冷轧工作辊堆焊修复气保护药芯焊丝的研制  

Development of gas-shielded flux-cored wire for hardfacing of cold working-roll

作　　者：许立宝 张健 李仕臣 黄锐 姜雪 Xu Libao;Zhang Jian;Li Shichen;Huang Rui;Jiang Xue(Tianjin Golden Bridge Welding Materials Group Co.,Ltd.,Tianjin 300300,China;Tianjin Key Laboratory of Enterprise of Upmarket Equipment Manufacturing and Welding Material and Technology,Tianjin 300300,China)

机构地区：[1]天津市金桥焊材集团股份有限公司,天津300300 [2]天津市高端装备制造焊接材料及技术企业重点试验室,天津300300

出　　处：《焊接》2020年第9期52-56,60,64,共7页Welding & Joining

摘　　要：针对用于堆焊修复冷轧工作辊的气保护药芯焊丝进行了研究。试验结果表明,该试验焊丝熔敷金属的C含量为0.69%时,堆焊层硬度达到最高;熔敷金属中Cr,Mo,W,V四种元素的总量在6%~10%且(Cr+V)/(Mo+W)=1~1.4时,堆焊层抗摩擦磨损性能较优;焊丝(RE+Ti)的添加量在2%时,冶金变质作用最强,晶粒细化效果明显,韧性较优。研制的焊丝堆焊工艺性能优良,经580℃回火时,析出强化作用与基体的弱化达到平衡,堆敷金属硬度达到最高,满足冷轧辊现场修复工况和使用要求。The gas-shielded flux-cored wire for hardfacing of cold working-roll was studied.The experimental results showed that the hardness of the hardfacing layer was the highest when the C content of the deposited metal was 0.69%.The total amount of Cr,Mo,W and V in the deposited metal was 6%~10% and(Cr+V)/(Mo+W)=1~1.4,friction and wear-resistance of the hardfacing layer was better.When the addition of(RE+Ti)was 2%,metallurgical metamorphism was the best,the grain size was greatly reduced,and toughness was better.The developed wire had excellent welding technology.After 580℃ heat treatment,it were balanced between precipitation strengthening and matrix softening,and the hardness of the hardfacing metal reached the maximum,which satisfied the site repairing and operation requirement of cold-roll.

关 键 词：冷轧工作辊 堆焊药芯焊丝 硬度和韧性 晶粒细化 回火 

分 类 号：TG422.3[金属学及工艺—焊接]