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带钢无头连铸连轧技术发展现状

河北冶金 2024年第2期 1-8页

作者：明章生栗克建曹鹏军冯毅朱斌马鸣图重庆科技学院冶金与材料工程学院重庆401331 中国汽车工程研究院股份有限公司重庆401122 宝武特冶航研科技有限公司重庆400080 中新(重庆)超高强材料研究院有限公司重庆401326

带钢无头连铸连轧技术(ESP)是在传统热轧工艺基础上进行改进的工艺,有更高的工作效率、成本优势和产品竞争力。连铸过程中,钢水在结晶器内有着复杂的热/力学行为,精确控制钢水在结晶器内的流动、传质、凝固、受力和溶质再分配,是保证铸... 详细信息

带钢无头连铸连轧技术(ESP)是在传统热轧工艺基础上进行改进的工艺,有更高的工作效率、成本优势和产品竞争力。连铸过程中,钢水在结晶器内有着复杂的热/力学行为,精确控制钢水在结晶器内的流动、传质、凝固、受力和溶质再分配,是保证铸坯质量的关键。本文介绍了ESP工艺的研究背景,阐述了其工艺优势和国内发展状况。在此基础上,着重分析了连铸结晶器中温度场的变化、保护渣的作用以及轧制时的温度场变化,为ESP工艺优化提供理论参考。通过对ESP工艺的优化设计进行深入分析,对产线中因高拉速造成的轧辊磨损快和难以批量生产特殊钢种的问题,提出在线换辊、一对一设计产线工艺参数以及保护渣化学成分,并结合ESP工艺特点及我国冷轧钢市场,对“以热代冷”的可行性进行了分析。认为,国内薄板钢“以热代冷”具有广阔的发展前景,但目前研发生产的“以热代冷”热轧板较少,仍需要进一步探索。虽然ESP工艺已经能生产超薄规格的热轧带钢(<1.0 mm),但却无法实现量产,对于相同化学成分的钢材,不同的铸造工艺也会有很大的显微组织及力学性能差异。目前,ESP工艺对板材内部组织转变的影响仍未建立一个完整的理论体系,钢材内部组织转变及合金元素扩散的影响将是未来研究的重点方向。

关键词： ESP 结晶器保护渣以热代冷组织转变合金元素

Research progress of aluminum alloy automotive sheet and application technology

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Engineering Sciences 2012年第4期10卷 29-34页

作者： ma mingtu You Jianghai Lu Hongzhou Wang Zhiwen China Automotive Engineering Research Institute Chongqing 400039 China Southwest Aluminum IndustryGroup Ltd. Chongqing 401326China Society of Automotive Engineers of China Beijing 100055China)

Pretrcatment technology is deeply discussed to explain its importance in guaranteeing properties and form- ability of aluminum alloy automotive sheet. Some typical applications of aluminum alloy automotive sheet to automotive industry are listed. Based on the author＇s knowledge and recognition and research progress presently, the important re- search contents about aluminum alloy automotive sheet are emphasized. Reducing cost and price of sheet and going deeply into application research are the main work for expending the application of aluminum alloy automotive sheet in the automobile.

关键词： automobile lightweight design aluminum alloy mechanical property formability pretreatment technology

On the automobile lightweight

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Engineering Sciences 2012年第2期10卷 71-77页

作者： ma mingtu Yi Hongliang Lu Hongzhou Wan Xinming China Automobile Engineering Research Institute Chongqing 400039 China Pohang University of Science and Technology Pohang 790784 Korea

The significance,description parameters,evaluation method,implement way and design for lightweight of automobile are comprehensively *** relationship among the performances of auto parts & components,the properties of materials and application of advanced technologies is also *** to recently related progress of lightweight and authors' research and developing work,lightweight of automobile is comprehensively and systematically overviewed.

关键词： lightweight of automobile evaluation method lightweight index performances of parts materials properties forming technologies

Numerical analysis on the shoot resistance of heat treated light weight B-grade bulletproof steel plates

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Engineering Sciences 2014年第5期12卷 14-20页

作者： ma mingtu Zhang Jingwen Zhang Junping China Automotive Engineering Research Institute CO.Ltd.

Bulletproof steel plates are widely used for the safety of special *** paper mainly researches on the shoot resistance of heat treated light weight B-grade bulletproof steel plates through numerical *** on the flow behavior of bulletproof steel plates and bullet at various high strain rates,finite element(FE) model has been set up using ANSYS/LS-DYNA *** simulation results are compared with the shooting results,which show a good consistency and a high ***,the simulation results are efficient approaches and strategies to decide and select the mechanical property and thickness of bulletproof steel plates,saving a lot of work and the cost of experiments.

关键词： bulletproof steel plates FE method shooting test

Study on high speed tension property of B-grade bulletproof steel

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Engineering Sciences 2014年第5期12卷 8-13页

作者： ma mingtu Fang Gang Feng Yi China Automotive Engineering Research Institute Co.Ltd.

