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本文总结了40Cr,45~#,18CrNiW,18CrMnTi,20CrMo,38CrMoAl 及球铁等材料采用不同温度,和保温时间氮化工艺试验。结果表明氮化层表面硬度梯度随氮化温度时间的变化规律;以及不同氮化工艺对材料机械性能的影响。说明只要氮化温度不超过予处理回火温度,则材料强度指标不变。虽然高硬度的氮化层使材料表层塑性有所损失,但并不影响实际使用性能。本文还对40Cr,18CrNiW,18CrMnTi 三个钢种离子氮化前后及渗碳状态的试样弯曲旋转疲劳试验进行分析和探讨,实验表明离子氮化能显著提高材料疲劳强度,并大大减小材料的缺口敏感性。列举了离子氮化的实际应用情况.
This article summarizes the 40Cr, 45 ~ #, 18CrNiW, 18CrMnTi, 20CrMo, 38CrMoAl and ductile iron and other materials using different temperatures, and holding time nitriding process test. The results show that the surface hardness gradient of nitrided layer varies with the nitriding temperature and time, and the effect of different nitriding process on the mechanical properties of the material. As long as the nitriding temperature does not exceed pre-treatment tempering temperature, the material strength index unchanged. Although the hardness of the nitrided layer of plastic material on the surface of the loss, but does not affect the actual performance. In this paper, bending fatigue fatigue test of three kinds of steels before and after nitriding and carburizing of 40Cr, 18CrNiW and 18CrMnTi steel were also analyzed and discussed. The results show that the ionic nitridation can significantly improve the fatigue strength of the material and greatly reduce the material fatigue Gap sensitivity. Lists the practical application of ion nitriding.