铸造技术2017，Vol.38Issue(6)：1283-1287,5.DOI:10.16410/j.issn1000-8365.2017.06.007
锰含量对近共晶铝硅铜锰合金组织与耐热性的影响
Effect of Mn Content on Microstructure and Heat-resistance of Near Eutectic Al-Si-Mn-Cu Alloy
摘要
Abstract
Effect of Mn content on the microstructure and heat-resistance of near eutectic Al-12％ Si-4％Cu-x％Mn alloys was investigated by microstructure observation and high temperature tensile test.The results show that,with the increase of Mn content,the amount of Al15Mn3Si2 phase in as-cast microstructure increases,and the morphology of the primary Al15Mn3Si2 phase changes from small block or undeveloped dendrite to developed dendrite or slender rod.And it is found that the alloys with Mn addition,S2(0.8％Mn),S3(1.2％Mn) and S4(1.6％Mn) have more superior high temperature strength than the base alloy S1 without Mn addition,indicating that inducing Al15Mn3Si2 phase in Al-Si-Cu base alloy is in favor of the considerable improvement of the high temperature strength.However,S5 (2.0％Mn) alloy has a lower high temperature strength than that of S1 alloy due to the developed dendritic or slender rod-like primary Al15Mn3Si2 phase.关键词
铝硅铜锰合金/显微组织/耐热性/锰含量Key words
Al-Si-Cu-Mn alloy/microstructure/heat resistance/manganese content分类
矿业与冶金引用本文复制引用
廖恒成,胡以云,何志成,唐云逸,李广敬..锰含量对近共晶铝硅铜锰合金组织与耐热性的影响[J].铸造技术,2017,38(6):1283-1287,5.基金项目
江苏省先进金属材料高技术重点实验室创新科研课题资助项目(BM2007204) （BM2007204）
东南大学基本科研业务费科学研究基金资助项目(2242016K40011) （2242016K40011）
