Production Practice of Improving Surface Quality of Corrosion Resistant Steel G7624 by Optimizing Concasting Parameters and Chemical Composition

王利伟; 贾育华; 王笑丹; 邸永田; 张治广; 田新中

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Production Practice of Improving Surface Quality of Corrosion Resistant Steel G7624 by Optimizing Concasting Parameters and Chemical Composition

更新时间：2026-01-21

- Production Practice of Improving Surface Quality of Corrosion Resistant Steel G7624 by Optimizing Concasting Parameters and Chemical Composition
- Special Steel Vol. 35, Issue 5, Pages: 40-42(2014)
- 作者机构：
  
  邢台钢铁有限责任公司技术中心,邢台,054027
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Received：21 April 2014，
  
  Online First：01 September 2022，
  
  Published：01 September 2014
- 稿件说明：
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王利伟, 贾育华, 王笑丹, et al. Production Practice of Improving Surface Quality of Corrosion Resistant Steel G7624 by Optimizing Concasting Parameters and Chemical Composition[J]. Special Steel, 2014, 35(5): 40-42.
DOI：

王利伟, 贾育华, 王笑丹, et al. Production Practice of Improving Surface Quality of Corrosion Resistant Steel G7624 by Optimizing Concasting Parameters and Chemical Composition[J]. Special Steel, 2014, 35(5): 40-42. DOI：

摘要

高合金耐蚀钢G7624(/%:≤0.08C

≤0.75Si

11.5~13.5Mn

≤0.045P

≤0.010S

13.0~14.0Cr

0.5~1.0Ni

1.5~2.0Cu

0.160~0.210N)Φ5.5 mm线材的生产流程为45 t脱磷铁水-(50 t EAF)-60 t AOD-LF-150mm×150 mm方坯连铸-修磨-轧制工艺。通过使用BHCD-200M低熔点、低黏度保护渣

结晶器冷却水量从1750~1850 L/min降至1600~1700 L/min

由二冷段单排水嘴改进为双排小锥度并行水嘴

比水量由0.25 L/t降至0.22L/t

消除了连铸坯的表面凹陷;将钢中C、Mn、N含量分别由0.064%

11.56%和0.195%调整至0.073%

12.45%和0.170%

提高钢中奥氏体稳定性

消除线材结疤缺陷。

Abstract

The production flow sheet for 5. 5 mm wire rod of high alloying corrosion resistant steel G7624 ( /% : ≤ 0.08C

≤ 0.75Si

11.5~13.5Mn

≤ 0.045P

≤ 0.010S

13.0-14.0Cr

0.5-1.0Ni

1.5-2.0Cu

0.160-0.210N) is 45 t dephosphorized metal-(50 t EAF)-60 t AOD-LF-150 mm x 150 mm billet concasting-grinding-rolling process. With using BHCD-200M low melting point and low viscosity shielding powder

decreasing mold cooling water rate from 1750-1850 L/min to 1600-1700 L/min

adjusting secondary cooling zone with single row water nozzles to double rows small cone angle and parallel water nozzles

and decreasing water rate from 0.25 L/t to 0.22 L/1

the surface depression defect of concasting billet is eliminated； with adjusting C

N content in steel respectively from 0.064%

11.56% and 0.195% to 0.073%

12.45% and 0.170% to increase the stability of austenite in steel

the scab defect of wire rod is also eliminated.

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