汽车用钢板的研究与开发

本文评述了低合金高强度钢、高强度可焊钢板和耐磨板等汽车用钢板研究开发的现状及发展。     

汽车用高强度钢板及镀锌板的现状和发展

综述了国内外汽车用高强度钢板、超细晶粒钢板、镀锌钢板的研究、应用和最新进展,并分别对热轧和冷轧高强度钢板、超细晶粒钢板的工艺机理、组织性能、成形技术、焊接技术、成形件的韧性和强度试验以及评价方法、在汽车上的应用等进行了系统的分析.     

大型石油储罐用高强钢板现状

总结了国内外原油储罐用高强度铜板开发、生产和应用情况;分析了国内钢铁企业在工艺技术开发、实物质量和配套工艺开发等方面与国外钢铁企业存在的差距。建议国内钢铁企业在成功开发610 MPa级高强度钢板基础上进一步提高钢板综合性能,以促进我国石油储罐用高强度钢板的开发和应用技术的进程。     

汽车用高强度钢板的最新研究进展

应用高强度、高性能钢板是汽车减轻质量、提高安全性的基础。为适应汽车工业发展的需要，利用各种强化机制的多种组合开发出具有各种不同性能的高强度钢板。简述了高强度汽车用钢板的最新研究进展，包括热轧钢板、冷轧与热镀锌钢板、以及TWIP钢等。     

新日本钢铁公司高强度汽车用钢板的开发

在对汽车提高燃料利用率、节能和提高冲撞安全性的要求日益强烈的情况下,不增加车体重量而提高安全性的方法之一,就是使用高强度钢板.钢板高强度化带来的最大问题就是钢板加工性能变差.为适应用户的要求,新日铁已经开发出各种高强度钢板.本文对适应于汽车不同部位的、具有良好成形性的各种高强钢板的特点及冲撞吸收能、疲劳强度等特性进行了介绍.     

武钢渐成精品名牌汽车板基地

武钢公司多年来大力研制开发汽车专用钢板,“六五”至“九五”期间,已设计研制开发出汽车专用钢板１０大系列３３个品种,销售汽车专用钢板２２０余万ｔ。该公司自一米七轧机工程投产以来,就致力于汽车专用钢板的开发与生产,成功地生产了０８Ａｌ系列冷轧钢板、含磷高强度冷轧钢板、含钛高强度热轧钢板等汽车专用钢板品种,形成了对汽车厂批量生产供货能力。“九五”期间,武钢加大了开发汽车专用钢板新产品力度,研制推广了超深冲ＩＦ钢板、微碳深冲冷轧板０３Ａｌ、烘烤硬化钢板、冷轧冲压用高强度钢板和深冲ＩＦ钢、微碳深冲及合金化…     

高强度钢板在汽车车身上的应用及问题对策

主要介绍高强度钢板使用量增加背景、已开发或正在开发的种类、高强度钢板在汽车车身上的应用以及高强度钢板使用中存在的主要问题及其对策等。     

具有良好冷加工性能的新型高强度薄板

据“Stahl und Eisen”特集1990年9月报道,在过去的几年中,开发了数量众多的具有良好冷加工性能的高强度钢板,这些钢板在汽车工业中得到了成功的应用。提高强度的研究和在热镀锌厂进行的淬火时效试验为高强度热镀锌钢板的开发奠定了基础。在     

利用实现超细微晶粒化的动态再结晶工艺加工高强度优质热轧钢板

以冲撞安全性和车体轻量化为目标，近年来一直在提高汽车用钢板高强度化的指标。然而正如图1所示那样，一般而言，若增大钢板强度，则其延伸率、扩孔率等成形性就会下降。这一问题阻碍了高强度钢板的应用。因此，开发兼备高强度与良好成形性的汽车用钢板是当务之急。     

高强度捆包带用冷轧板的研制开发

以C、Mn元素作为主要强化元素,通过成分设计,控制热轧、冷轧,研发880MPa和980MPa级捆包带用高强度冷轧钢板。并分析了试制工艺对钢板组织性能的影响,发蓝热处理工艺对钢板塑性的影响。总结了马钢高强度捆包带用冷轧钢板的开发研制过程。     

汽车钢板点焊工艺的发展

通过文献调研分析了冷轧、镀锌及高强汽车板的焊接特点。采用普通点焊工艺,铁锌合金镀锌板比纯镀锌板点焊工艺窗口宽约30%,但预热后纯镀锌板焊接性能较好;FEA模拟Mn-Si系TRIP800钢的焊点十字拉伸强度明显高于Mn系DP450钢,但实际试验结果却明显较低;Mn系1.5mm规格的DP800钢在点焊电流11 000A及时间0.6s时,焊点拉剪试验以韧性特征为主,焊点拉剪力高于20kN。1 300MPa热成型钢点焊接头有一定软化倾向。不同种类高强钢的合金元素含量和生产工艺的不同,其焊接性能体现出较大差异。     

鞍钢高品质汽车板的研制开发

介绍了鞍钢目前已经开发出的以IF钢为代表的深冲钢系列品种,以烘烤硬化钢为代表的高强深冲钢系列品种,以DP、TRIP钢为代表的先进高强钢系列品种,以05板为代表的高表面质量的冷轧板系列品种,并根据用户的个性需求,开发出了具有不同特性的冷轧钢板。今后,鞍钢将通过新一代汽车用钢的开发和应用技术研究,为汽车行业的轻量化进程提供有力的技术支持。     

