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1 钢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

Table 1 Relationship between average size of primary Si and undercooling, faihui temperature, cooling rate for steel mold cooling alloys

Casting thickness of steel mold/mm	Cooling rate /℃·s^-1	Faihui temperature /℃	Undercooling /K	Average size of primary Si/μm
20	18.3	707	29	33.5
15	24.5	688	38	22.8
10	38.1	665	52	17.6
5	73.2	636	70	12.2