The microstructure of the samples was observed;the carbonitriding layer depth and the gradient of heardness were measured;the wear resistance and contact fatigue properties of the samples were tested.

• 同时对其最佳工艺做出的试样进行组织、硬度、渗层深度、硬度梯度、耐磨性、接触疲劳性等性能的测试与比较。