压铸件裂纹的产生与消除

Formation and Elimination of Crack in Die Casting

结合生产实践中遇到的裂纹缺陷 ,论述了压铸件裂纹形成机理及消除裂纹的措施。认为控制材料的化学成分 ,在许可范围内尽量增大铸造圆角 ,减小壁厚差 ,合理分布模具中的温度场 ,改善模具排气状况 。

Formation mechanism of the crack and its preventive methods in die casting were studied. It is found that formation of the crack can be prevented effectively by controlling chemical composition of the materials, increasing casting round and reducing difference of wall thickness in possibly permitted range, properly distributing temperature field and improving venting condition in die.