite, and some undissolved carbides. With increasing austenitizing temperature, the amount of retained austenite increases, while the volume fraction of carbides increases first and then decreases. The starting temperature and finish temperature of martensite formation decrease with increasing cooling rates. Air-quenched samples can obtain less retained austenite, more compact microstructure, and higher hardness, compared with that of oil-quenched samples. For HMSS, the martensitic transformation takes place at some isolated areas with a slow nucleation rate.
机译：使用热膨胀分析仪，热计算，扫描电子显微镜，X射线衍射和超高温共聚焦显微镜研究了高碳马氏体不锈钢（HMSS）的组织和硬度。结果表明，实验钢应在1025-1075摄氏度的温度范围内进行奥氏体化，其显微组织由马氏体，残余奥氏体和一些不溶的碳化物组成，可以提供62 HRc的最大硬度。随着奥氏体化温度的升高，残余奥氏体的数量增加，而碳化物的体积分数先增加然后减小。马氏体形成的起始温度和结束温度随冷却速率的增加而降低。与油淬火的样品相比，空气淬火的样品可获得更少的残留奥氏体，更紧密的显微组织和更高的硬度。对于HMSS，马氏体转变发生在成核速率较慢的某些孤立区域。

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