Fracture dissection method for acid-resistant pipeline steel

According to the method, a brand new fracture dissection method for acid-resistant pipeline steel is established, a defect sample fracture containing rich information is successfully obtained creatively through a new processing method for a target defect sample, and in combination with scanning electron microscope microanalysis and energy spectrum component analysis, most of crack defects of X60MS hydrogen-induced cracking are micro-shrinkage cavities and MnS inclusions, and the defect defects of X60MS hydrogen-induced cracking are small shrinkage cavities and MnS inclusions. Mfew metallurgical defects are oxide inclusions, and the metallurgical defects serve as hydrogen traps and become fracture sources. Aiming at the discovery, the quality control of the continuous casting billet needs to be enhanced in the material process machining process, and the occurrence of micro shrinkage cavities in the center of the casting billet can be avoided or reduced by adjusting and controlling the continuous casting proces