摘要
针对传统压铸工艺在生产超厚型产品时存在的气孔率高、强度低等问题,研究开发了某发动机支架零件的超低速压铸工艺,讨论了不同压射速度、内浇口厚度、浇注温度以及模具结构和模温控制等因素对压铸产品质量的影响。结果表明,当低速压射速度为0.25m/s,高速压射速度为0.5m/s,内浇口厚度为5.2mm,浇注温度为680～690℃时,获得的铸件质量最好。通过对超低速压铸模具结构进行改进,并采用顺序凝固模温控制方法,满足了对铸件进行T6热处理的要求,使产品性能有较大提升。
aiming at problems existed in the traditional die casting super-thickness product, such as high porosity, low strength, the ultra-low-speed die casting engine support bracket was conducted, and effects of different injection speed, the thickness of ingate, pouring temperature of liquid metal, the mould structure and the control methods of the mould temperature on the quality of die casting support bracket were discussed. The results show that the support bracket exhibits acceptable quality with low injection speed of 0.25 m/s and high injection speed of 0.5 m/s, thickness of ingate of 5.2 mm as well as pouring temperature of 680＂～69. Through modifying die casting die structure and adopting the sequential solidification mould temperature, the support bracket ca be treated by T6 heat treatment, improving greatly the performance of the die castings.
出处
《特种铸造及有色合金》
CAS
CSCD
北大核心
2013年第3期246-248,共3页
Special Casting & Nonferrous Alloys
关键词
铝合金
超低速压铸
汽车发动机盖罩
Aluminum Alloy
Ultra-Low-Speed Die Casting
Automobile Engine Cap
