摘要
以7075系高强度铝合金挤压材为研究对象,对比合金的力学性能(强度、韧性、断裂韧性)、微观组织,并重点研究了其固溶处理后的双级时效热处理工艺。结果表明,7075挤压材采用适宜的双级时效热处理工艺后具有良好的综合性能,其抗剥落腐蚀性能优于T6单级人工时效状态的性能,在保证强度满足设计要求的前提下,提高了7075型材的抗应力腐蚀性能。
7075 series high strength aluminum alloy was taken as the research object, and the mechanical properties （strength, ductility and fracture ductility） and microstructure were compared. The heat-treatment technics of double-grade aging after solution treatment was researched. The results show that after double-grade aging heat-treatment, 7075 extrusion has good mechanical properties, whose exfoliation-corrosion-resistance property is better than those after T6 single-grade artifical aging, and stress-corrosion-resistance property of the 7075 extrusion is improved when the strength meets the design requirement.
出处
《热加工工艺》
CSCD
北大核心
2013年第12期190-191,196,共3页
Hot Working Technology
基金
河南省第八批重点学科"机械制造及其自动化"资助项目(2012SJGLX289)
关键词
高强度铝合金
微观组织
固溶处理
双级时效
high strength aluminum alloy
microstructure
solution treatment
double-grade aging
