【摘要】 某热轧厂近期生产的X65管线钢在用户使用过程中出现较严重的横向裂纹,为此,通过对X65管线钢的金相组织观察和强度、延伸率、冲击韧性测试,分析了该钢组织结构和性能。结果表明,微观组织无明显偏析,连铸工艺参数选择不当是X65出现裂纹的主要原因。更多还原

【Abstract】 Severe transverse cracks occur in the X65 pipeline steel produced by the hot-rolling mill when customer processes them.Therefore,the structure and properties are analyzed by means of observation of the microstructure,the test of intensities,elongation and impact toughness.The results show that obvious segregation is not found in the microstructure and the main reason appeared crack in X65 steel is improper process parameters during the continuous casting.更多还原