提高AlSi7Mg合金导电性的研究  

Study on Improvement of AlSi7Mg Alloy Conductivity

作　　者：侯峻岭[1] 葛毓立[2] 宋鸿武[1] 于海朋[1] 

机构地区：[1]沈阳工业大学材料科学与工程学院,辽宁沈阳110023 [2]大连大学,辽宁大连116000

出　　处：《铸造》2006年第6期572-574,共3页Foundry

摘　　要：加入1%的RE可同时提高热处理后AlSi7Mg合金的电导率和抗拉强度。在添加RE的基础上进行硼化处理可以进一步提高合金的电导率,但抗拉强度下降。当RE含量为1.0%、B为0.07%、热处理工艺为520±5℃×4h+180℃×6h时,合金电导率达28S/M、抗拉强度为244.1MPa。According to the demand on conductivity of AlSi7Mg alloy from high-voltage electrical apparatus, study on improvement of AlSi7Mg alloy conductivity was carried out in this paper. The effects of alloying elements RE, B and aging temperature on cast AISi7Mg alloy conductivity and mechanical property were studied. The result shows that the addition of 1% RE can increase the conductivity and tensile strength well; On the basis of 1% RE addition, B addition can increase conductivity further, however it causes decrease of tensile strength. Increasing aging temperature improves conductivity visibly and make the tensile strength decrease; It can finally conclude that with the content of RE, B 1% and 0.07% respectively, the conductivity of AlSi7Mg alloy could be 28S/M, meantime with the tensile strength of 244.1MPa after 520℃ 5 4h 180℃ 6h heat treatment.

关 键 词：ALSI7MG 导电性 力学性能 时效温度 

分 类 号：TG113.224[金属学及工艺—物理冶金]