磁场烧结WC-Co系硬质合金的研究
来源期刊:中南大学学报(自然科学版)1987年第2期
论文作者:张达明 周洛三
文章页码:163 - 170
关键词:硬质合金; 钴; 碳化钨; 磁场; 活化烧结; 晶粒取向; 显微组织(金相学); 抗弯强度; 孔隙度; 磁场烧结
Key words:cemented carbides; cobalt; tungsten carbide; magnetic field; activated sintering; grain orientation; micro-structure (metallography); bending strength; porosity Free terms: sintering in a magnetic field
摘 要:匀强磁场中烧结硬质合金是粉末冶金工艺一项新技术.研究结果表明,该技术是提高硬质合金质量、改善合金组织结构有效的新方法.在磁场中烧结WC-10、6%Co合金,比之无磁场烧结,强度(σvb提高20%,孔隙度降至0.02%以下,WC结晶取向(系数)增加4倍,钴的β-Co(f.c.c)成份增加了10倍以上,宏观、微观组织结构发生明显变化.
Abstract: The sintering of cemented carbide in a homogeneous and strong magnetic field is a new technique in technology of powder metallurgy. The results of the research have verified: The technique is a new effective method for improving the quality and structure of cemented carbides. WC-(10- 6)%Co alloy sintered in a magnetic field has a bending strength(σbb) 20% higher, oriented WC crystal (ratio) three itmes higher and β-Co (f. c. c) content ten times higher than those of the alloy sintered without using magnetic field. Its porosity is <0. 020% (vol.).Substantial changes are observed both in its macrostructure and microstructure.