退火温度对旋压激光熔覆涂层性能及残余应力的影响  

Effects of Annealing Temperature on Properties and Residual Stress of Spinning Laser Cladding Layer

作　　者：李启航 张健 李艳玲 白峭峰[1] 赵春江[1] 刘映良 LI Qihang;ZHANG Jian;LI Yanling;BAI Qiaofeng;ZHAO Chunjiang;LIU Yingliang(School of Mechanical Engineering,Taiyuan University of Science and Technology,Taiyuan 030024,China;Shuozhou Jinhua Industry Co.,Ltd.,Shuozhou 036000,China)

机构地区：[1]太原科技大学机械工程学院,山西太原030024 [2]朔州金华实业有限公司,山西朔州036000

出　　处：《热加工工艺》2024年第2期47-50,56,共5页Hot Working Technology

基　　金：山西省重点研发计划项目(201903D121051)。

摘　　要：采用激光熔覆技术在27SiMn钢上制备铁基合金熔覆层,并采用强力旋压技术对其进行加工,通过剧烈的塑性变形来改善熔覆层的表面性能。而通过强力旋压工艺制备的熔覆层筒型件通常需要进行热处理以消除较大的残余应力,同时也会对熔覆层的耐磨性产生影响。在350、450、550℃退火2 h后,对其残余应力、显微硬度、耐磨性进行测定。结果表明,热处理后,熔覆层中残余应力明显降低,在试验参数范围内熔覆层表层硬度随温度的升高而出现一定的下降。350℃去应力退火后,其耐磨性能最佳;450℃去应力退火后次之,均优于未热处理熔覆层耐磨性;550℃的耐磨性出现一定的降低。Fe-based alloy cladding layer was prepared on 27SiMn steel by laser cladding technology,and processed by power spinning technology to improve the surface properties of the cladding layer through severe plastic deformation.The cladding cylindrical parts prepared by strong spinning process usually need heat treatment to eliminate large residual stress,which can affect the wear resistance of the cladding layer.After annealing at 350℃,450℃and 550℃for 2 h,the residual stress,microhardness and wear resistance were measured.The results show that the residual stress in the cladding layer decreases obviously after heat treatment,but at the same time,the surface hardness of the cladding layer decreases with the increase in temperature.After 350℃stress relief annealing,the wear resistance reaches the best,followed by 450℃stress relief annealing,which is better than that of the non heat treated cladding layer,and the wear resistance at 550℃decreases to a certain extent.

关 键 词：强力旋压 激光熔覆 热处理 显微硬度 摩擦磨损 

分 类 号：TG156.2[金属学及工艺—热处理] TG174.4[金属学及工艺—金属学]