粉末及其组成与细钨粉烧结坯组织均匀性的关系  

THE STRUCTURAL HOMOGENEITY OF SINTERED COMPACT USING FINE TUNGSTEN POWDER

作　　者：张小立[1] 李应泉[1] 殷为宏[1] 

机构地区：[1]西北有色金属研究院

出　　处：《中国钼业》1997年第A00期8-11,共4页China Molybdenum Industry

摘　　要：采用０．５μｍ～２．５μｍ的较细钨粉在１７５０℃烧结均能得到９０％以上的烧结密度。但烧结坯组织分析表明，粉末越细，烧结坯组织均匀性越差；利用粗、细粉末进行搭配后组织均匀性改善，但若两组分粉末活性（粒度）相差过大，则导致微观组织不均匀，形成一团团孔洞较多的细晶组织。A density of 90% could be gotten so long as using fine tungsten powder 0 5 μm～2 5 μm sintered at 1750℃ But metallographic structure showed that the finer of the powder,the worse of the homogeneity of structure;Blending the coarse and fine powder,the homogeneity of structure of sintered compact better However if activity of component of mixtures was quite different,the microstructural homogeneity of sintered compact was bad,in which there were lots of fine grain structure with many cavities

关 键 词：细钨粉烧结 组织 均匀性 粉末 

分 类 号：TF122[冶金工程—粉末冶金]