一种新型高强韧铸造铝硅合金(ZL120)热处理工艺的研究  

Research on heat treatment cycle of a new type of high strength and toughness cast Al-Si alloy

作　　者：谭平[1] 杨大壮[1] 鞠治刚[1] 钱翰城[1] 

机构地区：[1]重庆大学,重庆400044

出　　处：《材料科学与工艺》1999年第S1期241-244,共4页Materials Science and Technology

摘　　要：对一种新型高强韧铸造铝硅合金 (暂名ZL1 2 0 )的T6热处理工艺进行了研究 .对固溶温度Ts、固溶时间ts、时效温度Ta和时效时间ta进行三水平正交试验 ,并测试了该合金在对应处理状态下的力学性能 ,然后根据此结果再进行验证性试验 .结果表明 ,改变这四个参数可得到一系列的性能组合 ,例如 ,热处理工艺为 5 2 0℃× 1 6h+ 60℃水冷 + 1 70℃ × 8h时 ,可获得抗拉强度σb ≥ 40 0MPa和延伸率δ5 ≥ 3 %的力学性能 .The T 6 heat treatment cycle of a new type of high strength and toughness cast Al-Si alloy (called ZL120 temporarily) was studied. Ortho experiments were carried out by varying solution temperature T s , solution time t s , ageing temperature T a  and ageing time t a  in three levels, and the mechanical properties were also tested in the corresponding heat treatment condition. Then a series of validating experiments were done according to the result of ortho experiment. The tests show that a set of mechanical properties can be obtained by changing these four parameters. For example, the tensile strength σ b  of the alloy can be gained more than 400 MPa and elongation δ 5 exceeds 3% when the heat treatment cycle is in the condition of 520 ℃×16 h+60 ℃ water cooling +170 ℃×8 h.

关 键 词：铸造铝硅合金 高强韧性 T₆处理 力学性能 

分 类 号：TG166.3[金属学及工艺—热处理]