| R3级海洋系泊链用钢大方坯连铸工艺优化 |
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| 引用本文： | 季克进,陈继红,陈君,王品,刘高丽.R3级海洋系泊链用钢大方坯连铸工艺优化[J].特殊钢,2009,30(6):42-44. |
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| 作者姓名： | 季克进 陈继红 陈君 王品 刘高丽 |
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| 作者单位： | 大冶特殊钢股份有限公司，1质量检验部;
2技术中心;
3四炼钢厂，黄石435001 |
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| 摘 要： | 通过将钢中Mn含量从1.55%～1.65%提高至1.75%～1.85%,用0.25%～0.35%Cr替代0.20%～0.25%Ni,并加入0.01%～0.04%Ti微合金化;RH真空精炼以控制N]≤80×10-6、O]≤15×10-6;连铸二冷水量由0.11 L/kg降至0.08 L/kg,并改变配水比例,使出坯温度由620～680℃提高至700～750℃,并采用连铸坯罩冷和钢材缓冷等工艺措施,降低了R3级系泊链钢的生产成本,避免了350 mm×470 mm铸坯纵裂的产生,并使钢材的强度和-20℃韧性均满足标准要求。
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| 关 键 词： | R3级海洋系泊链钢 大方坯连铸 工艺优化 |
| 收稿时间： | 2009-06-26 |
Optimization of Bloom Casting Process for R3 Grade Offshore Mooring Chain Steel |
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| Ji Kejin,Chen Jihong,Chen Jun,Wang Ping,Liu Gaoli.Optimization of Bloom Casting Process for R3 Grade Offshore Mooring Chain Steel[J].Special Steel,2009,30(6):42-44. |
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| Authors: | Ji Kejin Chen Jihong Chen Jun Wang Ping Liu Gaoli |
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| Affiliation: | 1 Quality Examination Department；
2 Technology Center；
3 No4 Steelmaking Works,
Daye Special Steel Corp Ltd, Huangshi 435001 |
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| Abstract: | With taking the technology measures such as increasing Mn content in steel from 1. 55% ~ 1.65% to 1,75% 〜1. 85% , replacing 0. 20% ~0. 25% Ni in steel by 0. 25% 〜0. 35% Cr, adding 0. 01 % ~0. 04% Ti for microalloying, controlling N] ≤80 x 10-6 and O] ≤15 x 10-6 by RH vacuum treatment, decreasing casting secondary cooling water rate from 0. 11 L/kg to 0. 08 L/kg and modifying water distribution ratio to increase temperature of bloom at outlet from 620 ~ 680 ℃ to 700 ~ 750 °C , bloom cooling with shielding and bar products slow cooling, the production cost of R3 grade mooring chain steel is reduced, the longitudinal cracks of 350 mm x 470 mm cast bloom are eliminated and the strength and the toughness at -20 ℃ of products all meet the requirement of standard. |
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