基本信息:
- 专利标题： 一种大壁厚海底管线钢用中厚板及生产方法
- 专利标题（英）：Medium plate for large-wall thick submerged pipeline steel and production method of medium plate
- 申请号：CN201410240035.2 申请日：2014-05-30
- 公开(公告)号：CN103993240A 公开(公告)日：2014-08-20
- 发明人： 谌铁强 , 丁文华 , 张国栋 , 李少坡 , 周希楠 , 万潇 , 白松莲 , 查春和 , 李家鼎 , 白学军 , 周德光 , 赵久梁 , 李涛
- 申请人： 秦皇岛首秦金属材料有限公司 , 首钢总公司
- 申请人地址： 河北省秦皇岛市抚宁县杜庄乡
- 专利权人： 秦皇岛首秦金属材料有限公司,首钢总公司
- 当前专利权人： 秦皇岛首秦金属材料有限公司,首钢总公司
- 当前专利权人地址： 河北省秦皇岛市抚宁县杜庄乡
- 代理机构： 北京华谊知识产权代理有限公司
- 代理人： 刘月娥
- 主分类号： C22C38/50
- IPC分类号： C22C38/50 ; C22C38/14 ; C21D8/02
The invention discloses a medium plate for large-wall thick submerged pipeline steel and a production method of the medium plate, belonging to the technical field of low-carbon microalloyed steel. The medium plate comprises the following components in percentage by weight: 0.025-0.045% of C, 0.10-0.35% of Si, 1.10-1.40% of Mn, less than or equal to 0.015% of P, less than or equal to 0.003% of S, 0.04-0.07% of Nb, less than or equal to 0.06% of V, 0.010-0.020% of Ti, 0.15-0.40% of Ni, less than or equal to 0.20% of Cr, less than or equal to 0.08% of Mo, 0.010-0.040% of Al, more than or equal to 2% of Al/N, and the balance of Fe and inevitable impurities. The method comprises the steps of blast furnace molten iron smelting, molten iron pre-desulfurization, smelting in a converter, LF+RH refining, plate blank continuous casting, plate blank heating, rolling in a 4300-type rolling mill, ACC quick cooling, cooling in heap, sampling, inspection, warehousing and dispatching. The medium plate has the advantages of stable mechanical property index, good medium plate and toughness matching property and excellent corrosion resistance.