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研究了离子渗氮温度对00Cr22Ni5Mo3N双相不锈钢表面渗氮层性能和组织的影响。采用HXD-1000TMC显微硬度计、扫描电镜、能谱仪和PARSTA 4000电化学工作站对其表面硬度、组织、成分和耐腐蚀性能进行分析。结果表明,随渗氮温度的升高,渗氮层表面硬度先增加后降低。耐腐蚀性随渗氮温度的上升而降低。当渗氮温度高于500℃时,渗氮层中的Cr被大量析出,造成周围区域贫Cr,从而使耐腐蚀性能下降。当渗氮温度为450℃时,渗氮层的综合性能最佳。
The effect of ion nitriding temperature on the nitriding layer and microstructure of 00Cr22Ni5Mo3N duplex stainless steel was studied. Surface hardness, microstructure, composition and corrosion resistance were analyzed using a HXD-1000TMC microhardness tester, scanning electron microscopy, energy dispersive spectrometer and PARSTA 4000 electrochemical workstation. The results show that with the increase of nitriding temperature, the surface hardness of nitrided layer first increases and then decreases. Corrosion resistance decreases with increasing nitriding temperature. When the nitriding temperature is higher than 500 ° C, Cr in the nitriding layer is precipitated in a large amount, resulting in depletion of Cr in the surrounding area, thereby decreasing the corrosion resistance. When the nitriding temperature is 450 ℃, nitriding layer has the best overall performance.