Recent Developments and Future Potentials of Near Net Shape Casting Belt Casting Technology
Recent Developments and Future Potentials of Near Net Shape Casting Belt Casting Technology
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近终形连铸带式连铸技术的最新进展及未来潜力
DOI：
10.4028/www.scientific.net/msf.638-642.3622
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发表时间：
2010
期刊：
影响因子：
--
通讯作者：
M. Schäperkötter
中科院分区：
文献类型：
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作者：
H. Fischer;M. Schäperkötter
如果以车身用钢和底盘用钢的要求作为评价新车身用钢是否适合的标准，那么材料成本就是材料选择的主要标准。其他标准包括此类新钢材的可用性、成熟程度以及现有汽车生产技术的可加工性。特别是最后一点，成型技术以及焊接技术，这里所有的热焊接技术，都是关键因素并发挥着重要作用，无论新的车身钢材能否在汽车上找到应用。其他重要的一点是碰撞性能、疲劳寿命和耐腐蚀性方面的可靠性，并且不要忘记对表面质量和腐蚀防护方面的可涂漆性要求。本文讨论的新型车身钢结合了优异的成形性和最高的强度。这种 HSD 钢（HSD = 高强度和延展性）提供了广泛的可能应用，例如：改进或减少阶段的生产技术。 HSD 钢可达到的高强度可以减少金属板材的厚度，从而减轻重量。 HSD 钢显示出较高的总伸长率，并且在形成部件后仍具有较高的残余伸长率，因此可以提高安全性；改善碰撞情况下的能量吸收的事实。不要忘记，HSD 钢由于密度较低（减少 5%）而具有额外的减重潜力。所有这些方面的共同点是，只有在部件设计阶段就考虑到这些独特的特征，才能充分发挥这种新型车身钢的潜力。从技术角度来看，HSD 钢具有广泛的应用范围。 Kuntz [1] 展示了在中型车身中示例性使用的一些可能性。这种HSD钢不能通过钢厂的常规生产路线生产。特别是由于化学成分中的元素可以与铸造粉末相互作用，降低铸造粘度并自行偏析元素，以及所生产的HSD钢具有降低的高温变形能力并需要高弯曲力，因此需要一种新的铸钢和钢生产工艺。
In case that the demands for car body steels and chassis steels are the standard for the assessment whether or not a new car body steel is fit for use, than the material costs are the main criteria for the material selection. Other criteria are the availability of such new steels, the degree of ripeness as well as the workability within existing automotive production technologies. Especially for the last point the forming technology as well as the welding technology, here all thermal welding technologies, are key factors and play an important role, whether or not a new car body steel will find its way in the car. Other important points are the reliability with regards to the crash performance, the fatigue life time and the corrosion resistance and not to forget the requests for paintability with regards to surface quality and corrosion protection. A new class of car body steels discussed in this paper combines excellent formability with highest strength. Such HSD-steels (HSD = High strength and ductility) offer a tremendous range of possible applications e.g. improved or stage reduced production technologies. The reachable high strengths of HSD-steels enable a possible reduction in sheet metal thickness and can therefore safe weight. An improved safety aspect can be derived from the fact, that HSD-steels show high values for total elongation and with the fact that after forming a component still have a high residual elongation; facts that improve the energy absorption in a crash situation. Not to forget, that HSD-steels offer additional weight saving potential due to there lower density (decreased by 5%). All those aspects common is the fact that the full potential of such a new class of car body steels can only be reached, when those distinctive features are already considered in the component design phase. From a technological point of view HSD-steels offer a great range of applications. Kuntz [1] shows some possibilities for an exemplary use in a mid size car body. Such HSD-steels can not be produced by a conventional production route in a steel plant. Especially due to the fact that -the elements of the chemical composition could interact with the casting powder, lower the casting-viscosity and are segregating elements by itself as well as the fact that the produced HSD-steel has a decreased high-temperature deformability and needs high bending forces -a new steel casting and steel production process is needed.