Research of DP600 high strength steel wheels

Steel has been used as a traditional wheel materials for a long time.Before 1980’ s,over 90% wheels were made of steels.Then,the yield strength of wheel steels increased gradually from 240 -350 MPa to 600 MPa or higher.The advanced high strength steels become the main wheel materials.Since 1990’s,DP600 has been broadly applied in steel wheels oversea.However,there was little research of application of high strength steel wheels(especially wheel disc) in domestic wheel industrial.In presence, DP600 steel wheel is only developed in FAWSH by using imported CKD.Other domestic steel wheel manufacturers did little work on high strength DP600 wheel discs.Baosteel wheels Co.Ltd.is the first domestic company producing DP600 steel discs and has become the leading company in production of high strength wheel.Because of the high strength of DP600,its formability,springback,and wrinkle have become the keys of the successful application of DP600 steel.In this paper,the metallurgical and mechanical properties are firstly introduced and formation problems of DP600 are described compared to traditional steels.Secondly,FLD analysis has been done.Wrinkle and more springback are recognized.To solve these problems,an optimized solution is designed and the good result is obtained.The test has shown that the fatigue property of steel wheel discs made by DP600 have been greatly improved.     

S32760超级双相不锈钢冷轧板的组织和性能

设计及制备了2mm厚S32760超级双相不锈钢冷轧板。对国产及进口冷轧板的化学成分、常温力学性能、金相组织、杯突值、应变硬化指数、腐蚀性能及焊接性能进行了对比测试。结果表明,国产板材各项性能指标达到ASEMSA240标准及工程指标要求,与进口板材相当,可以替代进口产品用于相关设备的生产及制造。     

高强度薄钢板研究的新进展及其在汽车上的应用

通过分析钢板强化机制，并结合国内外高强度薄钢板研究的最新进展，分别就热轧和冷轧高强度薄钢板的组织成分特征、产品性能、生产工艺特点以及在汽车上的应用等进行了全面的研讨。将有益于提高我国高强度薄钢板生产技术水平，进一步促进高强度薄钢板在汽车上的应用。     

Metallurgical aspects in cold rolled high strength steel sheets

Cold rolled high strength steel sheets with yield strength from 300 to 500 N/mm² have been developed by using conventional equipment for producing commercial cold rolled steel sheet, that is, cold rolling, box annealing, and temper rolling. Effective alloying elements for strengthening are carbon, silicon, manganese, phosphorus, niobium, etc. The sheets up to 400 N/mm² yield strength grade are easily produced by selecting appropriate chemical compositions. The sheets with higher yield strength grade than 450 N/mm² are obtained by introducing the new idea that the steel with more than 2 pct manganese is annealed between A₁ and A₃ transformation temperatures, and moderately temper rolled. Increase of tensile strength does not affect deep drawability while it deteriorates stretch-forming and stretch-flanging properties. As for electric resistance spot welding, shear tension strength increases in proportion to tensile strength, but cross tension strength hardly increases or tends to decrease. These sheets have been applied to door beams and bumper reinforcements.     

Effect of water quenching processing parameters on the mechanical properties of a cold-rolled C-Mn-containing steel sheet

Cold-rolled advanced high-strength steel sheets have become the material of choice for the automotive industry because of their unique attributes of high strength and balanced mechanical properties. High-hydrogen gas jet cooling and water quenching are the most commonly used ultrafast cooling technologies for producing martensite-containing high-strength steel sheets. The water quenching technology ensures the fastest industrial cooling rate of 1 000 K/s; therefore,it has the highest potential with respect to saving alloys. In this study,the water quenching of a C-Mn-containing steel sheet is simulated during continuous annealing to investigate the effect of water quenching and tempering parameters on its mechanical properties. The results reveal that at low quenching temperatures,the strength of the steel sheet decreases as the soaking temperature increases. However,at high quenching temperatures,a high soaking temperature corresponds to increased strength after quenching,regardless of whether the material was austenitized in the single austenite zone or the inter-critical zone. Therefore,a high quenching temperature always results in a high strength and a high yield ratio after quenching. Low-temperature overaging( tempering) considerably influences the yield strength and yield ratio,and the extent of this influence is correlated with the soaking temperature.     

汽车轻量化与先进的高强度钢板

介绍了国际汽车轻量化项目及其主要研究结果，着重论述了先进高强度钢板(AHSS)的生产、特点及其使用，结合国内汽车工业和宝钢的实际情况，探讨了今后在汽车轻量化过程中所应开展的工作。     

轧制高强钢用新型冷轧工作辊的开发及其应用

针对高强钢、超高强钢的轧制生产需求,通过合金成分设计和制造工艺开发,研制出轧制高强钢用新型冷轧工作辊,工作层的耐磨性能以及辊体的强韧性得到显著改善。现场使用结果表明：单周期平均轧制吨位提高了约40%,单次下机磨削量降低了约7%,使用性能优于进口的同类型冷轧工作辊。新型冷轧工作辊适用于汽车用高强钢的轧制生产,硅钢、不锈钢及其他难轧板材等也有广泛的应用前景。     

High performance nano-structured stainless steel sheet

High-strength steels have been attracting more and more attention of people,Unfortunately.deterioration of ductility limited their applications.To solve this problem,a nano-structured stainless steel sheet is developed to combine high strength and high ductility.Processing of the surface mechanical attrition treatment(SMAT) was introduced to obtain a nano-grain layer on the double surface of the stainless steel sheet.The microstructure of the nanostructured steel sheet is characterized by an alternate distribution of coarse grained layer and nanocrystalline layer.Then the dual surface nano-crystallized stainless steel sheets were co-warm rolled at 500℃.The experimental results reveal that the mechanical properties of the nanostructured steel exhibit high yield strength in the range of 700 -950 MPa and tensi le strength higher than 930 MPa.Moreover,elongation to fracture reaches to 15%-48%, together with a uniform elongation stabilized to 13%-45%.