Abstract: Nb microalloying high strength ship plate was produced by 100 t converter-100 t LF-200 mm x 1 500 mm caster-2800 mm medium plate mill flow sheet at Anyang Steel. Production data statistic results showed that with precisely controlling chemical composition of steel ( % : 0. 13 ~0. 16C, 0. 33 ~0. 43Si, 1. 31 ~ 1.42Mn, 0. 007 〜0. 014P, 0. 005 〜 0. 018S, 0. 021 ~0. 039Al, 0. 018 -0. 022Nb) , beginning finish rolling at 950 °C , total reducing ≥50% in finish rolling, and end finish rolling at 780 ~ 850 °C , the grain size rating of 6 〜25 mm steel plate of grade AH36 was 9 ~ 9. 5, yield strength 360 ~475 MPa, tensile strength 490 〜610 MPa, 85 elongation 18% 〜36% and impact energy at 0°C 110 〜221 J.

Key words: Nb Microalloying, High Strength Plate, Control Rolling

摘要： 安阳钢铁公司通过100 t转炉-100 t LF-200 mm×1 500 mm连铸机-2800 mm中板轧机生产流程开发了Nb微合金化高强度船板。生产数据统计结果表明,通过精确控制钢的成分(%:0.13～0.16C、0.33～0.43Si、1.31～1.42Mn、0.007～0.014P、0.005～0.0185、0.021～0.039A1、0.018～0.022Nb),精轧开始温度950℃,精轧累积压下率≥50%,终轧温度780～850℃,使AH36牌号6～25 mm钢板的晶粒度为9～9.5级,屈服强度360～475 MPa,抗拉强度490～610 MPa,δ5伸长率18%～36%,0℃冲击功110～221J。

关键词: Nb微合金化, 高强度钢板, 控制轧制