铝合金车轮铸造裂纹研究

Study on Casting Cracks for Aluminum Alloy Wheel

铸造裂纹是铸件产品常见的失效形式之一,运用模拟分析对特定铸件的裂纹原因进行分析,结果表明:该铸件裂纹失效位置的残余应力和塑性变形比较大,同时存在较高的热裂和冷裂风险,通过更改局部造型可以有效减少失效位置的残余应力和塑性变形,从而降低裂纹风险,并通过实际验证,裂纹缺陷导致的报废率大大降低。

Casting crack is one of the common failure modes of casting products. The causes of the casting crack in specific castings were analyzed by using of simulation analysis. The results showed that the residual stress and plastic deformation at the crack failure position of the casting were relatively large, and there was a high risk of hot tearing and cold cracking at the same time. The residual stress and plastic deformation at the failure position can be effectively reduced by changing the local shape, thus reducing the crack risk. The scrap rate caused by the crack defects was greatly reduced through the actual verification.