添加微量TiC对制备细晶粒钨合金组织的影响  

Effect of Trace Ti C Addition on Microstructure of Ultra-fine Grained Tungsten Alloy

作　　者：荆鹏[1] 黄愿平[1] 李增峰[1] 刘海彦[1] 杨广宇[1] 刘楠[1] 李纲[1] 迟煜頔[1] 

机构地区：[1]西北有色金属研究院金属多孔材料国家重点实验室,陕西西安710016

出　　处：《热加工工艺》2014年第20期63-65,共3页Hot Working Technology

摘　　要：以纳米级Ti C和商用W粉为原料,采用放电等离子烧结法制备细晶粒钨合金,研究了Ti C粉末的添加量对细晶钨合金组织的影响。结果表明,引入的Ti C弥散分布于钨晶界上,阻碍了烧结过程中W颗粒的聚集长大,起到细化钨晶粒的作用。随Ti C含量提高,该种细化作用越明显,且密度也有所增加;当Ti C添加量为0.5wt%时,获得了致密度高达97%,而晶粒尺寸仅为5μm的细晶粒钨合金。Taking commercial tungsten powder as raw materials and nanosized TiC as additive ultra-fine grained tungsten alloy fabricated by SPS method, the effects of TiC content on the microstructure of the alloy were studied. The results show that nanometer TiC particles distributing in grain boundary can not only restrain the grain growth during SPS sintering process evidently, but also improve the sintering density of W alloy obviously. The W alloy particles is getting finer with the increase of the amount of TiC. When the additive content of TiC is 0.5wt% , the compactness of W alloy can reach 97% and the grain size is only 5 μm.

关 键 词：TIC 钨合金 SPS 弥散强化 晶粒细化 

分 类 号：TG113.11[金属学及工艺—物理冶金]