Ti和N对Fe基耐磨合金组织和性能的影响

Effects of Ti and N on Microstructure and Performance of Fe-based Abrasion Resistant Alloy

以Fe-Cr-C合金体系为基础,将Ti和N元素分别以钛铁和氮化铁形式与其他合金粉末一起配制成药粉,制作成药芯焊丝,通过堆焊机制备耐磨堆焊层。对堆焊层的微观组织和力学性能进行研究。结果表明：在Fe-Cr-C-Ti-N药芯焊丝中,当高碳铬铁和氮化铁量分别为40%和27%时,钛铁添加量为12%时,堆焊层具有最高的洛氏硬度60.2HRC,具有最小磨损量0.13g;增加药芯焊丝中氮含量使堆焊层中TiN等硬质增强相增多。当堆焊层中氮化铁含量为22.5%,钛铁含量为12%时,该堆焊层具有最高的洛氏硬度,为57.4HRC,磨损量为0.11g。

Taking Fe-Cr-C alloy system as foundation, the powder was confccted by mixing Ti and N dements in the form of Ti-Fc and iron nitrogen with other alloy powdcrs, and then the flux cored wire was prepared. The wear resistant surfacing layers were prepared by surfacing machine. The microstructure and mechanical properties of the surfacing layer were analyzed, The results show that in the Fe-Cr-C-Ti-N flux-cored wire, when the content of high carbon ferroehrome is 40%, the content of iron nitrogen iron is 27%, and the content of nitrogen iron is 12% （the content of Ti is 3.24%）, the surfacing layer has the highest Rockwell hardness of 60.2 HRC, with a minimum abrasion loss of 0.13 g. Changing the content of nitrogen in the flux-cored wire can increase the hardening phase of TiN in the surfacing layer. When the iron nitrogen content in the surfacing layer is 22.5% and Ti-Fe content is 12%, the surfacing layer has the highest Rockwell hardness of 57.4 HRC, and the abrasion loss is 0.11g.