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.
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:
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
Mn
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