45钢表面双辉等离子渗铝处理

Double-flare plasma aluminizingon 45 steel surface

采用双辉等离子渗铝技术和碳氮共渗技术分别在45钢表面制备出Fe-Al-N和Fe-C-N合金层。分析两合金层表面显微硬度以及物相组成,并观察表面的微观结构、元素分布。结果表明,45钢表面形成的Fe-Al-N合金层表面硬度高达750.27 HV0.1,远高于Fe-C-N合金层表面硬度,是基体的3~4倍;两种合金层横截面硬度分布曲线都呈梯度分布;Fe-Al-N合金层表面更加均匀、致密,形成了较好的化合物聚集现象,表现出更好的耐磨性。

Fe-Al-N and Fe-C-N alloy layes were prepared on the surface of 45 steel by double-glow plasma aluminizing technology and plasma carbonitriding technology,respectively.The surface microhardness and phase composition of the two alloy layers were analyzed,and the microstructure of the surface,element distribution were observed.The results show that the surface hardness of the Fe-Al-N alloy layer formed on the surface of the 45 steel is as high as 750.27 HV0.1,which is much higher than the surface hardness of the Fe-C-N alloy layer,and it is 3-4 times of that of the matrix.The cross-sectional hardness distribution curves of the two alloy layers are gradient;the surface of the Fe-Al-N alloy layer is more even and dense,and the compound aggregation phenomenon is formed,showing better wear resistance.