B_4C含量对原位反应型合金粉末氩弧熔覆层耐磨性的影响

Effect of B_4C content on wear resistance of argon arc clad layer with in situ reactive alloy powder

采用还原铁粉、碳化硼粉末、硼砂在基体金属材料Q235钢板上进行氩弧熔覆,并研究了6%、8%、10%、12%(质量分数)四种不同碳化硼含量对熔覆层组织和耐磨性的影响。结果表明,当碳化硼含量达到12%时熔覆层有新形成的Fe2B,随碳化硼含量的增加熔覆层硬度、抗磨粒磨损性能、抗黏着磨损性能、抗冲蚀磨损性能逐渐提高,当碳化硼含量达到12%时,硬度是基体的3.2倍,相对耐磨粒磨损、黏着磨损、冲蚀磨损性能都大幅度提高,分别是基体的5.4、3.7、4.3倍。

Argon arc cladding test was carried out on Q 235 steel with reduced iron powder , boron carbide powder and borax .Effects of boron carbide content (6%, 8%, 10%and 12%, mass fraction) on microstructure and wear resistance of the clad layers were investigated .The results show that when the boron carbide content is 12%, there is new phase Fe 2 B existing in the clad layer .With the increase of boron carbide content , the hardness , abrasive wear , adhesive wear and erosion wear resistance of the clad layer are gradually improved , when the boron carbide content reaches 12%, the hardness is 3.2 times of the matrix, and the relative abrasive wear , adhesive wear and erosion wear resistances are 5.4, 3.7 and 4.3 times of the matrix, respectively.