冷速对等温锻造TC25钛合金盘件显微组织和性能的影响  

Influence of Cooling Rate on Microstructure and Properties of Isothermal Forged TC25 Titanium Alloy Disk

作　　者：魏鑫 叶康源 叶俊青 Wei Xin Ye Kangyuan Ye Junqing(AECC Shenyang Liming Aero-engine Co., Ltd., Shenyang 110043, China Guizhou Anda Aviation Forging Co., Ltd., Anshun 561005, China)

机构地区：[1]中国航发沈阳黎明航空发动机有限责任公司,辽宁沈阳110043 [2]贵州安大航空锻造有限责任公司,贵州安顺561005

出　　处：《钛工业进展》2017年第4期26-29,共4页Titanium Industry Progress

基　　金：陕西省科技统筹项目(2012KTZB01-03-04)

摘　　要：研究了TC25钛合金盘件在β相区等温锻造后,不同的冷却速率对显微组织和力学性能的影响。结果表明,锻后空冷得到粗大的片状组织,并有大块的α相出现;锻后水冷可以获得细小、相互交织的网篮组织,未出现明显的块状α相。与空冷相比,β锻造后水冷的盘件室温强度、热暴露后的室温强度以及500℃和550℃的高温强度均有明显提高,塑性基本保持不变或有所提高。可见,TC25钛合金β锻造后水冷是改善强度和塑性的有效方法。The effect of cooling rate on microstructure and alloy disk is studied. The results show that air cooling after The fine and basket phases with no obvious α phase can be mechanical properties of β isothermal forged TC25 titanium forging, blocky α phases precipitate within coarse β grains. obtained after water quenching. Compared with air cooling after forging, tensile strength at room temperature, after thermal exposure and at high temperature （500℃ and 550℃） have improved after water quenching, and the ductility does not decrease but even increases. Hence, it is concluded that water quenching after forging is one of the effective way for improving the strength and ductility of TC25 titanium alloy.

关 键 词：TC25钛合金 Β锻造 冷却速率 力学性能 

分 类 号：TG146.23[一般工业技术—材料科学与工程]