大型热轧定宽压力机出钢辊的堆焊复合  

Research on surfacing welding of roll table in heavy hot-rolled slab sizing press

作　　者：钟毅[1] 曾义斌[2] 

机构地区：[1]武汉钢铁(集团)公司研究院,武汉430080 [2]武汉钢铁(集团)公司热轧总厂,武汉430083

出　　处：《塑性工程学报》2013年第1期113-116,共4页Journal of Plasticity Engineering

摘　　要：针对出钢辊长期在温度800℃以上、红热钢坯作用下产生严重的冷热疲劳龟裂和金属间磨损的现象,开发出采用N合金化的堆焊硬面药芯焊丝材料。其显微组织为马氏体+少量铁素体+合金化合物,堆焊层金属具有极高的抗高温软化性能、抗冷热疲劳性能和耐金属磨损性能。制定了合理的堆焊工艺规范,堆焊复合制造的出钢辊使用寿命可长达半年,无热疲劳裂纹的产生,金属间磨损小,满足使用要求。Due to the exit roll with 800 degree and the effect of red-hot billet steel,serious thermal fatigue cracking and wearing of metal can be created.This paper introduced the nitrogen alloying new material of hardfacing flux-cored welding wire.The microstructure of this wire is martensite ＋ a small amount of ferrite ＋alloy compound.The metal of cladding layer has great performance on hi-temperature softening resistance,thermal fatigue resistance and metal wear-resistance.Appropriate surfacing welding process specification has been formulated.The life of exit roll made by hardfacing manufacture technology extended to half of year without thermal figure cracking,and the wearing of metal was reduced.In short,the requirements were satisfied.

关 键 词：堆焊复合制造 出钢辊 N合金化 硬面药芯焊丝 

分 类 号：TG422.3[金属学及工艺—焊接]