槽钢轧辊孔槽表面激光熔凝强化处理工艺研究  

Study on Laser Remelted-Strengthening Process on the Aperture Surface of Grooved Roll

作　　者：吴国胜[1] 王玉涛[1] 付志云 唐望生 

机构地区：[1]武汉钢铁(集团)公司研究院,湖北武汉430080 [2]武钢股份制造部,湖北武汉430083 [3]武钢股份条材总厂,湖北武汉430083

出　　处：《应用激光》2011年第1期57-61,共5页Applied Laser

摘　　要：利用5 kW横流CO_2激光器开展槽钢轧辊孔槽表面激光熔凝强化处理工艺研究,结果表明经过激光熔凝处理,大型槽钢轧辊孔槽表层材料变得强韧化了,从硬度较低、耐磨性较差的珠光体+共晶碳化物+极少量莱氏体+球状石墨组织,转变为硬度较高、耐磨性较好的马氏体+下贝氏体+残余奥氏体+球状石墨组织,而且表层奥氏体晶粒度由粗大转变为细小,激光处理完全改变了大型槽钢轧辊原来的组织状态和性能,获得了预期的效果;上机使用后,轧辊使用寿命提高50%以上,同时提高了槽钢产品的产量和质量。Laser remelted-strengthening process on the aperture surface of grooved roll was performed with a 5 kW continuous wave CO2 laser. The results showed that after the laser remelted-strengthening, the aperture surface layer material microstructure of large-scale grooved roll from a low hardness and bad wear resistant pearlite ＋ eutectic carbide ＋ extremely few ledeburite ＋ spheroid graphite, changed to a high hardness and good wear resistant martensite ＋ lower bainite ＋ residual austenite ＋ spheroid graphite; Moreover the surface layer austenite crystal grain size by transform from thick to tiny. So the laser processing obtained anticipated effect. The roll service life enhances above 50% by putting them into use, simultaneously raised the channel steel product output and the quality.

关 键 词：槽钢轧辊 CO2激光器 熔凝强化 金相组织 使用寿命 

分 类 号：TG156.99[金属学及工艺—热处理]