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本文对碳氮共渗层中残留奥氏体作用机理及其对性能的影响进行了研究。实验结果指出,共渗层中存在30～50%的残留奥氏体,可提高钢的抗磨损性能、接触疲劳性能和弯曲疲劳性能。文中探讨了其作用机理,认为,共渗层中残留奥氏体上存在大量弥散分布的CrN质点,不但可保证残留奥氏体的基体强度和硬度,而且也显著提高零件抗磨损和疲劳性能。
In this paper, the mechanism of residual austenite in carbonitrided layer and its effect on the properties were studied. The experimental results show that there are 30 ~ 50% retained austenite in the co-diffusion layer, which can improve the wear resistance, contact fatigue properties and bending fatigue properties of the steel. In this paper, the mechanism of action is discussed. It is considered that there are a lot of CrN particles distributed on the retained austenite in the common layer, which can not only ensure the matrix strength and hardness of the retained austenite, but also significantly improve the wear resistance and fatigue properties of the part.