摘要
酒钢选烧厂MQY3660球磨机在运行过程中,传动齿轮轴出现齿根开裂和断轴现象。对1#齿轮轴进行试验分析,包括宏观断口分析、化学成分分析、锻造等级检验、硬度检验以及金相显微组织分析,综合分析齿轮轴断裂主要原因是制造过程热处理工艺不当,出现大量带状铁素体,硬度值偏差较大等缺陷。
In the MQY3660 ball mill operation of JISCO beneficiation and sintering plant, the driving gear shaft appears the root cracking and shaft broken. The experimental analysis was carried out on the 1# gear shaft, including macroscopic fracture analysis, chemical composition analysis, forging grade test, hardness test and metallographic microstructure analysis. Compre- hensive analysis results show that the main reason is improper heat treatment in the manufactur- ing process, and the generation of a large number of sheet ferrite, the larger hardness deviation and other defects.
关键词
球磨机
传动齿轮轴
硬度检验
热处理工艺
金相显微组织分析
ball mill
driving gear
hardness test
heat treatment process
metallographicmicrostrueture analysis
