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天津钢管集团有限公司炼钢厂生产39Mn2V石油套管钢是采用EAF全程泡沫渣埋弧操作,EBT出钢合金化、LF复合精炼渣精炼,VD处理时间不小于12 min,连铸全程保护浇铸。连铸坯的平均w(O)为9.0×10-6,低倍组织均匀细致,表面质量良好,轧管各项技术指标均达到API SPEC 5CT要求。
The 39Mn2V oil casing steel manufactured by Tianjin Steel Tube Group Co., Ltd. is submerged arc welding using EAF foamy slag, EBT tapping alloying, LF composite refining slag refining, VD processing time is not less than 12 min, continuous casting protection and protection. The average w (O) of continuous casting billet is 9.0 × 10-6. The microstructure is uniform and fine. The surface quality is good. The technical specifications of the rolling pipe meet the requirements of API SPEC 5CT.