低合金高强度结构钢Q345B特厚板的复合轧制工艺

特殊钢 ›› 2014, Vol. 35 ›› Issue (4): 31-33.

低合金高强度结构钢Q345B特厚板的复合轧制工艺

陈振业¹, 张晓力¹, 张雲飞¹, 物跃辉², 韦明³, 李红文³

1河北钢铁技术研究总院,石家庄050000；
2唐山学院机电工程系，唐山063000；
3河北钢铁集团舞阳钢铁有限责任公司科技部,平顶山462500

收稿日期:2014-02-15 出版日期:2014-08-01 发布日期:2022-09-03
作者简介:陈振业(1983-),男，硕士(武汉科技大学)，工程师,2006年武汉科技大学(本科)毕业，新产品新工艺的研究和开发。

Pilot Production of High Strength Low Alloy Steel Q345B Supper-Heavy Plate by Compound-Rolling Process

Chen Zhenye¹, Zhang Xiaoli¹, Zhang Yunfei¹, Yang Yuehui², Wei Ming³, Li Hongwen³

1 Hebei Central Iron and Steel Technology Research Institute, Shijiazhuang 050000;
2 Department of Electrical and Mechanical Engineering, Tangshan College, Tangshan 063000；
3 Technology Department, Wuyang Iron and Steel Co Ltd, Hebei Iron and Steel Group, Pingdingshan 462500

Received:2014-02-15 Published:2014-08-01 Online:2022-09-03

摘要/Abstract

摘要： 去除两块规格为(/mm)210×1 630×2 570的Q345B钢连铸坯待复合面上氧化铁皮,开环周坡口,叠放并焊接在一起得到(/mm)415×1 630×2570的复合坯。对复合腔抽真空、密封、加热至1 220~1 260℃和在1 150℃轧制成100 mm特厚板,前3道次总压下率大于40%,终轧980℃。检验结果表明,Q345B钢复合板各项力学性能均达到GB6396-2008和GB1591-2008的要求,抗拉强度530~535 MPa,屈服强度325 MPa,伸长率27.5%~28.0%,厚度Z方向抗拉强度为520~530 MPa,断面收缩率30.0%~60.5%,界面组织结合率99%以上,拉伸试样断口为混合断裂和少量韧性断裂,冷弯性能良好。

Abstract: The compound-slab (/mm) 415 x 1 630 x2 570 for compound-rolling is got by removing the scale of awaiting compound-rolling faces of double (/mm)210 x 1 630 x 2 570 Q345B steel casting slabs, cutting circle welding V and welding together. By vacuum-pumping compound-slab cave, packing and heating to 1 220 ~ 1 260 °C the compound-slab is rolling at 1 150 °C to 100 mm supper heavy plate with total reduction more than40% in preceding three passes, and finishing rolling at 980 T. Examination results show that all mechanical properties of Q345 steel compound plate meet the requirements of GB6396-2008 and GB1591-2008, that is its tensile strength 530 -535 MPa, yield strength 325 MPa, elongation 27. 5% ~28.0%, thickness Z direction tensile strength 520 ~530 MPa and reduction of area 30.0% ~ 60. 5%. The ratio of bonding interface of compound-plate is more than 99%, and the tensile specimen fracture is mixing fracture and a small amount of toughness fracture with nice cold-bending performance.

陈振业, 张晓力, 张雲飞, 物跃辉, 韦明, 李红文. 低合金高强度结构钢Q345B特厚板的复合轧制工艺[J]. 特殊钢, 2014, 35(4): 31-33.

Chen Zhenye, Zhang Xiaoli, Zhang Yunfei, Yang Yuehui, Wei Ming , Li Hongwen. Pilot Production of High Strength Low Alloy Steel Q345B Supper-Heavy Plate by Compound-Rolling Process[J]. Special Steel, 2014, 35(4): 31-33.