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发明公开
CN101994061A 一种石油套管用钢及其制造方法 无效 - 撤回

一种石油套管用钢及其制造方法
摘要：
本发明涉及一种石油套管用钢及其制造方法。该发明化学成分为：碳：0.16～0.21wt％；硅：0.10～0.40wt％；锰：0.60wt％～1.20wt％；铌：≤0.04wt％；钛：0.010～0.020wt％；Cr：0.30～0.40wt％；磷：≤0.020wt％；硫：≤0.008wt％；铝：0.02～0.06wt％；其它为铁和不可避免的微量杂质。生产工艺步骤：：铁水预处理→转炉炼钢→LF炉精炼→板坯浇注→钢坯精整→入库、检验→加热炉加热→控制轧制→控制冷却→卷取→检查、入库。采用本发明生产的石油套管用钢热轧板卷，降低了生产成本，且力学性能稳定，焊接使用性能优良。
摘要（英）：

The invention relates to steel for a petroleum casing pipe and a manufacture method thereof. The steel comprises the following chemical components of 0.16-0.21 wt percent of carbon, 0.10-0.40 wt% of silicon, 0.60-1.20 wt% of manganese, not more than 0.04 wt % of niobium, 0.010-0.020 wt% of titanium, 0.30-0.40 wt% of Cr, not more than 0.020 wt% of phosphorus, not more than 0.008 wt% of sulfur, 0.02-0.06 wt% of aluminum and the balance of iron and inevitable trace impurities. The manufacture method comprises the steps of: molten iron preprocessing, convertor steelmaking, low-frequency (LF) furnace refining, blank pouring, billet finishing, warehousing and checking, heating through a heating furnace, controlled rolling, controlled cooling, reeling, inspecting and warehousing. A steel coil is formed by heat rolling of the steel for the petroleum casing pipe, thus the production cost is lowered; and the steel coil has stable mechanical property and excellent welding using property.

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