Cr元素对Fe-B堆焊合金的金相组织与性能的影响  

Effect of Cr Element on Metallographic Microstructure and Properties of Fe-B Surfacing Alloy

作　　者：韦茹涵 韩明臻 井瑞 刘奇聪 WEI Ru-han;HAN Ming-zhen;JING Rui;LIU Qi-cong(School of Materials Science and Engineering,Jiamusi University,Jiamusi 154007,China;School of Materials Science,Shandong University,Jinan 250012,China)

机构地区：[1]佳木斯大学材料科学与工程学院,黑龙江佳木斯154007 [2]山东大学材料学院,山东济南250012

出　　处：《材料保护》2023年第5期89-96,共8页Materials Protection

基　　金：佳木斯大学校级大学生创新创业训练计划项目(2021xj13)资助。

摘　　要：为了提高Fe-B堆焊合金的耐磨性,利用等离子堆焊技术在Q235钢材料表面熔覆不同铬含量的Fe-B-Cr堆焊合金层,通过金相分析、扫描电镜分析、X射线衍射分析,研究Cr元素含量对Fe-B-Cr堆焊合金的组织、硬度和耐磨性的影响。结果表明:随着Cr含量的添加,Cr固溶于Fe和Fe_(2)B中,堆焊合金由(Fe,Cr)和(Fe,Cr)2B组成,Cr含量的增加未使Fe-B堆焊合金中生成新相,合金组织由Fe_(2)B和Fe+Fe_(2)B的共晶组织构成。Cr元素的添加显著提高了Fe-B堆焊合金的硬度和耐磨性。Cr-2的硬度较Cr-0显著升高。随着Cr含量的不断增加,堆焊合金的硬度值呈上升趋势,Cr-10堆焊层表面硬度高达67 HRC。Cr-10堆焊层的磨损量降到最低,为0.0275 g,其相对耐磨性较Cr-0提高了375%。In order to improve the wear resistance of Fe-B surfacing alloy,plasma surfacing technology was used to clad Fe-B-Cr surfacing alloy layers with different chromium contents on the surface of Q235 steel material.The effect of Cr element content on the microstructure,hardness,and wear resistance of Fe-B-Cr surfacing alloy was studied by using metallographic analysis,scanning electron microscopy analysis,and X-ray diffraction analysis.Results showed that with the increase of Cr content,Cr was solidly soluble in Fe and Fe_(2)B,and the surfacing alloy was composed of(Fe,Cr)and(Fe,Cr)2 B.The increase of Cr content did not cause the formation of new phases in Fe-B surfacing alloy,and the alloy structure was composed of eutectic structures of Fe_(2)B and Fe+Fe_(2)B.Meanwhile,the addition of Cr element significantly improved the hardness and wear resistance of Fe-B surfacing alloy.The hardness of Cr-2 was considerably higher than that of Cr-0.With the continuous increase of Cr content,the hardness value of the surfacing alloy showed an upward trend,and the surface hardness of the Cr-10 surfacing layer was as high as 67 HRC.Moreover,the wear of the Cr-10 surfacing layer was minimized to 0.0275 g,and its relative wear resist-ance increased by 375%compared to Cr-0.

关 键 词：等离子堆焊技术 Fe-B-Cr堆焊合金 组织结构 硬度 

分 类 号：TG174[金属学及工艺—金属表面处理]