摘要
利用自行设计的单辊剪切 /冷却 (SCR)试验机对LY11合金进行了半固态凝固实验 ,研究了工艺条件对LY11半固态合金组织的影响。结果表明 ,辊 靴间隙宽度的适当范围为 2～ 3mm ;浇注温度影响半固态合金坯料内部晶粒的大小与形状 ,浇注温度在 730～ 75 0℃范围内 ,可获得细小、均匀球状或椭球状晶粒组织 ;冷却方式会影响半固态合金坯料晶粒的大小与分布 ,水冷制得的合金晶粒尺寸比空冷的小 2～ 3个级别 。
A self made single roll shearing/cooling (SCR) machine was used to manufacture semi solid LY11 alloy. Effect of processing factors on the micorstructures were studied. The results show that the optimum gap between roll and shoe varies in 2～3?mm; pouring temperature can affect grain size and its shape of semi solid alloy. When cast at 730～750?℃, fine and even grains with spherical or elliptical structures can be obtained. Cooling style can affect grain size and distribution. Grain size of alloy produced from water cooling is 2～3 level smaller than that from air cooling, but grains produced from air cooling are even.
出处
《中国有色金属学报》
EI
CAS
CSCD
北大核心
2001年第z1期5-8,共4页
The Chinese Journal of Nonferrous Metals
关键词
剪切
半固态合金
浇注温度
冷却
shearing
semi solid alloy
pouring temperature
cooling
