以钨铁和炭黑为原料采用真空烧结反应合成制备了WC铁基耐磨材料,通过XRD、OM、SEM、EDS、硬度计与湿沙橡胶轮式磨损试验机等研究其组织与性能.结果表明:在1250～1450℃的温度区间内进行烧结,均可原位合成WC,同时生成少量Fe3W3C相;原位合成的WC颗粒细小,且弥散分布于基体,而Fe3W3C相随温度的升高而长大;当烧结温度为1350℃时,材料的力学性能最佳,宏观硬度高达56 HRC,磨损质量损失最小,其相对耐磨性为Q235钢的27倍.
The WC reinforced iron matrix wear resistant materials were prepared by vacuum sintering using ferrotungsten and carbon black as raw materials,and microstructure and properties of the materials were studied by means of XRD,OM,SEM,EDS analysis,hardness test and abrasive wear testing.The results show that when sintered at the temperature from 1250 ℃ to 1450 ℃,the WC wear resistant materials can be in-situ synthesized,and a small amount of Fe3W3 C phase are observed.The in-situ synthesized WC particles are fine and dispersed in the matrix,and the amount of Fe3W3C phase increases with the increasing of the sintering temperature.When sintered at 1350 ℃,the mechanical properties of the materials are the best,the macrohardness is up to 56 HRC,the wear mass loss is the least and the relative wear resistance is 27 times that of Q235 steel.
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