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 :首钢贵阳特殊钢有限责任公司,贵阳;

关键词: Y2O3轧辊激光熔覆硬度耐磨性Y2O3 Rolls Laser Cladding Hardness Wear Resistance

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。

Abstract: 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.

文章引用: 刘厚权 (2014) Y2O3对半钢轧辊激光熔覆层的影响。 材料科学, 4, 239-245. doi: 10.12677/MS.2014.46034

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