论文部分内容阅读
采用等离子堆焊工艺,在普碳钢表面分别熔覆Cu-Fe合金层和含有4%Mo的Cu-Fe-Mo合金层,并对两种合金熔覆层进行显微组织和耐磨性能分析对比。结果表明,未加入Mo元素的Cu-Fe合金熔覆层中,由液相分离得到的富Fe相分布集中,并在重力的作用下富集于近表面区域;富Fe相组织较为粗大,具有亚共晶结晶特征。而加入Mo元素的Cu-Fe-Mo合金熔覆层,Mo元素主要溶于富Fe相中,富Fe相的相对集中现象得到改善,组织明显细化,并且分布均匀,具有伪共晶结晶特征。
The plasma surfacing process was used to weld Cu-Fe alloy layer and Cu-Fe-Mo alloy layer containing 4% Mo on the surface of plain carbon steel respectively. The microstructure and wear resistance of the two alloy coatings were analyzed Compared. The results show that in the Cu-Fe alloy without Mo addition, the Fe-rich phase separated by liquid phase is concentrated and enriched in the near-surface region under the action of gravity. The Fe-rich phase is coarse and has a Hypoeutectic crystallization characteristics. The addition of Mo element to the Cu-Fe-Mo alloy cladding layer, the Mo element is mainly dissolved in the Fe-rich phase, the relative concentration of Fe-rich phase is improved, the organization was significantly refined, and evenly distributed, with pseudo-eutectic crystallization .