摘要
齿轮在渗碳淬火回火后发现沿齿轮圆周方向5个齿面出现较大裂纹。本文从化学成分、硬度、显微组织、非金属夹杂、微观形貌及裂纹断口形貌等多方面对开裂的齿轮进行全面分析。结果表明,齿轮的材质、硬度、显微组织、有效硬化层深度均符合技术要求,分析中发现原材料中局部存在大量的硫化物夹杂(Mn,Fe)S,在锻造过程中造成开裂。以后需加强原材料的检验力度,避免出现不必要的损失。
Crack cause of a failed gear tooth surface was investigated through test or analysis of the crack morphology,chemical composition,hardness,microstructure and non-metallic inclusions. The results show that the chemical composition,hardness,microstructure and effective case depth meet the requirements,the existence of a lot of non-metallic inclusions（ Mn,Fe） S is the main reason to cause the gear crack in the forging process. It is necessary to carefully control the quality of the raw material in order to minimize the losses.
出处
《金属热处理》
CAS
CSCD
北大核心
2017年第7期180-184,共5页
Heat Treatment of Metals