In this paper, the high speed tension experiments have been performed on ultra high strength bulletproof steel. The specimen were cut from B-grade bulletproof steel sheet after hard-module quenching with thickness of 2.3 mm. The mechanical properties at strain rates of 0.001 s^-1, 0.01 s^-1, 0.1 s^-1 and 1 s^-1 were carried out on MTSS10, while those at higher strain rates of 200 s^-1, 500 s^-1 and i 000 s^-1 were tested on HTM5020 high speed tension tester and Hopkinson bar. The data from the high speed tension experiments were fitted via Johnson-Cook constitutive equation, and the fracture surface of each specimen was analyzed by scanning electron microscope （SEM）. The results indicate that, the shoot resistance capability of bulletproof steel is closely related to its strength, thickness and flow behaviors under high strain rate. The shoot resistance will be improved in the case of higher strength and better matching between strength and elongation. The Johnson-Cook constitutive equation fitted via experimental data provides fundament to numerical simulation. With the increase of strain rate, the size and depth of dimple trend to decrease and the depth of dimple changes less in steel with lower strength and higher elongation. The SEM analysis of fracture aspect is of benefit for further understanding of deformation and fracture mode under high strain rate.

关键词： B-grade bulletproof steel high speed tension constitutive equation fracture morphology

Analysis of surface orange peel of aluminum-alloy automobile sheet by using of EBSD and X-ray diffraction

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Engineering Sciences 2012年第6期10卷 7-11,37页

作者： ma mingtu Sun Zhifu Wang Zhiwen Lu Hongzhou Zhou Mingbo China Automotive Engineering Research Institute Co.Ltd. Chongqing New materials Engineering Center China Automobile Engineering Society Key Laboratory of Advance Forging & Stamping Technology and Science Yanshan University

The formation cause of orange peel of aluminum-alloy automotive sheet after tensile deformation was analysed by using X-ray diffraction and electron back-scattered diffraction(EBSD).The test results showed that formation cause of surface orange peel after tensile deformation related to product texture and nonuniform deformation during the tensile *** grain size has significant effect on deformation uniform and texture *** grains were easy to produce nonuniform deformation and texture,which would produce surface orange peel after tensile deformation.

关键词： aluminum-alloy automotive sheet orange peel texture EBSD X-ray diffraction

Comparison between the preparation,structure and mechanical properties of long fiber reinforced thermoplastics and short fiber reinforced thermoplastic

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Engineering Sciences 2012年第6期10卷 83-88,96页

作者： Fang Kun Yang Jie Wu Sizhu Li Mei ma mingtu The Key Lab of Beijing on Novel Polymer materials Beijing University of Chemical Technology Beijing Nashengtong Advanced materials & Technology Co.Ltd. Thermoplastic Composites Manufacturing & Processing Technology Center Technology Center of Great Wall Motor Company Limited Key Laboratory of Automotive Safety Integration & Smart Control of Hebei Province China Automotive Engineering Research Institute Co.Ltd.

This article summarizes the comparison between the preparation, structure and mechanical properties of long fiber reinforced thermoplastics （LFT） and short fiber reinforced thermoplastics （SFT）. Both of the experiment and theory results showed that the mechanical properties of long glass fiber reinforced thermoplastics pellets （LGFRT） have been enhanced better than that of short glass fiber reinforced thermoplastics pellets （SGFRT） manufactured by molding procession. After regulation of the relative humidity by 50 % , the mechanical properties of 30 % （ weight percent） short glass fiber content in SFT （ SFT-PA6-SGF30 ） are similar to that of 40 % long glass fiber content in LFT. Howev- er, the density of the latter is about 17 % lower than that of the former. Thus, the corresponding weight of products is reduced by 13 % ;output rate is increased by 21% , and the cost is therefore significantly lowered. And it has the fol- lowing advantages： impact strength is increased by 87 % ; the proportion is reduced by 20 % ; molding cycle is short- ened by 10 % ;materials cost is saved by 20 % -30 % and the final total cost is saved by 30 % -40 %. So LFT （LFT-PP-LGF40） can replace SFT （SFT-PA6-SGF30） with the similar basic mechanical properties under normal tem- perature or 160 ℃ lower.

关键词： long glass fiber reinforced thermoplastics short glass fiber reinforced thermoplastics mechanical properties comparison

The test device for heat friction coefficient of high strength steel

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Engineering Sciences 2012年第6期10卷 75-78页

作者： Sun Zhifu ma mingtu ma Fangwu Guo Yihui Song Leifeng Yao Zaiqi Chongqing New materials Engineering Center China Automotive Engineering Research Institute Co.Ltd. Geely Automobile Research Institute

Using high strength steel and ultra-high strength steel in hot stamping and automobile parts is one of the most important ways of the automobile lightweight,which is the development trend of automobiles *** this paper, the development of test device for heat friction coefficient by high strength steel can provide important technical parameters for hot stamping process,making the right selection of equipment types,mold design,technology optimization,and research and development of lubrication medium of press *** the same time,the experiments indicate that the instrument has not only accurate test result but also good repeatability.

关键词： automobile lightweight modern automobile heat friction coefficient

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汽车结构用钢的进展

汽车工程 2005年第3期27卷 269-273页

作者：马鸣图重庆汽车研究所

概述了汽车结构钢的研究进展,列举了与提高汽车、发动机可靠性相关的合金结构钢、调质钢、非调质钢、渗碳钢等钢种的发展;较详细论述了与汽车的轻量化、节能、降低排放、提高安全性等密切相关的高强度钢和先进高强度钢的研究概况、典型... 详细信息

概述了汽车结构钢的研究进展,列举了与提高汽车、发动机可靠性相关的合金结构钢、调质钢、非调质钢、渗碳钢等钢种的发展;较详细论述了与汽车的轻量化、节能、降低排放、提高安全性等密切相关的高强度钢和先进高强度钢的研究概况、典型应用以及今后的发展趋势。

关键词：汽车使用材料轻量化结构钢车身强度安全性