摘要
采用CO2气体保护实心焊丝堆焊与喷射送粉的方法在Q235钢表面制备了具有一定耐磨性且无缺陷的韧化Fe-B-C-Ti堆焊涂层,通过金相组织观察,XRD, SEM,硬度测试和磨损试验研究了Ti含量对高碳高硼铁基合金堆焊层的组织及耐磨性的影响。结果表明:Ti元素可抑制过共晶高碳高硼堆焊合金组织中Fe2B相的形态,能细化初生硼化物和共晶硼化物晶粒,使组织分布均匀,提高堆焊层的韧性。堆焊层以Fe2B初生相和Fe2B+(α-Fe)共晶组织为主,同时含有少量的Fe3(B,C),此组织硬度在HRC63以上,有利于提高堆焊层耐磨性。随着Ti含量的增加,析出相尺寸减小、数量增多、且分布均匀,添加Ti元素可有效提高堆焊层的综合性能。
The CO2 gas shielded solid core wire and jet to send powder method was used to produce the abrasion resistance and certain tough Fe-B-C-Ti welding coatings on Q235 steel surface without defects.The effect of Ti content on microstructure and wear-resisting performance of high carbon high boron iron-based alloy welding coating was investigated by OM,XRD,SEM and hardness test and wear test.The results showed that Ti could inhibit the Fe2 B phase in the microstructure of eutectic high-carbon high-boron surfacing alloys and refine the grain of primary borides and eutectic borides,which make the microstructure evenly distributed,and improve the toughness of the surfacing layer.The microstructure was mainly composed of Fe2 B+α-Fe eutectic structure,and also contained a small amount of Fe3(B,C).The hardness of the welding coating was above HRC63,which was conducive to improving the wear resistance.With the increase of Ti content,the size,quantity and distribution of precipitated phase decreased,and the addition of Ti element could effectively improve the comprehensive performance of the surfacing layer.
作者
云璐
郝新
YUN Lu;HAO Xin(Department of Metallurgy and Material Engineering,Inner Mongolia Technical College of Mechanics and Electrics,Hohhot 010070,Inner Mongolia Autonomous Region,China;School of Material Science and Engineering,Corrosion Research Center,Inner Mongolia University of Technology,Hohhot 010050,Inner Mongolia Autonomous Region,China)
出处
《焊接技术》
2020年第4期5-8,I0007,共5页
Welding Technology
关键词
TI含量
高硼铁基合金
堆焊层
耐磨性
Ti content
high boron-iron based alloy
surfacing layer
wear resistance
