轧制变形对Ti-5322板材组织与性能的影响  

Effect of Rolling Deformation on Microstructure and Properties of Ti-5322 Sheet

作　　者：葛鹏[1] 周伟[1] 毛小南[1] 戚运莲[1] 

机构地区：[1]西北有色金属研究院,西安710016

出　　处：《材料工程》2009年第S1期154-157,162,共5页Journal of Materials Engineering

基　　金：国家重点基础研究发展计划项目(2007CB613805);国家高技术研究发展计划项目(2006AA03A215)

摘　　要：Ti-5322是一种低成本的高强钛合金。本工作研究了β温区开坯的Ti-5322钛合金在α+β相区经不同变形量轧制板材后的组织及拉伸性能。显微组织的分析表明,当成品轧制变形量在50%时,合金板材呈现为具有连续晶界的网篮结构;当轧制变形量为75%时,合金板材呈现为包含球状及棒状α相组成的双态组织,晶界不连续。热处理后的拉伸性能测试结果显示,较大的轧制变形量有利于提高合金板材的强度与塑性的匹配。Ti-5322 is a low cost titanium alloy with high strengthening effect.The microstructure and properties of Ti-5322 alloy sheet by rolling in alpha and beta region after blooming in beta region were investigated.The analysis of microstructure show that,when the rolling deformation was controlled at 50%,the sheet of alloy exhibits the basketwave structure with continuous grainboundary alpha;while the deformation was 75%,the sheet exhibit bimodal structure with spherical or calvate alpha,and the grain boundary become discontinuous.The testing results of tensile properties of the sheet after heat treatment show that the relatively high deformation is beneficial for improving the match of strength and ductility.

关 键 词：钛合金 变形量 显微组织 拉伸性能 

分 类 号：TG146.23[一般工业技术—材料科学与工程]