摘要
基于"光束中空,光内送粉"技术对40CrMo钢(/%:0.40C,1.20Cr,0.25Mo)进行表面激光熔覆铁基合金粉末(/%:0.60C,15.25Cr,1.11Si,1.85Mo)以提高硬度,获得更加理想的耐磨性能。40CrMo钢硬度HV_(0.2)值为250,激光熔覆后表面硬度HV_(0.2)值为500。对基体的进行200℃预热处理有利于获得更加良好的冶金结合,其基体的热影响区和结合区也相对较小。由于较大的温度梯度造成的快速冷却和合金化共同影响的结果,试样结合区硬度高于激光熔覆层其他区域。
Based on ＂inside-laser coaxial powder feeding＂ technology the surface of steel 40CrMo（/%;0.40 C,1.20 Cr,0.25Mo） is laser-clad with iron-base alloy powder（/%：0.60 C,15.25 Cr,1.11 Si,1.85Mo） to increase surface hardness and get idea wear resistance.The hardness HV_（0.2） value of steel 40 CrMo is 250 while the surface hardness HV_（0.2）value by laser cladding is 500.It is available to get better metallurgical binding interface between base metal and coating material by base metal pretreated at 200 ℃,and the heat affected zone of base metal and binding interface zone are relatively smaller.Due to quick cooling and alloying effect by larger temperature gradient,the hardness of sample bending zone is higher than other area of laser cladding.
出处
《特殊钢》
北大核心
2016年第1期22-24,共3页
Special Steel
基金
国家自然科学基金资助(No.51201061)
