高强度风电螺栓用42CrMoA钢阶梯轴裂纹缺陷分析  

Analysis of crack defects in 42CrMoA steel stepped shaft for high strength wind power bolts

作　　者：崔政 王瑞 毛威昂 Cui Zheng;Wang Rui;Mao Weiang(Jianlong Beiman Special Steel Co.,Ltd.,Qiqihar 016000,China)

机构地区：[1]建龙北满特殊钢有限责任公司,黑龙江齐齐哈尔016000

出　　处：《金属制品》2024年第3期45-47,共3页Metal Products

摘　　要：42CrMoA钢阶梯轴调质开裂。对带有裂纹的阶梯轴试样进行分析。结果表明裂纹附近无夹杂物,组织无氧化脱碳。分析认为试样裂纹在调质处理过程产生。通过对化学成分优化,降低Si、Mo合金质量分数,添加更多的Mn、Cr合金,同时将w(C)从0.406%提高到0.425%,保证42CrMoA钢淬透性,化学成分优化后,在相同加工工艺情况下,阶梯轴没有再出现调质开裂。42CrMoA steel stepped shaft quenching and tempering cracked.Cracked stepped shaft specimens were analyzed.Results showed that there were no inclusions near crack and no oxidative decarburization of structure.According to analysis,specimens crack is generated in quenching and tempering treatment process.Through chemical composition optimization,mass fraction of Si and Mo alloys is reduced,more Mn and Cr alloys are added,and w(C)is increased from 0.406%to 0.425%to ensure 42CrMoA steel hardenability.After chemical composition was optimized,there was no quenching and tempering cracking of stepped shaft under same processing technology.

关 键 词：42CrMoA 风电螺栓 调质 金相组织 淬透性 化学成分 

分 类 号：TG111.91[金属学及工艺—物理冶金]