热处理对Ti_3Al基合金板材拉伸性能与微观组织的影响  

Effect of heat treatment on tensile properties and microstructures of Ti_3Al based alloy sheet

作　　者：曹京霞[1] 何书林[2] 石卫民[2] 王宏武[2] 王新[2] 

机构地区：[1]北京航空材料研究院,北京100095 [2]宝鸡钛业股份有限公司,宝鸡721014

出　　处：《中国有色金属学报》2010年第B10期207-210,共4页The Chinese Journal of Nonferrous Metals

摘　　要：研究固溶温度、时效温度以及多重时效处理对Ti-24Al-15Nb-1Mo合金热轧板材拉伸性能的影响,对不同热处理工艺下板材的微观组织和拉伸断口形貌进行观察。结果表明:当固溶处理温度从990℃升高到1010℃时,Ti-24Al-15Nb-1Mo合金热轧板材的室、高温强度均有所提高,塑性略有降低;当时效温度从815℃升高到850℃时,板材的室温和高温强度降低,塑性变化不明显;Ti-24Al-15Nb-1Mo合金热轧板材经990℃固溶处理后再进行多次时效处理,其拉伸性能变化不明显;增加时效次数,拉伸强度略微降低。The effects of solution treatment temperature, aging treatment temperature, multiple aging treatments on the tensile properties of Ti-24Al-15Nb-lMo alloy hot-rolled sheet were studied. The microstructure and tensile fracture morphologies with different heat treatment conditions were observed by SEM. The results show that the tensile strength of Ti-24Al-15Nb-lMo alloy hot-rolled sheet is improved, but the tensile ductility decreases slightly both at room and elevate temperature with the increase of solution temperature from 990℃ to 1 010 ℃. The tensile strength decreases with aging temperature increasing from 815℃ to 850 ℃, but the tensile ductility does not change obviously. No significant differences of tensile properties are observed after solution treatment and multiple aging treatments. Additional aging treatments results in slightly decrease of tensile strength.

关 键 词：TI3AL基合金 板材 拉伸性能 微观组织 

分 类 号：TG113.1[金属学及工艺—物理冶金] TG113.25[金属学及工艺—金属学]