表面处理工艺对42CrMo钢刀毂的影响研究  

Researched on the influence of surface treatment process on 42CrMo steel blade hub

作　　者：游菲 姜影 王玉才 沈子达 黄俏梅 YOU Fei;JIANG Ying;WANG Yucai;SHEN Zida;HUANG Qiaomei(Zhuzhou CRRC Timly Forge Co.,Ltd.,Zhuzhou,412001,Hunan,China)

机构地区：[1]株洲中车天力锻业有限公司,湖南株洲412001

出　　处：《金属加工（热加工）》2024年第12期84-87,91,共5页MW Metal Forming

摘　　要：刀毂重复使用需保证其装配尺寸在有效范围,因此研究不同表面处理工艺对尺寸变化的影响具有现实意义。对比研究了激光淬火、中频感应淬火、整体渗氮3种表面处理工艺对42CrMo钢成品盾构环形刀毂尺寸的影响。结果表明:成品环形刀毂(每组20件)经激光淬火后外径尺寸变化为-0.012~-0.008mm,内径尺寸变化为-0.013~-0.007mm;中频感应淬火后外径尺寸变化量为-0.180~0.130mm,内径尺寸变化为-0.120~0.120mm;整体渗氮后外径尺寸变化为-0.015~0.015mm,内径尺寸变化在-0.020~0.005mm;淬硬层深度分别为0.6mm、3.5mm、0.3mm。综合对比试验结果,激光淬火工艺对尺寸变化的影响最小,淬硬层深度适中,是最优的工艺方案。It is necessary to ensure that its assembly dimensions are within the effective range after repairing the wear of the finished annular cutter hub.Therefore,researching the impact of different repair processes on dimensional changes has practical significance.This paper compares and studies the effects of three surface treatment processes,namely laser quenching,intermediate frequency quenching,and overall nitriding,on the size of the 42CrMo finished shield tunneling ring cutter hub.The results showed that the outer diameter size of the finished annular cutter hub(20 pieces/group)changed by-0.012~-0.008mm and the inner diameter size changed by-0.013~-0.007mm after laser quenching;The change in outer diameter size after intermediate frequency quenching is-0.180~0.130mm,and the change in inner diameter size is-0.120~0.120 mm;The change in outer diameter size after overall nitriding is-0.015~0.015mm,and the change in inner diameter size is-0.020~0.005mm;The depth of the hardened layer is 0.6mm,3.5mm,and 0.3mm,respectively.Based on the comprehensive comparative test results,the laser quenching process is optimal process solution has the smallest range of dimensional changes and a moderate depth of the hardened layer.

关 键 词：42CRMO钢 激光淬火 中频感应淬火 整体渗氮 

分 类 号：TG156[金属学及工艺—热处理] TG142.1[金属学及工艺—金属学]