超高强钢构件热冲压成形技术与应用

Hot Stamping Technology and Application of Ultra-high Strength Steel Components

热冲压能够显著提升超高强钢板材成形性能、减小变形抗力和回弹,是实现汽车轻量化和关键性能提升的重要途径。近年来超高强钢热冲压技术发展迅猛,市场需求巨大,新型热冲压工艺装备随之成为相关制造领域的研究热点。本文首先从形变规律与本构模型、相变规律与相变模型、损伤断裂行为与判定准则等方面综述了超高强钢构件热力耦合形变-相变机理;其次,对传统热冲压、高强韧等强度热冲压、变强度热冲压等热冲压成形工艺进行了详细阐述和分析。然后,结合热冲压工艺特点和实际生产需求,介绍了伺服压力机、热冲压模具、加热设备及生产线等最新发展;最后,针对双碳战略、人工智能等国内外形势,对超高强钢热冲压产业需求和发展趋势进行了展望。

Hot stamping can significantly improve the formability of ultra-high strength steel sheets,reduce deformation resistance and springback,which is an important way to achieve automotive lightweight and key performance.In recent years,hot stamping technology has developed rapidly and the market demand is huge and New hot stamping process and equipment has become a research hotspot in related manufacturing fields.In this work,the thermodynamic coupling deformation-phase transformation mechanism of ultrahigh strength steel members is reviewed from the aspects of deformation law and constitutive model,phase transformation law and model,damage and fracture behavior and criterion.Secondly,the traditional hot stamping,high strength and toughness hot stamping,variable strength hot stamping and other hot stamping forming processes are described and analyzed in detail.Then,according to the characteristics of hot stamping process and actual production demand,the latest development of servo press,hot stamping die,heating equipment and production line are introduced.Finally,according to the situation at home and abroad,such as dual-carbon strategy and artificial intelligence,the demand and development trend of ultra-high strength steel hot stamping industry are prospected.