材质为QT400-15球墨铸铁钳座在拉拔力试验时出现裂纹。通过力学性能测定及金相检验,认为钳座在拉拔力试验时出现的裂纹为球化衰退而引起的质量问题。进一步深入分析,得出该质量问题为浇铸时间过长所致,同时铸造厂的质量意识薄弱也是该问题发生的背景原因之一。提出了改进措施并予以实施,从管理入手,完善生产流程控制并加强相关人员培训,取得了良好的效果,杜绝了该类问题的重复发生。

The ductile iron pincer seat made by QT400-15 was found cracks in tensile testing. It is confirmed as quality problem due to spheroidalization decaying happened in the mechanical testing and metallographic test. It is known that overtime casting resulted in this quality problem,At the same time,weakening of quality controlling consciousness in the cast factory is also one of the background reasons for this problem. The improving measures by carrying high quality management and production procedure quality control and personal training were adopted. Those actions have resulted in good effectiveness and avoided happening again of those types of problems.