摘要
选用3种不同的热处理工艺对2519铝合金板材进行处理,采用测定试样在腐蚀前后力学性能的变化即腐蚀的力学性能指标Kσ和Kδ来评定2519铝合金的应力腐蚀敏感性。结果表明:2519铝合金板材经先高温后低温的双级时效处理(180℃,3h+145℃,24h)后力学性能最好,抗应力腐蚀性能最差;而经形变热处理(20℃,100h+冷加工15%+145℃,21h)后的力学性能较好,抗应力腐蚀性能最好;过时效状态(180℃,30h)下力学性能最差,抗应力腐蚀性能适中。
Three different heat treatment processes were selected for 2519 aluminum alloy plate, the stress corrosion sensitivity was evaluated by difference of mechanical properties between corroded samples and uncorroded samples such as Kσ and Kδ. The results show that the stress corrosion resistance of the alloy is the worst but its mechanical properties are the best at twostage aging state of 180 ℃, 3 h+145 ℃, 24 h; the stress corrosion resistance is the best but the mechanical properties are in the middle of three states at the thermalmechanical treatment state of 20 ℃, 100 h+cool deformation 15%+145 ℃, 21 h; the stress corrosion resistance is in the middle of three states but the mechanical properties are the worst at the state of overaging of 180 ℃, 30 h.
出处
《中国有色金属学报》
EI
CAS
CSCD
北大核心
2003年第4期934-938,共5页
The Chinese Journal of Nonferrous Metals
关键词
铝合金
板材
力学性能
应力腐蚀敏感性
热处理制度
heat treatment
2519 aluminum alloy
mechanical property
stress corrosion sensitivity
