放电等离子烧结制备W-9.8Ni-4.2Fe合金的高温压缩性能  

High temperature compression property of W-9.8Ni-4.2Fe alloys fabricated by spark plasma sintering

作　　者：艾璇[1] 李小强[1] 胡可[1] 屈盛官[1] 邵明[1] 

机构地区：[1]华南理工大学国家金属材料近净成形工程技术研究中心,广州510640

出　　处：《粉末冶金材料科学与工程》2012年第4期529-534,共6页Materials Science and Engineering of Powder Metallurgy

基　　金：国家重点基础研究发展计划("973"计划)专项课题(2010CB635104);新世纪优秀人才支持计划资助项目(NCET-10-0364);中央高校基本科研业务费专项资金资助重点项目(2009ZZ0019);国防预研基金项目(8151064101000026)

摘　　要：采用放电等离子烧结法,通过高温压缩性能测试和扫描电镜（SEM）观察,研究粉末制备工艺和烧结温度对W-9.8Ni-4.2Fe合金在800℃下高温压缩性能的影响。结果表明,高能球磨粉末烧结合金的硬度和高温压缩性能均优于混合粉末烧结合金;在1 150℃下球磨粉末烧结合金的压缩强度最高,达到1 150 MPa,但当烧结温度在1 050~1 250℃范围内变化时,烧结合金的压缩应力应变曲线变化并不显著。By SEM analysis method and compression test at 800 ℃ performed on the W-9.8Ni-4.2Fe alloys fabricated by spark plasma sintering, the effects of sintering temperature and powders pretreatment on the high temperature compression property were studied. The results show that, both the hardness and high temperature compression property of the as-sintered alloys from milled powders are superior to those from mixed powders. The alloy from milled powders sintered at 1 150 ℃ has the maximum high temperature compression strength of 1 150 MPa, but in the range of 1 050- 1 250 ℃, the variation of its stress-strain curves is not verv obvious.

关 键 词：W-9.8Ni-4.2Fe 放电等离子烧结 烧结温度 高温压缩 

分 类 号：TF124.5[冶金工程—粉末冶金]