论文部分内容阅读
利用自主研制的真空感应渗氮装置在38CrMoAl钢表面制备渗氮层,探讨渗氮压力对渗氮层组织与性能的影响,并采用SEM、自动显微硬度测试、滑动干摩擦及电化学极化试验等分析了渗氮硬化层的显微组织、硬度、耐磨性与耐蚀性。结果表明:经渗氮处理后的试样表层平整,白亮层、扩散层、基体之间过渡平缓。随着渗氮压力的上升,渗层厚度增加,渗层硬度、耐磨性先提高后下降,-30 kPa时表面硬度达到1200 HV0.025,耐磨性提高约5倍。
The nitriding layer was prepared on the surface of 38CrMoAl steel by vacuum induction nitriding device. The effect of nitriding pressure on the microstructure and properties of nitrided layer was discussed. SEM, automatic microhardness test, sliding dry friction and electrochemical polarization The microstructure, hardness, wear resistance and corrosion resistance of the nitrided hardened layer were analyzed by experiments and the like. The results show that the surface of the sample after nitriding is smooth and the transition between white bright layer, diffusion layer and substrate is smooth. With the increase of nitriding pressure, the thickness of the layer increases, the hardness and wear resistance of the layer increase first and then decrease, the surface hardness reaches 1200 HV0.025 at -30 kPa, and the wear resistance increases about 5 times.