论文部分内容阅读
应用一种新型真空感应渗氮方法对38CrMoAl钢表面制备渗氮层,采用SEM、EDS、自动显微硬度测试、滑动干摩擦试验等测试方法探讨了渗氮温度对38CrMoAl钢渗氮层组织、硬度和耐磨性的影响规律。结果表明:渗氮层表面平整,白亮层、扩散层、基体之间过渡平缓;随着渗氮温度升高,扩散层厚度、渗层硬度、耐磨性均呈现先增加后降低趋势;渗氮温度为560℃时,渗层厚度达到最高值180μm,渗层硬度达到最高值1250 HV0.025;渗氮温度560℃、590℃时的渗层试样在摩擦试验过程中仅有轻微的磨粒磨损,耐磨性能最佳。
A new type of vacuum nitriding method was used to prepare nitrided layer on the surface of 38CrMoAl steel. The microstructure and hardness of nitrided layer of 38CrMoAl steel were investigated by SEM, EDS, automatic microhardness test and sliding dry friction test. And wear resistance of the law. The results show that the surface of nitrided layer is smooth and the transition between white bright layer, diffusion layer and matrix is smooth. With the increase of nitriding temperature, the thickness of diffusion layer, the hardness of hardened layer and the wear resistance increase first and then decrease. Nitriding When the temperature is 560 ℃, the maximum thickness of the coating reaches 180μm and the hardness of the coating reaches the highest value of 1250 HV0.025. The nitriding temperature of 560 ℃ and 590 ℃ is only slightly abrasive during the tribological test Wear, wear the best performance.