摘要
某矿用减速器太阳轮渗碳淬火后发生齿部裂纹,因裂纹较深造成产品报废,为分析太阳轮失效原因,从原材料、热处理工艺、显微组织、晶粒尺寸以及裂纹宏观、微观形态特征等方面进行了分析探讨。结果表明,太阳轮所用材料化学成分符合18CrNiMo7-6钢标准,其裂纹是典型的沿晶开裂的淬火裂纹,其产生的主要原因与晶粒粗大有关。采用现有热处理工艺参数不会造成晶粒粗大,晶粒粗大与前期锻造加热或锻造过程不当有关。
After carburizing and quenching,tooth cracks occurred in the sun gears of mining reducer,causing the products to be scrapped due to the deep cracks.In order to analyze the failure cause of the sun gear,the raw materials,heat treatment process,microstructure,grain size,and macro and micro morphological characteristics of the cracks were analyzed and discussed.The results show that the chemical composition of the material used for the sun gear conforms to the standard of the 18CrNiMo7-6 steel,and the cracks in the sun gear are typical intergranular quenching ones,the main reason of which is related to the coarse grain size.The coarse grains are not caused by the existing late heat treatment,but are mainly related to the improper heating temperature or forging process in the early process stages.
作者
张磊
米佩
马春亮
孙永鹏
Zhang Lei;Mi Pei;Ma Chunliang;Sun Yongpeng(Ningxia Tiandi Benniu Industrial Group Co.,Ltd.,Shizuishan Ningxia 753001,China)
出处
《金属热处理》
CAS
CSCD
北大核心
2023年第9期293-296,共4页
Heat Treatment of Metals
基金
单机功率3000 kW超重型智能刮板输送机用行星齿轮减速器研制(2022BDE92023)。
