Ti-Al-Mo-V-Cr系新型高强耐磨β钛合金热变形与热处理研究  

Study on hot deformation and heat treatment of a novel series of high strength and wear resistanceβtitanium Ti-Al-Mo-V-Cr alloy

作　　者：岳颗 孙迎军 彭力 林崇智 Yue Ke;Sun Yingjun;Peng Li;Lin Chongzhi(Chengdu Advanced Metal Materials Industrial Technolgy Research Institute Co.,Ltd.,Chengdu 610300,Sichuan,China)

机构地区：[1]成都先进金属材料产业技术研究院股份有限公司,四川成都610300

出　　处：《钢铁钒钛》2023年第6期64-69,共6页Iron Steel Vanadium Titanium

摘　　要：以Ti-Al-Mo-V-Cr系高强耐磨新型β钛合金为试验对象,研究了该新型β钛合金在不同变形条件下的热变形行为,分析了热处理工艺对新型β钛合金板材力学性能和显微组织的影响。结果表明,热压缩试验中变形速率越低,变形温度越高,合金热变形抗力就越小;再结晶晶粒数量随变形速率的降低而明显增加,再结晶晶粒尺寸随变形温度的降低而明显减小。热处理试验中采用合适的热处理工艺有效改善了冷轧板材的组织和力学性能,低温时效与高温退火工艺可以使板材的抗拉强度分别达到1686 MPa与1569 MPa,洛氏硬度(HRC)均保持在50以上。Taking high strength and wear resistanceβtitanium Ti-Al-Mo-V-Cr alloy as the research object,the hot deformation behaviors with varying hot working conditions were studied,and the influence of heat treatment on the microstructure and mechanical properties of cold rolled sheet was analyzed.The results are summarized as follows:In the hot compression tests,the flow stress of this alloy decreases with the decreasing strain rate and increasing deformation temperature;the amount of recrystallized grains increases significantly with decreasing strain rate,the size of recrystallized grains diminishes obviously with decreasing deformation temperature.In the heat treatment tests,the microstructure and mechanical properties of cold rolled sheet can be effectively optimized with proper heat treatment process,tensile properties and Rockwell hardness are improved simultaneously by aging at lower temperature or annealing at higher temperature,with the tensile fracture strength of reaching 1686 MPa and1569 MPa,respectively,while keeping the hardness(HRC)over 50 for either heat treatment process.

关 键 词：高强耐磨β钛合金 热变形 热处理 组织演变 再结晶 

分 类 号：TF823[冶金工程—有色金属冶金]