偏析组织对内齿圈感应淬火层组织与硬度的影响  

Effect of segregation on surface microstructure and hardness of induction hardened inner gear ring

作　　者：陈永祥 吕和生 杨刚 李勇 王春莉 仲博颖 Chen Yongxiang;LüHesheng;Yang Gang;Li Yong;Wang Chunli;Zhong Boying(Chongqing Gearbox Co.,Ltd.,Chongqing 402260,China)

机构地区：[1]重庆齿轮箱有限责任公司,重庆402260

出　　处：《金属热处理》2025年第2期86-89,共4页Heat Treatment of Metals

基　　金：国家重点研发计划(2023YFB3406303)。

摘　　要：对42CrMoA钢内齿圈偏析组织进行表征,并对内齿圈感应淬火显微组织和淬硬层硬度梯度进行检测分析。结果表明,42CrMo钢内齿圈锻件显微组织不均匀,严重的带状组织和成分偏析导致感应淬火淬硬层组织不均匀,且依然存在带状组织分布。内齿圈锻件的带状组织及成分偏析对感应淬火次表层和过渡区的硬度梯度有着显著影响。该内齿圈感应淬火次表层和过渡区硬度梯度波动较大且存在陡升陡降现象。Segregation phenomenon of 42CrMoA steel inner gear ring was characterized,and the microstructure and hardness gradient of the induction hardened layer of the inner gear ring were analyzed.The results show that the microstructure of the 42CrMo steel inner gear ring forging is uneven,with severe banded structure and compositional segregation,which leads to uneven induction hardened layer structure,and the distribution of banded structure still exists.The banded structure and compositional segregation of inner gear ring forgings have a significant impact on the hardness gradient of the induction hardened subsurface and transition zone.The hardness gradient of the induction hardened subsurface and transition zone of the inner gear ring fluctuates greatly and exhibits a steep rise and fall phenomenon.

关 键 词：偏析组织 42CrMoA钢内齿圈 感应淬火 显微组织 硬度梯度 

分 类 号：TG156.3[金属学及工艺—热处理]