论文部分内容阅读
目前在硬质合金领域,钴粉是硬质合金最佳的粘结剂,钴粉性能对合金性能有一定的影响,但研究钴粉性能对硬质合金性能及结构影响的论文较少。实验选取了从0.78～4.61μm不同粒度级别的钴粉,按YF06合金牌号配料,从压坯压力、压坯中钴粉分布以及合金的物理性能和金相组织结构等方面探讨了钴粉粒度对超细硬质合金性能及结构的影响。结果表明:随着钴粉粒度增粗,压坯的压制压力增大,但钴粉粒度对超细混合料压坯中的整体钴分布影响不明显;粒度1.0～1.5μm钴粉比其他粒度级别的钴粉制备的超细硬质合金的整体物理性能更佳;钴粉粒度对超细硬质合金的组织结构也有一定的影响,大于3μm的粗钴粉容易造成超细合金中出现钴池,钴粉太细有则可能造成钴相分布不均。
At present, in the field of cemented carbide, cobalt powder is the best binder of cemented carbide, and the properties of cobalt powder have a certain influence on the properties of the alloy. However, there are few papers on the effects of cobalt powder on the properties and structure of cemented carbide. Experiments were selected from 0.78 ~ 4.61μm different particle size grade cobalt powder, according to the YF06 alloy grade ingredients, from the compact pressure, the distribution of cobalt powder in the green compact and the physical properties and microstructure and other aspects of the cobalt particle size Effect of Ultrafine Cemented Carbide Performance and Structure. The results show that with the increase of cobalt particle size, the compaction pressure of the green compact increases, but the effect of cobalt particle size on the overall cobalt distribution in the ultrafine compacts is insignificant. The particle size of 1.0 ~ Cobalt powder prepared better overall physical properties of ultrafine carbide; cobalt particle size on the microstructure of ultrafine cemented carbide also have a certain impact, more than 3μm coarse cobalt powder is likely to cause ultrafine alloy cobalt pool, Cobalt powder too fine may cause uneven distribution of cobalt.