摘要
在Fe-Cr-C药芯焊丝中添加适量的铌铁粉,采用自动焊设备制备出含有适量硬质相NbC的堆焊层,分析了硬质相NbC对Fe-Cr-C堆焊层组织和性能的影响。研究表明,在Fe-Cr-C堆焊层中的M7C3尺寸略大,生成了硬质相NbC的堆焊层的初生碳化物尺寸均匀,分布更加弥散,含NbC的堆焊层硬度达到61.4HRC,与Fe-Cr-C堆焊层的52.8HRC相比提高了约16.29%,相对耐磨性提高43%。MC型硬质相NbC的显微硬度达到2 237HV。NbC断面呈不规则的多边形,呈团簇状聚集在一起,分布不均匀。
Hardfacing layer including NbC particles was produced by using automatic welding machine with Fe-Cr-C flux cored wire containing Nb-Fe powder. The effect of NbC on the microstructure and property of Fe-Cr-C hardfacing layer was studied. The results show that the size of M7 C2 in Fe-Cr-C hardfacing layer is bigger and the distribution and size of Fe-Cr-Nb-C hardfacing layer are more uniform. The hardness of Fe-Cr-Nb-C hardfacing layer is 61.4 HRC, while that of Fe-Cr-C hardfacing layer is 52. 8HRC. The former is higher than the tatter by about 16.29%. Meanwhile the relative wear resistance of the former is higher than that of the latter by 43%. The hardness of hard phase NbC is 2 237HV. The shape of section of NbC is an irregular polygon and its distribution is cluster and not uniform.
出处
《钢铁研究学报》
CAS
CSCD
北大核心
2015年第12期75-78,共4页
Journal of Iron and Steel Research
关键词
耐磨合金
NBC
耐磨性
hardfaeing alloy
NbC
abrasive wear resistance
