湘钢提高特厚钢板内部质量生产实践  

Practices of improving the quality of extra thick steel plate

作　　者：唐卫红[1] 

机构地区：[1]湖南华菱湘潭钢铁有限公司,湖南湘潭411101

出　　处：《炼钢》2012年第3期42-44,共3页Steelmaking

摘　　要：通过优化LF渣系,VD和LF的吹氩制度以及连铸的工艺参数,有效地提高了钢水的洁净度和板坯质量,优化后钢水中w(P)≤0.015%、w(S)≤0.003%、w(O)≤4×10-6、w(H)≤1.3×10-6、w(N)≤40×10-6。板坯的中心偏析和疏松均为C类1.0级,钢板中心偏析和疏松均为C类0.5级;钢板平均探伤合格率提高了3.15%,探伤合格率最高达到了99.51%。The cleanliness of the liquid steel and quality of the slab are effectively raised by way of optimization of the LF refining slag series, the argon bubbling schedule of VD and LF furnace and the processing parameters of continuous casting. Since optimization the aim of w（P）≤0. 015 %,w（S）≤0.003 %,w（O）≤4 ×10-6 ,w（H）≤1. 3 × 10-6. w（N）≤40× 10-6 in the hot metal has already been achieved. Both the central segregation and porosity of the slab arrive at grade 1.0 of category C and the average qualified ratio of ultrasonic flaw detection of the steel plate rises by 3.15 % and the highest quali- fied ratio of ultrasonic flaw detection attains 99. 51%.

关 键 词：优化 工艺 内部质量 特厚钢板 

分 类 号：TF762[冶金工程—钢铁冶金]