一次退火冷却方式对TC25钛合金锻件组织与性能的影响  

Effect of first annealing cooling method on microstructure and properties of TC25 titanium alloy forgings

作　　者：肖挺 马斌 宣航 Xiao Ting;Ma Bin;Xuan Hang(Shaanxi Hong Yuan Aviation Forging Co.,Ltd.,Sanyuan Shaanxi 713801,China)

机构地区：[1]陕西宏远航空锻造有限责任公司,陕西三原713801

出　　处：《金属热处理》2024年第10期118-120,共3页Heat Treatment of Metals

摘　　要：对β相区锻造的TC25钛合金进行(T_(β)-40)℃+540℃双重退火处理,研究了一次退火冷却方式(箱冷、空冷、风冷)对TC25钛合金锻件组织和性能的影响。结果表明,不同一次退火冷却方式下,锻件合金组织均为片状α相和转变β相组成的网篮组织。随冷却速率的增大,α相集束尺寸减小,合金强度增大,塑性、冲击性能降低。一次退火冷却方式为空冷时,TC25钛合金锻件具有较好的室温和高温强韧性匹配。TC25 titanium alloy forged in theβphase region was subjected to double annealing treatment at(T_(β)-40)℃+540℃,and the effect of first annealing cooling methods(box cooling,air cooling,forced air cooling)on the microstructure and properties of the TC25 titanium alloy forgings was studied.The results show that the microstructure of the alloy forgings is basket weave consisting of lamellarαphase andβtransformed structure under different first annealing cooling methods.As the cooling rate increases,the size of lamellarαphase reduces,in the meantime the tensile properties improve,but plasticity and impact properties decrease.The TC25 titanium alloy forgings have good room temperature and high temperature strength and toughness matching under air cooling.

关 键 词：TC25钛合金 双重退火 一次退火冷却方式 显微组织 力学性能 

分 类 号：TG156.21[金属学及工艺—热处理]