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Tapered heavy reduction technology for plate mill

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Baosteel Technical Research 2012年第4期6卷 28-37页

作者： WANG Quansheng MIAO Yuchuan zhang suoquan Metallurgical Process Division Research Institute Baoshan Iron & Steel Co.Ltd. Heavy Plate Department Baoshan Iron & Steel Co. Ltd.

This paper describes the benefits, technical difficulties and disadvantages of the current heavy reduction solutions for plate production. For updated plate mills,this paper gives a better idea for the heavy reduction control in the rolling process. That is to keep the reduction amount constant in the front-end and back-end sections of the plate and to adopt tapered rolling with variable reduction in the middle section of the plate. This solution （ already applied for a patent） can not only fully utilize the capacity of the mill motors, but also prevent difficulties in plate biting caused by the conventional heavy reduction solutions with excessive draft. This technical solution has been implemented at the 5 m plate mill plant of Baosteel,and industrial tests have proved the feasibility of it. This paper presents and analyzes the industrial test data and proves that the tapered heavy reduction technology can reduce the number of rolling passes. In addition ,this paper looks forward to the future research in this area.

关键词： plate mill tapered rolling heavy reduction

Effects of finish rolling tension on strip width

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Baosteel Technical Research 2009年第3期3卷 54-57页

作者： zhang suoquan WANG Wei zhang Guomin ZHU Tao Metallurgical Process Division Baosteel Research Institute Baoshan Iron ＆ Steel Co. Ltd. Shanghai 201900 China Shanghai Baosight Software Co. Ltd. Shanghai 201900 China

Based on the practical data of a strip hot rolling line and the flow patterns of the rolling process, the principle of the effect of the tension between mill stands on the strip width was analyzed. The results show that the tension between the upstream mill stands has a significant effect on strip width. The width change takes place in the deforming region between two mill stands, the effect of back tension is more than that of forward tension, and the width narrowing takes place in the biting position of the back slip region. Reasonable tension and its gradient setup are therefore significant factors in the accuracy of the strip width control.

关键词： finish rolling tension width spread

Transformation of low carbon steel during deformation at γ/α temperature based on online rolling data

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Baosteel Technical Research 2012年第4期6卷 51-54页

作者： WANG Jintao zhang suoquan SUN Yezhong HE Xiaoming JIAO Sihai Hot Rolling Plant Baoshan Iron & Steel Co. Ltd. Metallurgical Process Division Research Institute Baoshan Iron & Steel Co. Ltd.

Alloying elements, such as silicon and manganese, have a major impact on the phase transformation point of steel. Specifically, manganese is an element for the expansion and stability of the austenite region, while silicon can expand and stabilize the ferrite region. Phase transformation occurs during the hot rolling process for the steel with certain silicon content, which leads to great changes of the deformation resistance, thereby affecting the rolling stability. Consequently, a better understanding of phase transformation in the rolling process will contribute to the enhancement of product quality. In this paper ,the on-line rolling data were processed by means of the inverse calculation method. In this method, the steel deformation resistance with various silicon and manganese contents was obtained and analyzed to determine the deformation behavior of the steel, which can help improve the on-line control model and enhance the steel quality.

关键词： phase transformation hot rolling deformation temperature rolling data deformation resistance

Improvement of Mechanical Properties of Cold Rolled High Strength DP-Steels Using Laboratory Scale Process Simulations

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Improvement of Mechanical Properties of Cold Rolled High Str...

第十届中国钢铁年会暨第六届宝钢学术年会

作者： Roik Jan Yan Bo zhang suoquan Zhu Xiaodong Jiao Sihai Bleck Wolfgang Steel Institute RWTH Aachen University R&D Center Baoshan Iron and Steel Corporation Ltd.

Laboratory process simulations are carried out to design the processing parameters of two high strength cold rolled DP steels. The hot rolling process is simulated by means of a Thermo-Mechanical-Treatment Simulator. Subsequently, specimens are cold rolled and intercritically annealed using a micro rolling mill and an annealing *** properties are determined with mini-tensile test specimens. Different hot rolling conditions aiming for bainitic or ferritic microstructures are adjusted by applying low and high coiling temperatures, respectively. The ferritic hot rolled microstructure contains a fraction of bainite and martensite which is aligned in bands parallel to the rolling direction. This banded microstructure is inherited to the final product,while for the bainitic hot rolling microstructure no banding is observed after processing. Both hot rolling procedures lead to a fine or ultrafine grained DP microstructure after cold rolling and intercritical annealing. The higher microalloyed grade has a grain size of 1.2 μm and contains 60 vol% martensite, whereas the other grade has a grain size of 2 μm and 70 vol% martensite. Both DP steels exhibit UTS of 1090 MPa and total elongations A12 of 13.5 %. Nevertheless, a slightly lower strength-ductility balance is observed for the ultrafine-grained DP steel.

