共查询到20条相似文献,搜索用时 93 毫秒
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日本川崎钢公司研制成功一新型烘烤硬化高强度钢板。这种钢板在不添加任何元素进行的应变时效硬化处理后 ,具有惊人的抗拉和屈服强度以及卓越的抗冲撞性和较高的抗疲劳强度。其可加工成型性可与普通高强度钢板相媲美。具备上述独特性能的这种钢板 ,可用于制造汽车抗冲击部件和车体底盘部件 ,以减轻车体的重量。用应变时效硬化方法提高热轧薄钢板的抗拉强度@曹福永 相似文献
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随着汽车轻量化的发展,迫切需要在不降低汽车零部件性能的前提下,开发一些新工艺来减轻零件的重量。钢板热冲压是一种将先进高强度钢板加热到奥氏体温度后快速冲压,在保压阶段通过模具实现淬火并达到所需冷却速度,从而得到组织为马氏体、强度在1 500MPa左右的超高强度零件的新型成形技术。对钢板热冲压新技术的关键装备、核心技术和优缺点以及使用现状等做了系统介绍,并预测了热冲压技术的未来发展趋势。 相似文献
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《有色冶金设计与研究》2016,(6)
介绍了一种轧后通过控制水冷参数来控制基体组织均匀性的冷却工艺。通过对工艺过程的分析,以及与常规冷却方式的比较,认为:在厚钢板轧制过程中,采用TMCP技术,在控制加热温度、轧制温度和冷却水量的基础上,对厚度50~80 mm高强高韧抗层状撕裂钢板实施分段控制冷却及加速冷却的工艺控制,可以使TMCP态厚规格钢板也获得较优厚度方向的组织和性能。 相似文献
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采用扫描电镜(SEM)对不同颜色的氧化铁皮部位进行表面形貌和氧化铁皮厚度观察,同时检测钢板的力学性能,研究了轧制工艺对热轧钢板氧化铁皮的影响。结果表明:在保证钢板性能合格的前提下,适当提高终轧温度,可以改善氧化铁皮的塑性;优化轧制过程的除鳞制度,可以减薄终轧道次氧化铁皮的厚度。 相似文献
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文章对BTP500钢板的折弯和抗弹性能进行了检验和试验。厚度为6 mm、9 mm的BTP500钢板90°折弯试验结果满足要求;对比BTP500钢板分别采用铁素体焊丝和奥氏体焊丝焊接后的性能检测结果,采用铁素体焊丝焊接的钢板抗拉强度比采用奥氏体焊丝焊接的钢板高100 MPa以上。采用铁素体焊丝焊接的试板的-40℃冲击功为20~30 J,BTP500钢板焊接试验满足协议要求。在子弹侵彻时,工业化试制的6 mm、9 mm厚度的BTP500钢板均未被穿透,具有很好的防弹防侵彻能力,防弹性能满足协议要求。 相似文献
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研究了平整对罩式退火生产的BH钢板力学性能和自然时效性能的影响。结果表明,平整对BH钢的BH性能有显著影响,平整延伸率在1.0%~2.0%之间时BH值有最大值;平整使得BH钢的屈服强度先下降而后上升,屈服强度最小时的平整延伸率消除了钢板单向拉伸时的屈服点延伸现象;足够的平整延伸率是BH钢抗自然时效性能的有效保证。实验结果在工业生产中得到了应用。 相似文献
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在高强度钢板中,超低碳烘烤硬化钢板(简称BH钢板)是新型优质汽车用薄板.在生产BH钢板时,需要有效地控制屈服强度,以保证较好的深冲性能.采用四方图识别了影响屈服强度的关键因素,包括化学成分、热轧参数、冷轧参数等;基于大量的生产过程历史数据,分别用回归分析、神经元网络、决策树三种不同方法进行分析,建立各关键输入变量(KIV)对屈服强度(KOV)影响的多变量模型.以神经元网络模型为例,进行了模型评价.以该模型为基础,在已知某些KIV取值的情况下,能够较为准确地预测BH钢成品的屈服强度,合格率提高7个百分点,取得了较好的经济效益. 相似文献
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A further development of dual‐phase‐steels are represented by TRIP (transformation induced plasticity) ‐steels. TRIP‐steels contain austenite, which is metastable at room temperature. It transforms to martensite during straining (TRIP effect). This process improves the strength‐ductility balance of these steels. Two types of TRIP‐steels, low alloyed (L‐TRIP) and high alloyed (H‐TRIP), can be applied in sheet forming processes and exhibit different forming characteristics. Basing on results of uniaxial tensile tests and the evaluation of Young's modulus the forming limits in deep drawing processes and the component properties of deep drawn parts are discussed. The Young's modulus decreases significantly with increasing pre‐strain, especially demonstrated for the L‐TRIP material TRIP700. Forming limit curves determined at different forming temperatures indicate its influence on the forming limits. Martensite transformation is suppressed at a temperature of approximately T = 200 °C and therefore the major strain ?1 decreases significantly. For the investigated stainless steel AISI304 (H‐TRIP) different lubricant types in comparison to chlorinated paraffins have been tested. Lubricants consisting of sulphur additives led to good forming conditions in forming processes, even better than lubricants based on chlorinated paraffins. The evaluation of component properties, compared between L‐TRIP and H‐TRIP, was done based on the analysis of springback and dent resistance. The L‐TRIP material TRIP700 shows higher springback angles than AISI304 resulting from higher yield strength and decreased Young's modulus, resulting from the forming process. The dent resistance of TRIP‐steel was exemplarily demonstrated for AISI304. Uniaxial pre‐strained sheet specimen were analysed to show the dent resistance depending on dent depth. During elastic denting pre‐strain has no influence on dent resistance. Further increasing dent depth lead to increased dent forces for pre‐strained specimens. 相似文献
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鞍钢A220BH烘烤硬化冷轧钢板的开发 总被引:1,自引:0,他引:1
介绍了鞍钢A220BH烘烤硬化冷轧钢板的开发,研究了预应变,时效温度,保温时间对烘烤钢板硬化值的影响,测定了时效指数,试验证明,鞍钢生产的烘烤硬化钢板是屈服强度≥220MPa,具有适中烘烤硬化值及良好成形性汽车用钢板,能够灌汽车实际生产需要。 相似文献
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Effect of Prestrain on Microstructures and Properties of Si-Al-Mn TRIP Steel Sheet with Niobium 总被引:1,自引:0,他引:1
TANG Zheng-you 《钢铁研究学报(英文版)》2010,17(4):59-65
Paint baking treatment was carried out in a silicon oil bath at 170℃ for 20min for Si-Al-Mn TRIP Steel sheet with different prestrains,and effect of prestrain on microstructures and properties was studied before and after baking.The results show that with the increasing of prestrain amount during prestraining and baking,the volume fraction of retained austenite decreases,and the volume fraction of martensite and bainite increases as well as yield strength increases;as prestrain ranges from 0 to 4%,the baking-hardening(BH)value increases;while the prestrain ranges from 4% to 16%,the BH value decreases;when the prestrain amount is 4%,the highest BH value is about 70MPa for Si-Al-Mn TRIP steel sheet with niobium,which displays excellent baking-hardening behavior. 相似文献