40GrNiMo中硬齿轮材料点蚀破坏的金相研究

Study on Pitting Failure of Gear Material 40CrNiMo With Medium Hardness by Means of Metalloscopy

采用金相试验方法 ,对 4 0 Cr Ni Mo中等硬度齿轮材料在接触疲劳过程中的表面破坏形态、裂纹的萌生与扩展等问题进行了研究 。

By means of metalloscopy,the paper deals with the crack initiation and propagation as well as the fracture morphology of the surface in a gear material 40CrNiMo with medium hardness,meanwhile it analyzes the failure mechanism of the material on metallograpy.