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经淬火、回火处理后,对3Cr13不锈钢进行氮碳氧复合渗可提高其硬度和耐蚀性,研究了不同预热方式对该钢复合渗层硬度和耐蚀性的影响。结果表明:不预热直接进行氮碳氧复合处理后,3Cr13不锈钢渗层薄,且不均匀;经400℃空气炉中预热及氧化盐浴中预热后,渗层厚度较厚,且均匀。3Cr13不锈钢经复合处理后表层硬度大幅提高,400℃空气炉中及氧化盐浴中预热试样表层(距表面距离≤45μm)硬度比不预热试样硬度高100~150 HV0.1。3Cr13不锈钢复合渗层耐蚀性由高到低为:400℃空气炉中预热、400℃氧化盐浴中预热、不预热。
After quenching and tempering, the hardness and corrosion resistance of 3Cr13 stainless steel were improved by nitrocarburizing, and the effects of different preheating methods on the hardness and corrosion resistance of the steel were studied. The results show that the infiltration layer of 3Cr13 stainless steel is thin and uneven after being preheated directly in the air oven at 400 ℃ and preheated in an oxidation salt bath without preheating. The thickness of the infiltration layer is thick and uniform . The surface hardness of 3Cr13 stainless steel after composite treatment is greatly increased. The surface hardness of sample (≤45μm away from the surface) preheated in 400 ℃ air oven and oxidation salt bath is higher than that without preheat. The hardness of sample is 100 ~ 150 HV0.1.3Cr13 Corrosion resistance of stainless steel composite infiltration layer from high to low: 400 ℃ preheated in the air oven, 400 ℃ oxidation salt bath preheating, not preheating.