摘要
对30CrMnTi钢接链环在使用过程中的断裂失效问题进行了相关研究。为了查找断裂原因,利用直读光谱仪、光学显微镜、扫描电镜和显微硬度计等对试样的成分、组织和硬度进行了检测分析。结果表明:经热处理后的试样组织为回火屈氏体和铁素体,这可能是由于加热温度低,奥氏体化不完全,导致铁素体组织保留了下来,降低了零件的最大负载能力,部分铁素体组织呈针状分布在晶界处,易产生应力集中造成开裂。
Fracture failure of 30 CrMnTi steel mining chain link in service was investigated.In order to find the cause of the fracture,chemical composition,microstructure and micro-hardness of specimen was analyzed by using direct-reading spectrometer,optical microscope,scanning electron microscope( SEM) and micro-hardness tester.The results show that the microstructure of the specimen after heat treatment is consist of tempered troostite and ferrite.The ferrite which retained from initial microstructure due to lower austenitizing temperature results in the reduction of the maximum load capacity of the part.Furthermore,some needle-like ferrite along the grain boundary is easy to induce stress concentration and become the cracking cause.
作者
王建刚
周啸颖
Wang Jiangang;Zhou Xiaoying(Hebei Key Laboratory of Material Near-Net Forming Technology,College of Materials Science and Engineering,Hebei University of Science and Technology,Shijiazhuang Hebei 050018 ,China;College of Materials Science and Engineering,Hebei University of Science and Technology,Shijiazhuang Hebei 050018 ,China)
出处
《金属热处理》
CAS
CSCD
北大核心
2019年第5期232-236,共5页
Heat Treatment of Metals
基金
河北省高等学校科学技术研究项目(QN2016048)
河北省引进国外智力项目
