WC-Co硬质合金中粘结相的马氏体相变

来源期刊：中南大学学报(自然科学版)1987年第6期

论文作者：李健纯 吴惕言 任山 石怀英

文章页码：649 - 652

关键词：硬质合金； 碳化钨； 钴； 时效； 周期性载荷； 压应力； 马氏体转变； X射线衍射分析； 透射电子显微术；粘结相

Key words：cemented carbides； tungsten carbide； cobalt； aging； cyclic load； compressive stress； martensitic transformation； X-ray diffraction analysis； transmission electron microscopy (TEM)；binder phase

摘    要：采用了X射线和透射电镜对WC-Co硬质合金中粘结相的相变进行了研究.随着750℃温度下保温时间的延长,不断发生面心立方钴向六方钴的马氏体相变.在试样上加载脉动压应力能够促进相变的发生.在750℃进行时效能够改变钴相的马氏体形貌.

Abstract: Martensitic transformation in the binder of a WC-Co cemented carbide was investigated by means of X-ray diffraction and transmission electron microscope. The trasformation of fcc to hcp structure in cobalt phase increased with increasing aging time at 750℃. The transformation process was accelerated by fluctuating compressive loading. The morphology of martensitic plates induced by stress was alternated by aging before transformation.