细晶钨合金制备工艺的研究  

Preparing process of fine-grain tungsten heavy alloy with high mechanical properties

作　　者：范景莲[1] 汪登龙[1] 刘涛[1] 

机构地区：[1]中南大学粉末冶金国家重点实验室,湖南长沙410083

出　　处：《兵器材料科学与工程》2006年第2期1-5,共5页Ordnance Material Science and Engineering

基　　金：国家"863"项目"细晶钨合金穿甲弹弹芯材料"资助;项目编号为:2002AA305503

摘　　要：研究了添加微量稀土氧化物Y2O3和机械合金化所制备的90W-7Ni-3Fe合金的显微组织与性能。试验采用机械合金化工艺制备含微量稀土氧化物Y2O3的90W-7Ni-3Fe复合粉末,将粉末在1460～1480℃烧结30min,制备最大抗拉强度大于962MPa、延伸率为30.8%、钨晶粒尺寸为8～12μm的细晶高性能90W-7Ni-3Fe合金。研究了稀土氧化物Y2O3对合金性能和显微组织结构特征的影响。The microstructure and properties of 90W-7Ni-3Fe prepared by adding minor rare earth oxide Y2O3 and mechanical alloying were studied. In the experiment, the 90W-TNi-3Fe powder containing Y2O3 was subjected to mechanical alloying to form a composite powder, then the powder was pressed and sintered at 1 460-1 480 ℃ for 30 min, the fine grain tungsten heavy alloy with ideal mechanical properties was obtained, in which the spherical tungsten grain was 8-12 μm, the maximum tensile strength was about 962 MPa, and its elongation was 30.8%. The influences of Y2O3 on the microstructure and properties were discussed.

关 键 词：细晶钨合金 机械合金化 稀土 纳米材料 烧结 

分 类 号：TF125.2[冶金工程—粉末冶金] TG146.4[冶金工程—冶金物理化学]