光纤激光熔凝工艺对45钢表面组织与性能的影响  

Effects of Fiber Laser Quenching Processing on Microstructure and Property of 45 Steel Surface

作　　者：何力佳[1] 赵晓杰[1] 王函[1] 

机构地区：[1]辽宁工业大学材料科学与工程学院,辽宁锦州121001

出　　处：《铸造》2015年第6期552-554,共3页Foundry

基　　金：辽宁省自然科学基金(2013020086);2013中央支持地方高校发展专项资金(汽车零部件先进制造技术协同创新团队项目)

摘　　要：利用IPG-3000W光纤连续激光器在耐火砖芯模(45钢)表面进行熔凝强化处理。利用金相显微镜、显微硬度计等分析手段研究光纤激光熔凝处理对45钢微观组织、显微硬度的影响。结果表明:经光纤激光熔凝后45钢表面的晶粒得到了明显细化,随着激光功率的增加,熔凝层深度明显增加;随着激光扫描速度的增加,晶粒细化越显著。表面熔凝后的组织受相变强化和细晶强化的双重作用,使其力学性能显著提高,显微硬度相对于基体明显增加。The fiber laser melting treatment was employed on 45 steel surface with IPG-3000 fiber laser. The effects of laser melting treatment on the variation of microstructure and properties of the 45 steel were studied. The results show that the grains of 45 steel were refined after laser melting. With the increase of laser scanning speed the grains are refined increasingly. The microhardness of samples was increased due to the quicker solidification speed with the higher laser power and quicker laser scanning speed. The mechnical property of structure was increased on the basis of phase transformation strength and grain refine, the hardness value of the melted zone was much higher than the parent material.

关 键 词：光纤激光 显微硬度 微观组织 

分 类 号：TG142.1[一般工业技术—材料科学与工程] TG665[金属学及工艺—金属材料]