摘要
采用双螺杆机械搅拌方式制备半固态浆料;研究了AZ91D镁合金半固态浆料的流变压铸成形工艺。结果表明:压射压力在40～50MPa,压射充型速度在10～15m/s内,固相率在10%～60%的浆料都能流变压铸成薄壁圆形铸件;半固态流变压铸成形比液态压铸成形的强度、伸长率分别提高37%、44%,并可施以热处理,进一步提高性能,易于实现"净近成形"。
With two-screw stirring method, rheoforming Die casting of AZ91D semi-solid slurry was investigated. The results indicated that the injection pressure in 40～50 MPa, the gate velocity in 10～15 m/s, the solid volume fraction of the slurry in 10%～60 %,the thin-wall disc casting can be rheoformed by die casting; The tensile strength and elongation of alloy by rheoforming die casting were 37% and 44% higher respectively than that by liquid die casting. Furthermore, the casting formed by semi-solid rheoforming die casting can be carried heat treatment, with 'net-shape ' productive.
出处
《热加工工艺》
CSCD
北大核心
2004年第2期41-42,共2页
Hot Working Technology
基金
湖北省重点科技计划资助项目(20002P0304)
关键词
半固态
镁合金
流变压铸
semi-solid process
magnesium alloy
rheoforming die casting
