W-Cu粉末温压成形的研究  

Warm Compaction of Tungsten-Copper Powder

作　　者：程继贵[1] 蔡艳波[1] 宋鹏[1] 万磊[1] 

机构地区：[1]合肥工业大学,合肥230009

出　　处：《中国机械工程》2009年第17期2123-2126,共4页China Mechanical Engineering

摘　　要：采用新型温压黏结剂对W-Cu粉末(Cu的质量分数为20%)进行了温压成形实验。研究了温压温度、压力、原料粉末粒度对温压压坯密度的影响,并将其与冷压成形压坯进行了对比。结果表明:与冷压相比,温压能明显提高W-Cu粉末压坯的密度,170℃下温压压坯的密度为10.68g/cm3,比冷压压坯的密度提高了0.55g/cm3;在相同的压制压力下,采用较细Cu粉末温压W-Cu压坯的密度明显高于使用较粗Cu粉末的压坯密度。温压W-Cu烧结体的密度高于冷压压坯烧结体的密度。温压可以改善W-Cu烧结体的性能和微观组织。W--20wt%Cu powder was warm compacted with a new binder. Effects of compacting temperature, pressure and particle size of the starting powder on green density of the warm pressed W --Cu compacts were investigated,and compared with those of cold compaction. The results show that warm compaction effectively increases green density of the W--Cu compacts. A maximum green density of 10. 68g/cm^3 is obtained for W-- Cu compacts pressed at 170℃ and 400MPa, which is 0.55 g/cm^3 higher than that of cold compaction. The particle size of the starting Cu powder also has an obvious influence on the green density of W--Cu compacts. The warm pressed W--Cu compacts show higher sintered density than the cold pressed compacts. Furthermore, sintered W--Cu materials from the warm pressed W--Cu compacts have improved microstructure and good physical and mechanical properties.

关 键 词：钨铜材料 温压成形 压坯密度 压制方程 显微组织 

分 类 号：TF124.3[冶金工程—粉末冶金]