固溶处理对7050铝合金厚板组织和性能的影响  

Effects of solution treatment on microstructure and properties of 7050 aluminum alloy thick plate

作　　者：沈君[1] 

机构地区：[1]东北轻合金有限责任公司,黑龙江哈尔滨150060

出　　处：《金属热处理》2012年第9期119-122,共4页Heat Treatment of Metals

基　　金：国家"十一五"科技支撑课题(2007BAE38B06)

摘　　要：采用差热分析(DSC)、室温拉伸、电导率测试、显微组织观察研究了不同固溶温度和固溶时间对7050铝合金厚板组织和性能的影响。结果表明,试验用合金的过烧温度约为486.3℃;随固溶温度升高,合金电导率下降,强度先升高后下降,热处理温度高于过烧温度后,伸长率迅速下降。在480℃×90 min条件下固溶处理时,T6时效态合金的抗拉强度、屈服强度和伸长率分别达到600 MPa、525 MPa和15.0%。合金适宜的固溶处理制度为480℃×(90～120)min。Effect of solution temperature and time on microstructure and properties of 7050 aluminum alloy thick plate were investigated by DSC test, room temperature tensile test, electrical conductivity measurement and microstructure observation. The results show that the overburnt temperature of the alloy is about 486. 3 ℃. With solution temperature increasing, the electrical ＂conductivity decreases, the ultimate strength first increases and then decreases. When solution temperature is higher than overburnt temperature, the elongation decreases rapidly. After solution treated at 480 ℃ for 90 min, the ultimate tensile strength, yield strength and elongation of the alloy for T6 condition are 600 MPa, 525 MPa and 15.0% , respectively. The reasonable solution process of the alloy is 480 ℃× （90 - 120） rain.

关 键 词：7050铝合金 厚板 固溶处理 显微组织 性能 

分 类 号：TG146.4[一般工业技术—材料科学与工程]