冷却速率对<strong>Al-20%Si</strong>合金<strong>Si</strong>相形貌及性能的影响

冷却速率对Al-20%Si合金Si相形貌及性能的影响

江峻,黄诗鑫,王连登,张思彬,朱定一

Effect of Cooling Rate on Microstructure Evolution and Mechanical Property of Cast Al-20% Si Alloy

Jun JIANG,Shixin HUANG,Liandeng WANG,Sibin ZHANG,Dingyi ZHU

表2 铜模冷却合金中的初生Si尺寸与过冷度、再辉温度、冷却速率的关系

Casting thickness of copper mold/mm	Cooling rate /℃·s^-1	Faihui temperature /℃	Undercooling /K	Average size of primary Si/μm
20	33.8	670	43	18.3
15	50	656	53	14.9
10	82.6	632	75	10.6
5	211.1	606	96	7.1