Effective of Surface Active Elements on the Selective Oxidation of Fe-Mn and Fe-Si Alloys

表面活性元素对Fe-Mn和Fe-Si合金选择氧化的影响

• 批准号: RGPIN-2019-06535
• 负责人: McDermid, Joseph
• 金额: $ 4.01万
• 依托单位: McMaster University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2022
• 资助国家: 加拿大
• 起止时间: 2022-01-01 至 2023-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=758261
• 关键词: Effective; Surface; Active; Elements; Selective

The legislative requirements for increased vehicle fuel efficiency in order to decrease transportation sector greenhouse gas emissions is driving automotive manufactures to reduce vehicle weight while maintaining vehicle safety and durability. To achieve this goal, manufacturers are employing increasing amounts of advanced high strength steels in their designs such that material specific strength can be increased and material cross-sections reduced. However, the use of reduced cross-sections increases the need for corrosion protection of the steels in order to maintain vehicle integrity, safety and meet consumer durability expectations. Zinc (Zn)-based metallic coatings applied by the continuous galvanizing (CGL) process is the most cost effective means of achieving this goal. However, the newest grades of advanced steels have higher alloy contents, which make the process of reactive wetting and strong coating adherence difficult due to alloy element - mainly manganese (Mn) and silicon (Si) - selective oxidation in the CGL process. There are several means of overcoming this difficulty, with the use of internal oxidation - in which harmful oxides are formed inside the substrate, leaving a good surface - and the use of surface active elements, such as small additions of tin (Sn), or combinations of the two, being currently under investigation by the McDermid research group for the next generation of highly alloyed advanced steels. The present proposal seeks to address the fundamental question of the effect of the primary alloying elements in the next generation of advanced steels - Mn and Si - on the efficacy of surface active alloying additions, in particular Sn, in altering the external oxides morphology such that the substrates are compatible with the CGL process. The findings of this investigation will be leveraged with McDermid's other activities on the design of the next generation of advanced steels such that they are both compatible with the continuous galvanizing process and meet the increasingly demanding property targets of the automotive materials sector. This project will train two PhD level researchers who will have advanced knowledge of surface and property oriented steel designs, and which will help enable Canadian manufacturers to produce lighter, safer, sustainable, fuel efficient vehicles and which will help promote the knowledge-based and sustainable manufacturing sector of the future.

为了减少运输部门温室气体排放而提高车辆燃油效率的立法要求正在推动汽车制造商减轻车辆重量，同时保持车辆安全性和耐用性。为了实现这一目标，制造商在其设计中采用越来越多的先进高强度钢，以提高材料的比强度并减少材料的横截面。然而，使用减小的横截面增加了对钢材腐蚀防护的需求，以保持车辆的完整性、安全性并满足消费者对耐用性的期望。通过连续镀锌 (CGL) 工艺涂覆的锌 (Zn) 基金属涂层是实现这一目标的最具成本效益的方法。然而，最新牌号的先进钢具有较高的合金含量，由于合金元素（主要是锰（Mn）和硅（Si））在CGL工艺中发生选择性氧化，使得反应润湿和强涂层附着力的过程变得困难。有多种方法可以克服这一困难，包括使用内氧化（在基材内部形成有害氧化物，从而留下良好的表面）以及使用表面活性元素，例如少量添加锡 (Sn) 或麦克德米德研究小组目前正在研究两者的组合，以开发下一代高合金先进钢。本提案旨在解决下一代先进钢中的主要合金元素（Mn和Si）对表面活性合金添加剂（特别是Sn）在改变外部氧化物形态方面的功效的影响的基本问题，从而该基材与 CGL 工艺兼容。这项调查的结果将与麦克德美德在下一代先进钢材设计方面的其他活动相结合，使它们既能与连续镀锌工艺兼容，又能满足汽车材料行业日益苛刻的性能目标。该项目将培训两名博士级研究人员，他们将掌握表面和性能导向钢设计的先进知识，这将有助于加拿大制造商生产更轻、更安全、可持续、节能的车辆，并将有助于促进基于知识和可持续发展未来的制造业。