论文部分内容阅读
硬质合金的碳含量在WC晶粒的生长方面扮演着重要的角色。众所周知,含碳含量低的WC-Co硬质合金因为粘结相中的W浓度很高从而能够有效抑制WC的粗化。然而,目前对这种现象的形成机理还不是很清楚。德国Element Six Hard Materials,Element Six GmbH的I.Konyashin等人从活化能的角度研究液相烧结中WC粗化机理。他们用超粗WC粉末和10wt%Co粉混合,再加入钨粉或炭黑调节碳含量,经充分球磨并烧
Carbide carbon content plays an important role in the growth of WC grains. It is well-known that the WC-Co cemented carbide having a low carbon content can effectively suppress the coarsening of WC because the W concentration in the binder phase is high. However, the mechanism of formation of this phenomenon is not yet clear. I. Konyashin et al., Element Six Hard Materials, Element Six GmbH, Germany, studied the mechanism of WC coarsening in liquid phase sintering from the viewpoint of activation energy. They use super-coarse WC powder mixed with 10wt% Co powder, and then add tungsten powder or carbon black to adjust the carbon content, after full milling and burning