超轻型汽车车轮钢SW400的研制与开发.pdfVIP

1超轻型汽车车轮钢 SW400 的研制与开发 吴 刚 （本钢技术中心，本溪 117000 ） 摘 要 轻量化、安全化、高性能化是汽车工业中先进高强钢应用量稳定增加的驱动力。介绍了在普通C、Mn 钢 基础上，通过两轮工业试生产实验，研究了利用变形诱导铁素体相变（DIFT ）理论获得超细晶粒铁素体组织，晶 粒尺寸为3～5μm 。得出了：超细晶钢SW400 在车轮上应用效果良好，据用户反应，本钢研制的超轻型汽车车轮钢 SW400 钢板的内在质量良好，成分均匀，强度高，韧性好，成形性能优良，焊接性能好，疲劳寿命高，在车轮总 成重量减重达21% 的条件下，各项性能指标满足制作高档汽车轮辐和轮辋的技术要求，其实物质量居国际先进水平， 产品全部用于出口。 关键词 轻量化 超细晶粒 车轮钢 Research and Development of Ultra-light Automotive Wheel Steel SW400 Wu Gang (Technical Center of Benxi Iron Steel Co., Ltd., Benxi, 117000) Abstract Lightweight, security and high performance are the driving force for advanced high strength steel in automotive industry. Introduced at the basic of plain C-Mn steel, after twice industrial tests , the study result shows that ultrafined ferrite can be achiebed by using the theory of deformation induced ferrite transformation, and the grain size is 3~5μm. Obtained ultrafined grain steel SW400 has been developed and used on the wheel. The feedback from user is that advanced high strength steel SW400 produced by Benxi Steel has uniform composition, high strength, high toughness, good formability, good welding performance and high fatigue life. The weight of wheel assemibly is reduced 21% on the condition that all the properties satisfy technical specifications of upscale automotive wheel rim and spoke, and the quality reaches the international advanced level. All the products are exported. Key words lightweight, ultrafined grain, wheel steel 近年来，世界汽车工业面临着能源、环境和安全三大越来越严峻的问题。减轻汽车自重、降低能耗、噪 ［］ 声、减少废气排放，成为各大汽车生产厂家提高竞争力的关键。因此汽车制造厂需要生产重量更轻的汽车 1 。 在汽车轻量化的潮流中，铝、镁和塑料等材料的使用比率正在逐渐增加。然而，以高强钢材料为代表的钢材， 因其所具有的