A356合金控制凝固法工艺参数的优化  

Optimization on Processing Parameters of Controlled Crystallization

作　　者：胥锴[1] 刘政[1] 刘萍[1] 

机构地区：[1]江西理工大学材料与化学工程学院,江西赣州341000

出　　处：《铸造》2006年第10期1075-1078,共4页Foundry

摘　　要：采用正交试验法,研究了A356铝合金控制凝固法工艺参数对显微组织的影响。研究结果表明,冷却强度是晶粒细化的最主要因素,极差为57.946,可信度达到99%,其次是保温时间与浇注温度。最佳工艺参数为:浇注温度625℃,保温时间10 min,冷却强度为金属型水淬。其平均晶粒尺寸为34.92μm。Effects of process parameters on microstructure of controlled crystallization method of A356 alloy are studied by using orthogonal arrays design in this paper. The results indicate, the main factor for grain refinement is cooling intensity, its polar odds is 57.946 and reliability is 99%, The next facts are preservation time and pouring temperature, The optimized process parameters are as followings： pouring temperature 625 ℃, preservation time 10min, cooling intensity of metal mold by water-quenching method. And average grain sizes are 34.92μm.

关 键 词：A356合金 控制凝固法 正交试验法 等积圆直径 冷却强度 

分 类 号：TG27[金属学及工艺—铸造]