Q235钢板表面耐磨堆焊层的组织与性能研究  

Microstructure and Properties of Wear Resistant Surfacing Layer on Q235 Steel Plate

作　　者：董盛荣 DONG Shengrong(Hunan Provincial College of Industrial Technician, Yueyang 414000, China)

机构地区：[1]湖南省工业技师学院,湖南岳阳414000

出　　处：《材料开发与应用》2018年第5期54-59,共6页Development and Application of Materials

摘　　要：研究了药芯焊丝中CaB_6的添加量对Q235钢板堆焊层组织、物相、硬度和耐磨性能的影响。结果表明,堆焊修复层主要由奥氏体、马氏体、共晶碳硼化物和一次碳硼化物组成,随着CaB_6添加量的增加,基体中块状的白色碳硼化物数量逐渐增多; 6. 0%CaB_6添加量的堆焊修复层主要由Cr-Fe、(Cr,Fe)_7(C,B)_3、(Cr,Fe)_3(C,B)、奥氏体和马氏体组成,堆焊层熔合区宽度约为18μm,界面结合良好;随着CaB_6添加量的增加,堆焊修复层的平均硬度呈现逐渐增加的趋势,而相对耐磨性呈现先增强而后降低的趋势且在CaB_6添加量为3. 0%时取得最大值。The effects of CaB6 content in flux cored wire on microstructure,phase,hardness and wear resistance of surfacing metal on Q235 steel plate were studied. The results show that the surfacing layer is mainly composed of austenite,martensite,eutectic carbon boride and carbon boride,and with the increase of CaB6 content,the number of white carbon boride blocks in the matrix gradually increases; that the surfacing layer with 6. 0% CaB6 is mainly composed of Cr-Fe,（ Cr,Fe）7（ C,B）3,（ Cr,Fe）3（ C,B）,austenite and martensite,and the width of the fusion zone is about 18 μm with a strong interface; that with the increase of CaB6 content,the average hardness of surfacing layer shows a gradually increasing trend,while the relative wear resistance increases first and then decreases,and it reaches the maximum when the amount of CaB6 is 3. 0%.

关 键 词：Q235钢板 堆焊层 CaB6 组织 耐磨性能 

分 类 号：TG445[金属学及工艺—焊接]