18CrNiMo7-6钢重载内齿轮渗碳淬火工艺  

Carburizing and quenching process of 18CrNiMo7-6 steel heavy-duty internal gear

作　　者：刘进德 米佩 马春亮 Liu Jinde;Mi Pei;Ma Chunliang(Ningxia Tiandi Benniu Industrial Group Co.,Ltd.,Shizuishan Ningxia 753001,China)

机构地区：[1]宁夏天地奔牛实业集团有限公司,宁夏石嘴山753001

出　　处：《金属热处理》2022年第11期134-137,共4页Heat Treatment of Metals

基　　金：宁夏回族自治区重点研发计划(2022BDE92023)。

摘　　要：某减速器重载内齿轮要求进行渗碳淬火处理,因内齿轮结构属于大型薄壁零件,采用常规渗碳淬火方法进行处理后齿部畸变较大,磨齿后公法线尺寸不满足技术要求,造成工件报废。通过渗碳前增加去应力退火工序、增加渗碳时预热工艺、降低渗碳温度及降低冷却强度等方式,解决了重载内齿轮渗碳后齿部畸变超差问题,为薄壁重载内齿轮渗碳淬火提供了质量保证。The heavy-duty internal gear of a reducer required carburizing and quenching treatment.Because the internal gear structure was a large thin-wall part,the tooth distortion after conventional carburizing treatment was large,and the common normal size after gear grinding could not meet the technical requirements,resulting in scrapping of the workpiece.By adding stress-relief annealing process before carburizing,increasing preheating process during carburizing,reducing both the carburizing temperature and the cooling intensity,the problem of tooth distortion deviation after carburizing of heavy-duty internal gear is solved,providing a quality guarantee for carburizing and quenching of the thin-wall and heavy-duty internal gear.

关 键 词：18CrNiMo7-6钢 内齿轮 渗碳 淬火 畸变 

分 类 号：TG157[金属学及工艺—热处理]