Al-Si系铸造合金时效强化研究进展  

Research Progress on Aging Strengthening of Al-Si Cast Alloys

作　　者：张鸣鹤 王东涛 长海博文 伍复发[1] ZHANG Minghe;WANG Dongtao;HIEOMIi Nagaumi;WU Fufa(School of Materials Science and Engineering,Liaoning University of Technology,Jinzhou 121001,China;High-performance Metal Structural Materials Research Institute,Soochow University,Suzhou 215000,China)

机构地区：[1]辽宁工业大学材料科学与工程学院,辽宁锦州121001 [2]苏州大学高性能金属结构材料研究院,江苏苏州215000

出　　处：《热加工工艺》2024年第24期11-16,21,共7页Hot Working Technology

基　　金：国家自然科学基金资助项目(51971106);国家自然科学基金青年基金项目(52004168);外国资深学者研究基金项目(52150710544)。

摘　　要：Al-Si系铸造铝合金因其较好的铸造性能在汽车上广泛应用。为了进一步提高Al-Si铸造合金的强韧性,一般主要采用T6(固溶+时效)热处理的方式,而其中的时效处理十分关键。时效硬化过程异常复杂,合金成分、时效参数以及微量元素的引入都会对时效强化的效果产生影响。归纳总结了Al-Si-Cu、Al-Si-Mg以及Al-Si-Cu-Mg合金复杂的沉淀序列,分析了微量元素对时效析出行为的影响,最后指出了目前所面临的挑战以及未来的发展趋势。Al-Si cast aluminum alloys are widely used in automobile industries because of its good castability.In order to further improve the strength and ductility of Al-Si cast alloys,the way of T6(solution+aging)heat treatment is generally adopted,among which aging treatment is very important.Aging hardening process is very complex,alloys composition,aging parameters and the addition of trace elements affect the effect of aging strengthening.This paper mainly summarized the complex precipitation sequence of Al-Si-Cu,Al-Si-Mg and Al-Si-Cu-Mg alloys,and analyzed the influence of trace elements on aging precipitation behavior.Finally,the present challenges and future trends were pointed out.

关 键 词：时效强化 微量元素 沉淀析出 Al-Si铸造铝合金 

分 类 号：TG166.3[金属学及工艺—热处理]