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采用宏观观察、微观电子扫描(SEM)以及金相组织分析等研究方法,对焦炉煤气风机叶轮断裂失效原因进行分析。结果表明,由于叶轮所处环境及工作过程中所受的拉应力作用,风机叶轮在应力腐蚀作用下开裂。另外,热处理工艺不当以及焊接缺陷是造成叶轮失效的促进因素。针对以上原因提出改进措施,防止类似事故再次发生。
By means of macroscopic observation, microscopic scanning electron microscopy (SEM) and microstructure analysis, the failure causes of rupture of coke oven gas fan impeller were analyzed. The results show that due to the impeller environment and the tensile stress during the work process, the fan impeller cracking under stress corrosion. In addition, improper heat treatment and welding defects impede impeller failure. For the above reasons, propose improvement measures to prevent similar accidents from happening again.