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对管线钢表面的夹渣缺陷进行了金相和电子探针分析。结果表明,钢板表面缺陷有保护渣的痕迹,有可能是炼钢过程中的保护渣掉入钢水中造成的,也有可能是板坯在加热过程中加热炉耐火材料崩裂落到钢坯表面造成的。
Metallographic and electron probe analyzes of slag inclusion defects on the surface of pipeline steel were carried out. The results show that there are traces of mold flux on the surface of the steel plate, which may be caused by the slag falling into the molten steel in the process of steelmaking. It may also be caused by the cracking of the refractory of the heating furnace on the surface of the slab during slab heating.