Y₂O₃对半钢轧辊激光熔覆层的影响  

Influence of Y2O3 on the Laser Cladding Layer for Semi-Steel Rolls

作　　者：刘厚权 

机构地区：[1]首钢贵阳特殊钢有限责任公司,贵阳

出　　处：《材料科学》2014年第6期239-245,共7页Material Sciences

摘　　要：在半钢轧辊表面激光熔覆的合金粉末中添加1.0 wt%含量的稀土氧化物Y2O3,产生了显著的固熔强化和弥散强化作用,熔覆组织高度细化,产生显著的晶粒细化和强韧性作用,且碳化物的弥散和均匀分布可以有效地阻止晶粒长大,避免热影响区片状马氏体的急剧增加,从而有效的防止裂纹的产生。可以在很大程度上提高半钢轧辊的耐磨性、硬度、抗冷热疲劳强度等各项性能,取得了良好的使用效果。When adding 1.0 wt% rare earth oxide Y2O3 to laser cladding alloy powder on the surface of semi- steel rolls, it made a significant effect on solid fusion strengthening and dispersion strengthening, the microstructure of cladding layer was highly refined, and had a significant role in grain refine-ment and toughness. In addition, the dispersion of carbide and its uniform distribution could pre-vent grain growth effectively, avoided the dramatical increasing of lamellar martensite in the heat affected zone, thus prevented the generation of cracks effectively. It largely improved the semi- steel rolls wear resistance, hardness, resistance to cold and hot fatigue strength, so it obtained good using effect.

关 键 词：Y₂O₃ 轧辊 激光熔覆 硬度 耐磨性 

分 类 号：TG17[金属学及工艺—金属表面处理]