一、概述一般来讲,铸造铝合金金属型铸造是不进行变质处理的。因为金属型铸造冷却速度较快,限制了晶粒的长大,可以获得足够细化的结晶晶粒,从而保证了铸件的机械件能要求,所以生产中往往不进行变质处理。根据历年生产的ZL-102合金金属型铸件生产所积累数据, First, an overview In general, cast aluminum alloy casting is not metamorphic treatment. Because of the rapid cooling of the metal casting, limiting the growth of the grain, you can get enough grain refinement of the crystal, so as to ensure that the castings of mechanical requirements, so the production is often not metamorphic. According to the calendar year production of ZL-102 alloy metal castings accumulated data,