45号钢垫圈断裂的原因分析和改进措施

针对45号钢垫圈在装配后发生断裂的情况,对45号钢垫圈进行断口形貌分析、力学性能分析、化学成分分析和金相组织分析。宏观形貌显示内孔存在加工台阶和明显刀痕,能谱测试发现断裂起始处存在锌元素,金相组织分析确认内孔加工面存在微裂纹。结合加工工艺分析,确认45号钢垫圈的断裂原因,并提出改进措施。

Cause Analysis and Corrective Measures of Fracture in 45 gauge Steel Washer

Aiming at the fracture of 45 gauge steel washer after assembly,the fracture morphology analysis,mechanical property analysis,chemical composition analysis and metallurgical structure analysis of the 45 gauge steel washer were carried out.The macroscopic morphology showed that there were machining steps and obvious knife marks in the inner bore.The energy spectrum test found that zinc was present at the section start of the fracture,and the metallurgical structure analysis confirmed that there were microcracks in the machined surface of the inner bore.Combined with the analysis of the processing technology,the cause of the fracture of the 45 gauge steel washer was confirmed,and corrective measures were proposed.