热处理对TC18钛合金丝显微组织与力学性能的影响  

Effect of Heat Treatment on the Microstructure and Properties of TC18 Titanium Alloy Wire

作　　者：张英明[1] 段启辉[1] 韩明臣[1] 倪沛彤[1] 郭金明[1] 曾光[1] 朱梅生[1] 董亚军[1] 

机构地区：[1]西北有色金属研究院稀有金属材料加工国家工程研究中心,陕西西安710016

出　　处：《钛工业进展》2011年第2期23-25,共3页Titanium Industry Progress

摘　　要：研究了热处理对TC18钛合金丝材显微组织与力学性能的影响。研究结果表明,对于多道次热拉2.0 mm丝材,随着退火温度由760℃升高至820℃,显微组织明显发生了再结晶和晶粒长大过程,并且α相含量显著减少,β相含量显著增多。随着温度的升高,抗拉强度呈明显下降趋势,由760℃时的1 110 MPa下降到820℃时的970MPa。在760℃退火时,保温时间由0.5 h延长到1.5 h,丝材的显微组织晶粒略有长大,力学性能略有降低。The effect of heat treatment on the microstructure and properties of TC18 titanium alloy wire was studied.The results show that the grains of the hot drawed wire recrystallize and grow obviously,the amount of α phase decreases and the amount of the β phase increases,the tensile strength decreases from 1 110 MPa to 970 MPa with the temperature rises from 760 ℃ to 820 ℃.At 760 ℃,with increasing heat treatment time from 0.5 h to 1.5 h,the grains of TC18 wire grows appreciably,and the tensile strength decreases appreciably.

关 键 词：TC18 钛合金丝 显微组织 力学性能 

分 类 号：TG166.5[金属学及工艺—热处理]