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在铜合金冷却器盖生产过程中,主要问题是铸造缺陷导致铸件出现渗漏现象,无法满足质量要求。通过扫描电镜观察冷却器盖铸件铸造缺陷的宏观及微观形貌,检测其化学成分,探讨其产生缺陷的原因。结果表明,金属液产生少数氧化夹渣,以及铸件不能完全补缩而产生的缩孔是导致铸造缺陷的主要原因。通过加快熔炼速度、控制浇注温度、优化浇注工艺,可避免缩孔缺陷产生,提高铸件的质量。采用ProCAST模拟软件对新工艺进行了数值模拟,试验结果与模拟结果一致,铸件渗漏缺陷问题得到解决。
In the copper alloy cooler cap production process, the main problem is casting defects lead to castings seepage phenomenon, can not meet the quality requirements. Scanning electron microscope (SEM) was used to observe the macroscopic and microscopic appearance of casting defects of cooler cap casting. The chemical composition of the casting defects was investigated and the reasons for the defects were also discussed. The results show that the molten metal produced a small number of oxide inclusions, as well as castings can not be completely shrinkage and shrinkage is the main reason leading to casting defects. By speeding up the melting speed, controlling the pouring temperature and optimizing the pouring process, it can avoid the shrinkage hole defects and improve the casting quality. ProCAST simulation software was used to simulate the new technology. The experimental results are consistent with the simulation results. The problem of casting defects was solved.