摘要
传统压铸法生产的高硅铝合金铸件,容易产生表面疏松、微气孔、"铸巢"等缺陷,降低了压铸件的品质,并会对烤漆、电镀等后续加工产生诸如脱漆、起泡等严重影响,限制了高硅铝合金压铸件在高标准外观要求产品领域中的应用。本文通过对大量压铸件中"铸巢"这一缺陷的研究并详细分析压铸工艺过程,发现使用向脱模剂中添加形核剂的方法可以消除"铸巢",同时细化晶粒、减少微气孔、增加铸件细晶层厚度,从而提高铝合金压铸件表层组织的致密度,并起到了提升铸件气密性的作用。
The traditional method of producing aluminum alloy die-casting caused shrinkage cavity and porosity of surface,such as micro-porosity defects,then made a negative effect to the die-casting.And a serious impact on subsequent processing including paint drying and electroplating etc.could be produced due to these defects.The paper studied on the improvement of the surface quality by adding nucleating agent to release agent in die-casting.While reducing the micro-stomatal and minishing of crystal grain,increasing thickness of fine grain layer and organizations density of die casting surface,enhancing gastightness of the die-casting.
出处
《铸造技术》
CAS
北大核心
2010年第10期1314-1316,共3页
Foundry Technology
关键词
铝合金
铸巢
细晶层
晶粒细化
致密度
Aluminum alloy
Casting nest
Fine grain layer
Grain refinement
Density
