摘要
采用CO2激光器在液压支架立柱母材27SiMn表面制备了JG-2、JG-3铁基合金熔覆层,分别对其微观组织、成分分布、显微硬度、耐磨性、耐蚀性等进行测定与分析。结果表明:JG-2、JG-3熔覆层无裂纹,与基体呈冶金结合,组织均匀,为较发达的细密枝晶组织;JG-2熔覆层的主要组成相为α-(Fe,Ni)固溶体、Fe4Ni3等,JG-3熔覆层的主要组成相为α-Fe、Fe-Cr、FeCr0.29Ni0.16C0.06等;JG-3熔覆层的平均硬度为609HV10,JG-2熔覆层的平均硬度为542HV10;JG-3熔覆层的磨损失重约为JG-2熔覆层的1/2、立柱母材27SiMn的1/4;极化曲线及参数显示,JG-2熔覆层的耐腐蚀性能更好。
Cladding layers of JG-2 and JG-3 were prepared on hydraulic support column base steel （27SiMn） sur- face by using a CO2 laser. The microstructure, phase, mierohardness, wear characteristics and corrosion per- formance of the layers were all investigated and studied. The results show that the crack-free layers have strong metallurgic bond with the substrates, and the microstructures with well-developed dendrite are uni- form. The main phases of JG-2 layer are composed of a-（Fe, Ni）, Fe4 Nia, while the main phases of JG-3 lay- er are mainly composed of a-Fe, Fe-Cr and FeCr0.29 Ni0.16 C0.06. The average hardness of JG-3 layer is 609.50 HVI0, and that of JG-2 layer is 542.5 HV10. The wear weight loss of JG-3 layer is the smallest, about 1/2 times JG-2 layer and a quarter 27SiMn. According to polarization curves and parameters, the corrosion resist： ance of JG-2 cladding layer is better.
出处
《中国表面工程》
EI
CAS
CSCD
北大核心
2013年第6期42-47,共6页
China Surface Engineering
关键词
液压支架立柱
激光熔覆
铁基合金
hydraulic support columm laser cladding
Fe-based alloys
