论文部分内容阅读
一、前言 由于铝无同素异构转变现象,工业生产中用热处理方法来提高铸造铝合金的机械性能时,只能采用固溶强化(即淬火)或析出硬化(即淬火十时效)的方法。通常,对能够经固溶和时效强化的合金施以T_6处理,即在铸造后将铸件再经较高温度的长时间加热,然后淬火,使合金元素过饱和固溶,然后人工时效,使析出弥散的强化相。用这种工艺,毛坯需重新加热至高温,并长期保温(一般达10小时或更长),对大批量产品,
I. INTRODUCTION Due to the non-allotropic transformation of aluminum and the heat treatment in industrial production to improve the mechanical properties of the cast aluminum alloy, only the solution hardening (ie, quenching) or precipitation hardening (ie, quenching and ten-aging) . Usually, the alloy can be treated by solution treatment and aging with T_6 treatment, that is, after casting, the casting is heated at a higher temperature for a long time, and then quenched so that alloy elements supersaturated solution, and then artificial aging, precipitation Diffuse enhanced phase. With this process, the blank needs to be reheated to high temperatures and long-term insulation (usually up to 10 hours or longer), for large quantities of products,