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对AISI304奥氏体不锈钢进行脉冲电流辉光离子渗氮处理,在不同处理温度(480℃、520℃、580℃)下渗氮8h后,获得了一定厚度的渗氮层。通过对渗层进行金相分析和硬度测试表明,随着渗氮温度升高,渗层厚度增大,显微硬度先增大后减小。综合温度对渗层厚度与显微硬度的影响,AISI304奥氏体不锈钢卡套辉光离子渗氮温度可采用520℃,渗氮后渗层厚度为90μm,显微硬度为1317HV0.1。
Pulse current glow plasma nitriding of AISI304 austenitic stainless steel was carried out. After nitriding at different treatment temperatures (480 ℃, 520 ℃, 580 ℃) for 8h, a certain thickness of nitrided layer was obtained. Through the metallurgical analysis and hardness testing of the infiltrated layer, it shows that with the increase of the nitriding temperature, the thickness of the infiltrated layer increases and the microhardness firstly increases and then decreases. Combined with the influence of temperature on the thickness and microhardness, the glow-ion nitriding temperature of AISI304 austenitic stainless steel ferrule can be 520 ℃, the thickness of nitrided layer is 90μm and the microhardness is 1317HV0.1.