北京科技大学学报2011，Vol.33Issue(4)：462-467,6.
烧结工艺对脱β层梯度硬质合金梯度结构的影响
Effect of sintering procedures on the gradient structure of graded cemented carbides with a cubic carbide-free layer
摘要
Abstract
Graded cemented carbides with a cubic carbide-free layer (CCFL) in the surface were synthesized by one-step sintering. The microstructure, phase composition and element distribution of the graded cemented carbides were investigated by scanning electron microscopy, X-ray diffraction analysis and electron probe microanalyzer, respectively. The typical microstructure of the graded cemented carbides and the effect of sintering procedures on gradient structures in the graded cemented carbides were discussed in detail. It is shown that the depth of CCFL significantly increases with increasing sintering temperature and prolonging holding time, and there exists a linear dependence approximately between the depth of CCFL and the square root of holding time. The depth of CCFL becomes larger at a higher cobalt content, but narrows with increasing Ti(C,N) content for the same sintering procedure.关键词
硬质合金/烧结工艺/梯度结构/微观组织/相组成Key words
cemented carbides/ sintering/ gradient structure/ microstructure/ phase composition分类
矿业与冶金引用本文复制引用
史留勇,刘义敏,张守全,黄继华,赵兴科,张华..烧结工艺对脱β层梯度硬质合金梯度结构的影响[J].北京科技大学学报,2011,33(4):462-467,6.基金项目
国家科技支撑计划资助项目(No.2007BAE05B02) （No.2007BAE05B02）
