WC-高碳铬铸铁铸渗层耐磨性与显微结构的研究

A Study on Wear Resistance and Microstructure of Cast-Penetrated Layer of WC-High Carbon Chromium Cast Iron

在ＭＭ２００磨损试验机上研究了铸渗层的抗磨粒磨损性能，利用透射电镜研究了铸渗层的组织结 构。研究结果表明，铸渗层的耐磨性比淬火态４５钢提高３倍，比ＱＴ６００－３提高４倍，渗层中块状颗粒ＷＣ 和（Ｃｒ，Ｆｅ）_７Ｃ_３片状颗粒结合牢固，且（Ｃｒ，Ｆｅ）_７Ｃ_３颗粒中有孪晶，ＷＣ颗粒中有位错。

The wear resistance and microstructure of the cast-penetrated layer wereinvestigated.The result showed that its wear-resistance was increased by three times comparedwith that of quenched #45 steel,and by four times compared with that of QT600-3 nodulariron.It was observed in the penetrated layer that the lump-shaped WC grains and the flakeshaped (Cr,Fe)_7C_3 strongly combined, and there were twins in the (Cr,Fe)_7C_3 grains and dislocations in the WC grains.