粉末冶金齿毂模具裂纹分析与解决方法

从压制阴模模具材料、热处理制度、金相组织等方面研究了粉末冶金压制阴模键子处裂纹形成原因，讨论了粉末冶金齿毂模结构及压制模具设计结构的合理性，通过分析数据得到了开裂的原因并加以改正。结果表明，压制阴模本身的材质选择和热处理制度没有问题，导致裂纹产生的主要原因是整体模具结构设计不合理，导致压制阴模键子损坏。改进原有模具结构可以提高压制模具寿命，降低模具使用成本，保证生产顺利进行。

Analysis and solution of cracks in gear hub die by powder metallurgy

The formation of cracks in pressing female dies by powder metallurgy were investigated by die materials, heat treatment process, and metallurgical structures, the structure of gear hub die by powder metallurgy and the design reasonability of pressing dies were discussed, and the crack formation reasons were analyzed and corrected through the detailed data of pressing female dies in this paper. In the results, the material selection and heat treatment process have no connection with the crack formation, the inappropriate design of die structure is the primary reason for the crack formation. Improving the pressing female die structure of gear hub could increase the service life of die, reduce the cost of die, and keep the production running smoothly.