摘要
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,hardness and corrosion resistance of 3Cr13 stainless steel were improved by nitrogen carbon and oxygen composite diffusion process,and effect of preheating method on depth and properties of nitrogen carbon and oxygen composite coating on the steel was studied. The results show that without preheating directly nitrogen carbon and oxygen diffusion,the depth of the coating is thin and nonuniform,after preheated at 400 ℃ in air furnace or oxidation salt bath,the thickness of the coating is thicker and uniform. After nitrogen carbon and oxygen diffusion,the surface hardness of the steel increase significantly,the hardness of preheated in air furnace or oxidation bath sample is 100-150 HV0. 1 higher than that of unpreheated sample. The corrosion resistance of the coating from high to low is as follow: preheated at 400 ℃ in air furnace,and in oxidation salt bath,without preheating.
引文
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