不同成分及热处理态无镍钛基合金的物相组成  

Phase Composition of Nickel Free Titanium Based Alloys with Different Composition and Heat Treatment

作　　者：周正存[1] 朱晓斌 杜洁[1] 严勇健[1] 顾苏怡[1] 杨益飞 ZHOU Zhengcun;ZHU Xiaobin;DU Jie;YAN Yongjian;GU Suyi;YANG Yifei(School of Mechanical and Electronic Engineering,Suzhou Vocational University,Suzhou 215104,China)

机构地区：[1]苏州市职业大学机电工程学院,苏州215104

出　　处：《机械工程材料》2020年第8期27-31,共5页Materials For Mechanical Engineering

基　　金：江苏青蓝工程(科技创新团队)资助项目(201239);苏州市职业大学科研平台资助项目(201804000050);江苏省高校自然科学研究面上项目(19KJD470005);苏州市重点产业技术创新项目(SYG201939)。

摘　　要：采用真空电弧炉熔炼不同成分的Ti-Mo、Ti-Nb系合金,研究了铝、铁、锡、铌、钼等元素对淬火态和退火态合金物相组成的影响。结果表明:随钼含量增加,退火态Ti-Mo合金中α相含量减少,β相含量增加,淬火态Ti-Mo合金中依次形成α′、α″和βM相;铝和锡元素使淬火态Ti-12Mo和Ti-33Nb合金中α″相增加,为α稳定剂;在退火态Ti-12Mo和Ti-33Nb合金中,锡能够抑制β相向ω相的转变,表现出β稳定剂倾向;铝可以使退火态Ti-12Mo合金中α相增加,但在退火态Ti-33Nb合金中却表现出β稳定剂倾向;铁为强β稳定剂,可使Ti-33Nb合金及淬火态Ti-12Mo合金组织中β或βM相增加,但由于退火态Ti-12Mo-2Fe合金中的β相易发生共析分解,其α相有所增加;铌、钼同样为β稳定剂,作用效果比铁的作用效果弱。Ti-Mo and Ti-Nb alloys with different composition were melted by using vacuum arc furnace.The effects of aluminum,iron,tin,niobium and molybdenum elements on the phase composition of quenched and annealed alloys were studied.The results show that with increasing content of molybdenum,theα-phase content in annealed Ti-Mo alloy decreased,theβphase content increased,andα′,α″andβ_M phases were formed sequentially in quenched Ti-Mo alloy.Aluminum and tin elements could increase the content ofαphase in quenched Ti-12Mo and Ti-33Nb alloys,which acted asαstabilizer.In annealed Ti-12Mo and Ti-33Nb alloys,tin could suppress the transformation ofβtoω,showing the tendency ofβstabilizer.Aluminum increasedαphase content in annealed Ti-12Mo alloy,but showed the tendency ofβstabilizer in annealed Ti-33Nb alloy.Iron was a strongβstabilizer,which could increase theβorβ_M phase in Ti-33Nb alloy and quenched Ti-12Mo alloy.However,due to the eutectic decomposition ofβphase,αphase content in annealed Ti-12Mo-2Fe alloy increased.Niobium and molybdenum were alsoβstabilizers,which showed weaker effects than iron.

关 键 词：无镍钛基合金 热处理 物相组成 

分 类 号：TG115.22[金属学及工艺—物理冶金]