【摘要】 对无缝钢管产品水压实验过程中发生的9例典型爆裂事故产生原因进行了宏观和微观综合分析.结果表明:引发钢管产品水压实验爆裂均与管体局部存在某种缺陷有关.连铸坯缺陷包括表面裂纹、表面存在保护渣和增碳、表面渗铜、中心偏析和内部夹杂物偏聚等;轧管缺陷包括表面划伤、壁厚不均和偏薄等;管加工缺陷包括表面淬火裂纹、热处理组织异常、屈服强度偏低、管端螺纹加工精度差等.针对分析结果,提出了改进措施.更多还原

【Abstract】 Macroscopic and microscopic analyses were conducted for 9 typical bursting incidents in hydraulic tests of seamless pipe production.The analysis results show that bursting in the hydraulic tests is always related to some defects existing in some parts of pipes.Defects in continuous casting billets include surface cracks,surface slag and surface carburetion,surface copper infiltration,central segregation and internal inclusion segregation,etc.Defects existing in hot rolled pipes include surface scratches,ununiformity or reduction of wall thickness,and so on.Defects caused by tube processing include surface quench cracks,abnormal microstructure,low yield strength and low precision of thread machining of pipe ends.Suggestions for improvements are also provided according to the analysis results.更多还原