W-Ni-Fe高比重合金的SPS烧结行为  

Spark plasma sintering behavior of W-Ni-Fe cemented carbide powders

作　　者：梅雪珍[1] 贾成厂[2] 尹法章[2] 陈黎亮[2] 

机构地区：[1]北京矿冶研究总院金属材料研究所,北京100044 [2]北京科技大学材料科学与工程学院,北京100083

出　　处：《北京科技大学学报》2007年第5期475-478,共4页Journal of University of Science and Technology Beijing

基　　金：国家自然科学基金资助项目(No.50174007)

摘　　要：采用放电等离子烧结(SPS)设备制备了93W-5·6Ni-1·4Fe高比重合金,烧结温度范围为1100～1180℃,保温时间为5min.对不同烧结温度下的样品进行了密度、硬度、抗弯强度等性能测试,采用场发射SEM观察了样品表面形貌及断裂行为.结果表明:采用SPS烧结,可以在较低的温度下实现93W-5·6Ni-1·4Fe高比重合金的固相烧结,使合金致密化,并能有效控制钨晶粒长大,提高材料的硬度、抗弯强度等力学性能.93W-5.6Ni-1.4Fe cemented carbides were sintered by spark plasma sintering method, in which the sintering temperature ranged from 1 100℃ to 1 180℃ and the holding time was 5 min. The properties such as density, hardness and bending strength of the samples sintered at different temperatures were tested, and field spray scanning electron microscopy was used to investigate their appearance and rupture behavior. The results showed that 93W-5.6Ni-1.4Fe cemented carbides with high density were sintered by SPS at low temperature. Besides grain size could be controlled, the hardness and the bending strength could also be improved.

关 键 词：钨合金 放电等离子烧结 烧结性能 力学性能 微观组织 

分 类 号：TF124[冶金工程—粉末冶金]