球磨时间对粗晶钨钴合金WC晶粒尺寸分布与WC邻接度的影响

本文选取钴含量分别为3％、8％、18％、26％的粗晶硬质合金混合料进行球磨,在球磨时间为15、16、17 h时取出混合料制成四组每组3批硬质合金样品,研究球磨时间对粗晶硬质合金WC晶粒尺寸分布及WC邻接度的影响,结果表明,同组粗晶硬质合金的WC晶粒尺寸分布曲线随着球磨时间的增加逐渐向左偏移,分布曲线的右支变得更陡,WC...

Effect of Milling Time on WC Grain Size Distribution and WC Adjacency of Coarse Grained WC-Co Cemented Carbide

In this paper,the coarse-grained cemented carbide mixture with cobalt content of 3%,8%,18% and 26%were selected for ball-milling.When the milling time was 15 h,16 h and 17 h,the mixture was taken out and made into fourgroups of cemented carbide samples with three batches in each group.The effects of milling time on the WC grain sizedistribution and WC adjacency of coarse-grained cemented carbide were studied.The results show that the WC grain sizedistribution curve of the same group of coarse-grained cemented carbides gradually deviates to the left with the increase ofmilling time,the right branch of the distribution curve becomes steeper,and the WC adjacency decreases first and thenincreases.In the same group of samples,the alloy with the slowest change of the percentage of right branch of WC grain sizedistribution curve has the smallest WC adjacency.The characteristics of WC grain size distribution in the alloy with low WCadjacency are explained by the densest filling theory.