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发明公开
CN102345050A 一种在氩站生产Q235B80-100mm规格保探伤、保性能的钢板方法 无效 - 撤回

一种在氩站生产Q235B80-100mm规格保探伤、保性能的钢板方法
摘要：
本发明公开了一种采取氩站上钢生产Q235B80-100mm规格保探伤钢板的方法，所述生产该规格钢板化学成分按质量百分比为：C：0.10～0.19%，Si：0.15～0.30%，Mn：0.50～0.80%，P≤0.023%，S≤0.015%，Als≤0.020%，N≤0.005%。本发明使用250mm厚度连铸坯生产的，其生产工艺流程为：铁水脱硫、120t顶底复吹转炉、氩站吹氩精炼、连铸、铸坯保温缓冷、钢板轧后保温堆冷、精整、检验、入库。与现有技术相比，本发明采取氩站上钢生产保探伤钢板，取消了常规LF精炼生产，缩短了生产流程及降低了吨钢成本；同时采取250mm厚度断面生产，与常规采取厚度＞250mm断面或模铸锭生产相比，提高了生产节奏，大大降低了生产成本。
摘要（英）：

The invention discloses a method for producing a flaw detection and performance guaranteed Q235B steel plate with 80-100mm employing argon station steel. The produced steel plate of the specification comprises chemical components of 0.10-0.19% of C, 0.15-0.30% of Si, 0.50-0.80% of Mn, P no more than 0.023%, S no more than 0.015%, Als no more than 0.020% and N no more than 0.005%. The invention employs a 250mm continuous casting billet; and a production process flow comprises steps of: molten iron desulphurization, treatment in 120t top-bottom combined blown converter, continuous casting, casting blank insulation and slow cooling, rolled steel plate stack cooling, finishing, examination and warehouse entering. Compared with a prior art, the invention employs argon station steel to produce flaw detection guaranteed steel plate, cancels a routine LF refining production, shortens a production flow and reduces costs per ton of steel; meanwhile, a 250mm thickness section is adopted in the production to increase production rhythm and substantially reduce production costs, compared with a routine section thicker than 250mm or mold ingot.

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