淬火工艺对渗碳18Cr2Ni4WA钢采煤机行走轮冲击性能的影响  

Effect of quenching process on impact property of carburized 18Cr2Ni4WA steel shearer walking wheel

作　　者：何潇 许鸿翔 师陆冰 赵少甫 戎泽玉 关鹤 陈治 He Xiao;Xu Hongxiang;Shi Lubing;Zhao Shaofu;Rong Zeyu;Guan He;Chen Zhi(China Academy of Machinery Zhengzhou Research Institute of Mechanical Engineering Co.,Ltd.,Zhengzhou Henan 450001,China;Zhengzhou Research Institute of Mechanical Engineering Co.,Ltd.,Zhengzhou Henan 450001,China)

机构地区：[1]中国机械总院集团郑州机械研究所有限公司,河南郑州450001 [2]郑机所(郑州)传动科技有限公司,河南郑州450001

出　　处：《金属热处理》2025年第3期69-73,共5页Heat Treatment of Metals

基　　金：国家重点研发计划(2023YFB3408004)。

摘　　要：研究了淬火工艺对18Cr2Ni4WA钢渗碳淬火采煤机行走轮冲击性能的影响,通过对18Cr2Ni4WA钢采煤机行走轮进行渗碳热处理后,再分别进行780、800、830℃油淬,最后经-60℃冷处理2 h后继续180℃回火15 h完成全部热处理工艺,热处理后对试样进行力学性能和显微组织检测。结果表明:降低淬火温度,行走轮心部硬度明显降低,心部冲击性能大幅提升。采用亚温淬火工艺,淬火温度为780℃时,使采煤机行走轮满足表面硬度要求的同时提高心部冲击性能,显微组织由板条马氏体+铁素体+贝氏体及残留奥氏体组成,心部冲击性能大幅提升,冲击吸收能量达到108 J,实现渗碳淬火行走轮心部冲击性能的提升。The effect of quenching process on impact property of the carburized 18Cr2Ni4WA steel shearer walking wheels was investigated.After carburizing heat treatment,the 18Cr2Ni4WA steel shearer walking wheels were oil-quenched at 780,800 and 830℃,respectively,and finally cryogenic treated at-60℃for 2 h,then tempered at 180℃for 15 h.After the heat treatment,the mechanical properties and microstructure of the specimens were tested.The results show that the hardness of the core of the walking wheel is significantly reduced,while the impact property of the core is greatly improved when the quenching temperature is reduced.By adopting intercritical quenching process,when the quenching temperature is 780℃,the shearer walking wheel can meet the surface hardness requirements and improve the impact property of the core,and the microstructure is composed of lath martensite,bainite,ferrite and retained austenite,and the impact property of the core is greatly improved with impact absorbed energy of 108 J,achieving the improvement of the core of the impact property of the carburized and quenched walking wheel.

关 键 词：18CR2NI4WA钢 行走轮 渗碳 亚温淬火 冲击性能 

分 类 号：TG156.31[金属学及工艺—热处理]