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通过金相、SEM和TEM观察,表面粗糙度测试和电化学实验方法,对经过不同温度淬火和回火的国产Cr13型马氏体不锈钢的微观组织演变及其对材料硬度,表面光洁度和耐蚀性能的影响进行了分析研究.结果表明,马氏体是基体中的主要相,当回火温度为650℃时,铁素体变成基体中的主要相,随着回火温度的提高,不锈钢基体组织发生了由回火马氏体到回火索氏体的演变.回火后,材料的硬度降低,当回火温度达到650℃,材料硬度降至22 HRC,其表面光洁度大幅度降低.同时,回火材料的耐点蚀性能低于淬火态材料,且随着回火温度的提高,马氏体不锈钢的点蚀电位降低,并在500℃时达到最差.

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