Practice of Process for Steelmaking of N80-1 Oil Casing Pipe Steel by 80 t Converter-LF-VD-CC Flow Sheet

Special Steel ›› 2010, Vol. 31 ›› Issue (5): 33-35.

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Practice of Process for Steelmaking of N80-1 Oil Casing Pipe Steel by 80 t Converter-LF-VD-CC Flow Sheet

Zhang Yong^1,2 , Kang Jianguang² , Ren Huan², He Minghui²

1. School of Materials and Metallurgy, Northeastern University, Shenyang 110000；
2. Technical Department, Heilongjiang Jianlong Iron and Steel Co, Shuangyashan 155100；

Received:2010-03-23 Online:2010-10-01 Published:2022-11-11

80 t转炉-LF-VD-CC流程冶炼N80-1石油套管钢的工艺实践

张勇^1,2，康建光²，任焕²，何明辉²

1. 东北大学材料与冶金学院，沈阳 110000；
2. 黑龙江建龙钢铁有限公司技术处,双鸭山 155100;

作者简介:张勇(1978-)，男，2008年东北大学毕业，技术处处长。

Abstract

Abstract: The N80-1 oil casing pipe steel (36Mn2V, % : 0.34-0.38C, 0.25-0.40Si, 1.45-1.70Mn, ≤ 0.020P, ≤ 0.015S, 0.01 -0.04Al, 0.11-0.16V, (Sn + Sb + As + Pb + Bi) ≤ 0.035, [O] ≤ 35 x 10^-6, [N] ≤ 80 x 10^-6, [H] ≤ 2.5 x 10^-6 is melted by 80t top and bottom combined blown converter-LF-VD-Φ210 ~ 270 mm round bloom casting process. With process measures such as catch carbon and reblow practice, controlling end [C] , controlling rephosphorization W0. 008% at tapping, and using basicity 3.2-4.0 refining slag, the P content in steel is 0.012%-0.019% , S is 0.003%-0.005%, while [O] (11 -22) x 10^-6, [N] (39 ~76) x 10^-6 and [H] (1.5-2.1) x 10^-6, and the analysis, structure and properties of steel are all meeting the requirements of consumer and standard API Spec 5CT.

Key words: Converter, N80-1 Oil Case Pipe Steel, Process Practice

摘要： N80-1石油套管钢36Mn2V(%):0.34～0.38C、0.25～0.40Si、1.45～1.70Mn、≤0.020P、≤0.015S、0.01～0.04Al、0.11～0.16V,(Sn+Sb+As+Pb+Bi)≤0.035,[O]≤35×10^-6,[N]≤80×10^-6,[H]≤2.5×10^-6由80 t顶底复吹转炉-LF-VD-Φ210～270 mm圆坯连铸工艺冶炼。通过高拉碳补吹氧、控制终点[C],控制出钢回磷≤0.008%,使用碱度3.2～4.0的精炼渣系等工艺措施,使该钢P为0.012%～0.019%,S为0.003%～0.005%,[O](11～22)×10^-6,[N](39～76)×10^-6,[H](1.5～2.1)×10^-6,其成分、组织和性能均达到用户以及API Spec5CT标准要求。

关键词: 转炉, N80-1石油套管钢, 工艺实践

Zhang Yong , Kang Jianguang , Ren Huan, He Minghui. Practice of Process for Steelmaking of N80-1 Oil Casing Pipe Steel by 80 t Converter-LF-VD-CC Flow Sheet[J]. Special Steel, 2010, 31(5): 33-35.

张勇, 康建光, 任焕, 何明辉. 80 t转炉-LF-VD-CC流程冶炼N80-1石油套管钢的工艺实践[J]. 特殊钢, 2010, 31(5): 33-35.

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Practice of Process for Steelmaking of N80-1 Oil Casing Pipe Steel by 80 t Converter-LF-VD-CC Flow Sheet

80 t转炉-LF-VD-CC流程冶炼N80-1石油套管钢的工艺实践

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