ABSTRACT This paper presents the influence of a nanobainitising (N-B) and bainitising, quenching and partitioning (B-Q&P) heat treatments on corrosion resistance and wear resistance in corrosive environment on carburised 42NiSiMo8-3-7-F steel, as compared to steel after quenching and tempering (Q&T). Nanobainitizng leads to produce nanobainitic microstructure and the B-Q&P treatment resulted in ultra-fine, multiphase microstructure composed of nanobainite, martensite and temperature-stable austenite. It was revealed that steel after novel heat treatments, despite multiphase microstructure, large number of grain boundaries and high residual stress showed similar corrosion resistance in 3.5% NaCl solution and better wear resistance in dry sliding conditions as well as in corrosive environment. In addition, volume loss due to wear in corrosive environment was almost twice as low as in dry sliding test. Obtained results show that novel heat treatments of steel may be successfully applied instead of traditional Q&T without the risk of lowering corrosion resistance.

中文翻译：

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纳米晶42NiSiMo8-3-7-F钢的摩擦腐蚀

摘要 本文介绍了纳米贝氏体化 (NB) 和贝氏体化、淬火和分配 (BQ&P) 热处理对渗碳 42NiSiMo8-3-7-F 钢在腐蚀环境中的耐腐蚀性和耐磨性的影响，与淬火和淬火后的钢相比。回火（Q&T）。纳米贝氏体化导致产生纳米贝氏体微观结构，BQ&P 处理产生由纳米贝氏体、马氏体和温度稳定奥氏体组成的超细多相微观结构。结果表明，经过新型热处理的钢，尽管具有多相组织、大量晶界和高残余应力，但在 3.5% NaCl 溶液中表现出相似的耐腐蚀性能，并且在干滑动条件和腐蚀环境中具有更好的耐磨性。此外，由于在腐蚀环境中磨损造成的体积损失几乎是干滑动试验中的两倍。获得的结果表明，可以成功地应用钢的新型热处理代替传统的 Q&T，而不会降低耐腐蚀性。