原位冶金法制备 WC／Ni 复合材料的形貌特性及性能研究

摘要

研究了采用直流电弧原位冶金技术制备 WC ／Ni 复合材料的方法和组织性能。试验结果表明，生成的WC 颗粒在制备的 WC ／Ni 复合材料的底部和顶部中的分布和尺寸都不同，底部分布较少并成散乱分布，尺寸达到100～200μm；顶部分布较多且有序分布，尺寸为10～20μm。基体为 Al0．9 Ni4．22相且硬度整体一致，WC 组织颗粒的宏观形貌为三棱柱，微观则为层片状结构，且其硬度根据所处位置不同而有一定变化，最大值可达到2331.99 HV。%This paper has some researches on the preparation of WC /Ni composite materials with direct current (DC)arc in -suit met-allurgical technology and their structural properties.Experimental results show that the distribution and size of WC particles generated in WC /Ni composite materials are different both at the bottom and the top,less and dispersed with the size of 100 ~200 μm at the bot-tom while more and well -regulated with the size of 10 ~20 μm at the top.The metal matrix is Al0.9 Ni4.22 and has uniform hardness. WC particles have the macroscopic appearance similar to triangular -prism and the micromorphology of lamellar structure whose hard-ness can vary within a certain range according to the position,with the maximal value 2 331.99 HV.