稀土元素钇对粉末冶金制备V-5Cr-5Ti合金微观组织的影响  

Effect of yttrium on microstructure of V-5Cr-5Ti alloys prepared by powder metallurgy

作　　者：程亮[1] 李强[1] 董鲜峰[1] 李启寿[1] 彭丽霞[2] 

机构地区：[1]中国工程物理研究院,绵阳621900 [2]表面物理与化学重点实验室,绵阳621907

出　　处：《粉末冶金材料科学与工程》2015年第1期14-18,共5页Materials Science and Engineering of Powder Metallurgy

摘　　要：采用粉末冶金方法,制备含不同质量分数钇(0%,0.5%,1%,2%)的V-5Cr-5Ti合金。利用金相显微镜、扫描电镜(SEM)和能谱仪(EDS)等分析稀土元素钇对V-5Cr-5Ti合金显微组织的影响。结果表明添加钇能够显著改善钒合金微观组织结构,使晶粒细化;可有效消除粗大富钛条状第二相,而析出尺寸约为3μm的富钇颗粒,富钇颗粒分布于晶粒内部和晶界处,但以晶粒内部为主。V-5Cr-5Ti alloys with various mass fraction of yttrium（0%, 0.5%, 1%, 2%） were prepared by powder metallurgy. In order to analyse the effect of yttrium addition on microstructure of vanadium alloys, techniques of optical microscopy（OM）, scanning electron microscopy（SEM） and energy dispersive X-ray spectrometer（EDS） were applied. Results are as follows： rare-earth yttrium shows great affect on the microstructure of vanadium alloys. The addition of yttrium can refine the grain size, and eliminate the strip sharped Ti-enriched second phases effectively. Instead, yttriumenriched phases with sizes of about three micrometers are formed mostly inside the grains, and also in the grain boundaries.

关 键 词：稀土钇 V-5Cr-5Ti合金 富钇相 微观组织 粉末冶金 

分 类 号：TG146.4[一般工业技术—材料科学与工程]