摘要
以油底壳为例,分析了壁薄、深型腔、大平面铝合金金属型重力铸件,产生裂纹缺陷的原因,确定是合金凝固时期的热应力和收缩应力所致。通过控制化学成分、强化精炼、分散引注、提高模具温度、调整涂料厚度强化凝固顺序等工艺措施,成功解决了该类缺陷,获得了良好的经济效益。这些工艺措施对同类产品的同类缺陷非常有效,同时对拓宽金属型在有色铸造领域的应用有着重要的意义。
The study was taken an oil sump as an example to analyze crack defect of permanent mold aluminum casting with thin thickness, deep cavity and large plane, and two causes, thermal stress and shrinkage stress during casting solidification. It is proposed that the measures should be taken to control chemical composition, refine intensely, pour dispersedly, increase mould temperature, adjust coat thickness and solidification sequence. This kind of defect has been solved successfully, thus obtain a good economic benefits. The measure is extremely effective to similar defects of the similar castings. It has a important significance to broaden permanent mold casting in the nonferrous alloy.
出处
《铸造技术》
EI
CAS
北大核心
2006年第6期635-637,共3页
Foundry Technology
关键词
油底壳
裂纹
金属型铸件
Oil sump
Crack
Permanent mold casting
