Advanced zn-coated steel development and manufacturing technology for automotive weight reduction and safety enhancement

用于汽车减重和安全增强的先进镀锌钢开发和制造技术

• 批准号: 522309-2017
• 负责人: McDermid, Joseph
• 金额: $ 24.99万
• 依托单位: McMaster University
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 财政年份: 2018
• 资助国家: 加拿大
• 起止时间: 2018-01-01 至 2019-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=659210
• 关键词: Advanced; zn; coated; steel; development

One of the most effective means of increasing automotive fuel efficiency and, thereby, decreasing harmful emissions is vehicle weight reduction. This can be accomplished by increasing the use of advanced high strength steels (AHSS) for structural components and body closures. Vehicle safety is of paramount importance, for which ultra-high strength (UHSS) press-hardening steels (PHS) are comprising increased proportions of safety-related components. The use of UHSS and AHSS in these critical applications permits the use of thinner sheet steel cross-sections while enhancing passenger safety. However, reducing sheet metal thickness demands enhanced corrosion protection to maintain the structural integrity and meet consumer durability expectations, for which Zn-based coatings applied by the continuous galvanizing (CGL) process is a cost-effective means of achieving this objective. This project will focus on developing the next generation of AHSS - third generation (3G) AHSS - which are more highly alloyed than the present generation of AHSS, but have significantly higher strengths without sacrificing formability. However, the higher alloy contents of 3G AHSS require that they be specifically designed to be compatible with the CGL process to ensure that the desired properties be achieved while allowing for the formation of corrosion protective Zn-based coatings; this is one of the objectives of the CRD. Also, the current generation of PHS are not compatible with Zn-based coatings for corrosion protection and the development of the next generation of Zn-coated PHS is also one of the primary objectives of the CRD. Last, but not least, the processing techniques used to overcome the difficulties of processing AHSS in the CGL can cause problems with the critical spot welding fabrication process. For this reason, the last objective of this CRD is to systematically determine the effect of AHSS processing alternatives on the spot welding process. This project will train ten students for the Canadian automotive and steel industries and will provide the both industries with a set of tools which can be used to increase their competitive advantage in the highly demanding automotive sector.********

提高汽车燃油效率并从而减少有害排放的最有效方法之一是减轻车辆重量。这可以通过增加结构部件和车身封闭件中先进高强度钢 (AHSS) 的使用来实现。车辆安全至关重要，为此，超高强度 (UHSS) 热压硬化钢 (PHS) 中安全相关部件的比例不断增加。在这些关键应用中使用 UHSS 和 AHSS 允许使用更薄的钢板横截面，同时提高乘客安全。然而，减少金属板材厚度需要增强腐蚀防护，以保持结构完整性并满足消费者的耐用性期望，为此，通过连续镀锌（CGL）工艺涂覆的锌基涂层是实现这一目标的一种经济有效的方法。该项目将重点开发下一代 AHSS - 第三代 (3G) AHSS - 其合金含量比当前一代 AHSS 更高，但在不牺牲成形性的情况下具有显着更高的强度。然而，3G AHSS 的合金含量较高，要求对其进行专门设计，以与 CGL 工艺兼容，以确保实现所需的性能，同时允许形成防腐蚀锌基涂层；这是 CRD 的目标之一。此外，当前一代的 PHS 与用于腐蚀防护的锌基涂层不兼容，开发下一代锌涂层 PHS 也是 CRD 的主要目标之一。最后但并非最不重要的一点是，用于克服 CGL 中 AHSS 加工困难的加工技术可能会导致关键点焊制造工艺出现问题。因此，该 CRD 的最后一个目标是系统地确定 AHSS 加工替代方案对点焊工艺的影响。该项目将为加拿大汽车和钢铁行业培训十名学生，并将为这两个行业提供一套工具，可用于提高它们在要求极高的汽车行业中的竞争优势。********