摘要
研究了一种新型Al-Mg-Si-Cu合金热处理工艺参数对其力学性能的影响。经微合金化、熔炼铸造和挤压加工后的合金进行不同固溶、时效延迟和时效处理,并对热处理工艺进行了优化。用金相显微镜、维氏硬度计、扫描电镜及电子万能试验机对合金微观组织和力学性能进行检测分析。结果表明,Al-0.41Mg-0.36Si-1.0Cu合金的过烧敏感温度为620℃,在(520～580)℃×(40～120)min范围内固溶处理后综合性能较佳。合金最佳热处理制度为520℃×(40～120)min固溶,然后165℃×10 h时效。Al-0.41Mg-0.36Si-1.0Cu合金固溶处理后时效延迟时间对硬度的影响较6082合金小,延迟时间应控制在3 h之内。
Effects of heat treatment on mechanical properties of Al-Mg-Si-Cu alloy were studied.The heat treatment experiments including solution,aging delay and artificial aging were carried out on the microalloyed aluminum alloy after casting and extrusion,and the heat treatment process was optimized.Microstructure and mechanical properties of the alloy were analyzed with optical microscope,Vickers hardness tester and electronic testing machine.The results indicate that the overburning sensitive temperature of Al-Mg-Si-Cu alloy is 620 ℃,and a preferable comprehensive mechanical property of the alloy can be obtained when solution treated at 520-580 ℃ for 40-120 min.The best heat treatment process of the alloy is 520 ℃×（40-120） min solution ＋165 ℃×10 h aging.The aging delay time after solution has a less effect on the Al-Mg-Si-Cu alloy than the 6082 alloy,but it should be controlled within 3 h.
出处
《金属热处理》
CAS
CSCD
北大核心
2011年第5期97-102,共6页
Heat Treatment of Metals
基金
长沙市科技成果产业化资金专项(K0902002-11)
