退火处理对V-5Cr-5Ti合金微观组织和硬度的影响  

Effect of Annealing on the Microstructure and Hardness of V-5Cr-5Ti Alloy

作　　者：黄姝珂[1] 周丹晨[1] 李昌安[1] 李敬民[1] 刘宝[1] 

机构地区：[1]中国工程物理研究院机械制造工艺研究所,四川绵阳621900

出　　处：《材料工程》2011年第3期32-35,共4页Journal of Materials Engineering

基　　金：国家自然科学基金资助(50901069)

摘　　要：研究了拉伸变形后V-5Cr-5Ti合金硬度和微观组织随退火温度的变化,并对微量杂质元素的影响进行了深入分析。在真空炉中进行退火,利用万能实验机和维氏硬度计进行拉伸变形和硬度测试,采用X射线衍射（XRD）分析相结构,扫描电镜（SEM）和光学显微镜（OM）观察微观组织。研究结果表明,拉伸变形后V-5Cr-5Ti合金的硬度明显增加,在700~1000℃范围内退火时,随着温度的升高,硬度逐渐下降,在900℃和1000℃达到最低值;经过1100℃油冷处理后硬度没有降低反而明显升高,并且部分晶粒出现异常长大,微观组织变得不均匀。The variations of hardness and microstructure with annealing temperature of V-5Cr-5Ti alloy,and the effect of minor impurity elements were studied.The annealing was done in vacuum heat treatment furnace.The tensile deform and hardness were tested using universal material testing machine and Vickers hardness tester.The phase structure was identified using X-ray diffraction（XRD）.The microstructure was observed using scanning electronic microscope（SEM） and optical microscope（OM）.The results indicated that the hardness of deformed V-5Cr-5Ti alloy is improved obviously.The hardness decreases with annealing temperature increasing from 700℃ to 1000℃,and reach minimum value at 900℃ and 1000℃.After oil-quenching at 1100℃,the hardness is not descending but to higher value,and the microstructure is non-homogeneous where some grains grow up abnormally.

关 键 词：V-5Cr-5Ti 退火 微观组织 硬度 沉淀相 

分 类 号：TG146.413[一般工业技术—材料科学与工程]