关键词： dual phase steels laboratory process simulation hot rolling intercritical annealing

来源： cnki会议评论

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切割方式对直接淬火钢板的影响

金属热处理 2014年第11期39卷 121-124页

作者：姜洪生张所全韩剑宏宝山钢铁股份有限公司厚板部上海200941 宝山钢铁股份有限公司研究院上海201900

研究了20 mm厚60 kg级直接淬火钢板不同切割方式下切割区域附近组织和硬度的特点。结果表明,火焰切割后,在割口附近会形成明显的软化区域,而等离子切割和激光切割无明显软化区域;等离子割口和激光割口处会重新淬火,其硬度远高于远离割口... 详细信息

研究了20 mm厚60 kg级直接淬火钢板不同切割方式下切割区域附近组织和硬度的特点。结果表明,火焰切割后,在割口附近会形成明显的软化区域,而等离子切割和激光切割无明显软化区域;等离子割口和激光割口处会重新淬火,其硬度远高于远离割口处;火焰切割割口的热影响区域大于等离子切割和激光切割。考虑到等离子切割和激光切割的适应厚度范围以及热影响区域的大小,推荐采用等离子切割20 mm厚60 kg级直接淬火钢板。

关键词：切割方式直接淬火热影响区

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现浇混凝土预应力连续梁施工技术

市政技术 2010年第S2期28卷 256-258,262页

作者：宋子贤张锁全北京城建四建设工程有限责任公司北京100083

介绍了现浇预应力混凝土连续箱梁的施工技术,阐述了箱梁结构施工、模板制作、预应力张拉及箱梁支架搭设等施工要点。

关键词：预应力连续梁箱梁支架模板

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轧制边线形成过程的有限元分析

宝钢技术 2020年第1期13卷 21-25页

作者：张庆峰张所全宝山钢铁股份有限公司中央研究院上海201999

利用有限元软件对空冷后具有一定温度梯度的板坯的轧制过程进行数值模拟计算,研究分析两种不同高温力学特性的钢种在轧制时边角部金属的位移、应变及应力情况,分析边部线状缺陷起源的褶皱的形成过程并通过轧制试验予以验证。分析结果表... 详细信息

利用有限元软件对空冷后具有一定温度梯度的板坯的轧制过程进行数值模拟计算,研究分析两种不同高温力学特性的钢种在轧制时边角部金属的位移、应变及应力情况,分析边部线状缺陷起源的褶皱的形成过程并通过轧制试验予以验证。分析结果表明,边线形成与变形温度范围内变形抗力的不连续变化具有明显相关性,变形抗力随温度连续变化的钢种轧制过程角部金属不会形成褶皱;变形抗力随变形温度不连续变化的钢种,当板坯角部金属进入两相区时,由于轧制过程两相区变形抗力出现谷值,易出现褶皱并最终演变为边部线状缺陷。

关键词：边部线状缺陷变形抗力褶皱模拟

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浅谈清水混凝土施工技术的应用

市政技术 2010年第S2期28卷 263-265,295页

作者：马铨斌张锁全北京城建四建设工程有限责任公司北京100083

结合工程实际对清水混凝土结构的施工技术做了介绍,阐述了清水混凝土生产、现场施工、缺陷处理等施工要点。

关键词：轨道交通墩柱结构施工清水混凝土

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现代信息技术在工程建造过程中的应用

施工技术 2018年第A4期47卷 994-995页

作者：张锁全张志艳张寒北京城建集团有限责任公司北京100000

1工程概况本工程地上17个单体栋号,结构为框架-剪力墙结构。建筑功能为办公、会议。工程各专业体量大、系统复杂,功能要求高。1)工期极其紧张历经2个冬季和雨季,有效施工周期短。3个月时间完成全部主体结构、且在冬季施工,在占地面积广... 详细信息

1工程概况本工程地上17个单体栋号,结构为框架-剪力墙结构。建筑功能为办公、会议。工程各专业体量大、系统复杂,功能要求高。1)工期极其紧张历经2个冬季和雨季,有效施工周期短。3个月时间完成全部主体结构、且在冬季施工,在占地面积广的场地高效组织多分包施工,需要特殊方法快速解决动态现场的问题。2)超限高大空间多,斜屋面倾角41°。

关键词： BIM 流水段图纸会审深化设计二次结构支吊架