B对碳弧焊Fe-Cr-C系耐磨合金的组织和耐磨性影响  

Effect of boron on microstructure and wear resistance of carbon arc hardfacing layer with Fe-Cr-C alloy system

作　　者：杨绍斌[1] 董伟[1] 李婷[1] 王洪才[1] 

机构地区：[1]辽宁工程技术大学材料科学与工程学院,辽宁阜新123000

出　　处：《兵器材料科学与工程》2011年第6期33-35,共3页Ordnance Material Science and Engineering

摘　　要：采用碳弧焊的方法,通过在较高范围内（0.4%-2.5%）调节Fe-Cr-C系耐磨堆焊合金粉块中B的含量,探讨B对组织和耐磨性能的影响。结果表明,添加B使得初生碳化物明显细化,数量明显增多,分布也趋于均匀,细小的共晶碳化物增多,并产生硬质相B4C。实验中4种合金粉块均与基体（Q235）有良好的冶金结合。B的质量分数在0.4%-2.5%范围内随着含量的升高,堆焊层的硬度和耐磨性呈上升趋势。当B的质量分数为2.5%时,其硬度达到64.7HRC,磨损质量损失仅为1.1 mg。Using carbon arc welding method,through adjusting boron content of Fe-Cr-C hardfacing alloy system powder block in the high range（0.4%-2.5%）,the effect of B on microstructure and wear resistance properties was studied.The results show that the addition of boron can refine primary carbide obviously,increase its number,and the distribution of which tends to be uniform.Fine eutectic carbide also increases,and a kind of hard phase B4C is generated.In the Experiment,four kinds of alloy powder blocks and matrix（Q235） exhibit good metallurgical bonding.With the content of B increasing in the range of 0.4%-2.5%,the hardness and wear resistance are increasing.When the content of B is 2.5%,the hardness of hardfacing layer reaches 64.7HRC and the wear weight loss is only 1.1 mg.

关 键 词：Fe-Cr-C系耐磨合金 B元素 碳弧焊 耐磨性 

分 类 号：TG135.6[一般工业技术—材料科学与工程]