热处理对TC21合金大规格棒材组织和性能的影响  

Effect of Heat Treatment on Microstructures and Mechanical Properties of TC21 Alloy Large Bar

作　　者：雷文光[1] 毛小南[1] 侯智敏[1] 卢亚峰[1] 曲恒磊 周义刚[3] 奚正平[1] 

机构地区：[1]西北有色金属研究院,陕西西安710016 [2]西部金属材料有限公司,陕西西安710065 [3]西北工业大学,陕西西安710072

出　　处：《钛工业进展》2010年第1期28-31,共4页Titanium Industry Progress

基　　金：国家科技支撑计划项目(2007BAE07B01;2007BAE07B03);973计划项目(2007CB613807)

摘　　要：研究了不同热处理制度对TC21合金380 mm大规格棒材显微组织和力学性能的影响。结果表明,固溶温度影响初生α相含量以及形貌尺寸,固溶时间对显微组织没有显著的影响;冷却速度影响次生α相含量及尺寸,且对合金强度和塑性产生较大的影响。在890℃×2 h+FC固溶处理后进行610℃×4 h+AC时效处理,可使合金的强度和塑性得到良好的匹配。The effects of various heat treatments on the microstructures and mechanical properties of TC21 titanium alloy large bar were investigated. The results show that the solution temperature affects the content and dimension of primary a phase, but has no obvious effects on the microstruetures. In addition, the cooling rate has influence on the grain size and the content of secondary α phase, and also has significant impact on the strength and plasticity of the alloy. It will enable good matching of strength and plasticity of the TC21 titanium alloy by choosing a suitable cooling rate.

关 键 词：TC21合金 热处理 显微组织 力学性能 

分 类 号：TG166[金属学及工艺—热处理]