Effect of Chemical Composition and Microstructure on Liquid Metal Embrittlement in Advanced High Strength Steels.

化学成分和微观结构对先进高强度钢液态金属脆性的影响。

• 批准号: 543708-2019
• 负责人: Zurob, Hatem
• 金额: $ 1.97万
• 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: 2021
• 资助国家: 加拿大
• 起止时间: 2021-01-01 至 2022-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=720780
• 关键词: Effect; Chemical; Composition; Microstructure; Liquid

The steelmaking and automotive industries are key players in the drive to reduce greenhouse emissions and protect the environment. The development of advanced high strength steels is one of the most promising approaches for reducing vehicle weight and improving fuel efficiency. As steel producers strive to produce these new grades of steels, they are faced with a number of new challenges. Exposed automotive components are typically galvanized (Zn-coated) in order to protect them from corrosion. When Zn-coated, high-strength steels are spot welded on the assembly line, the heat generated during spot welding results in the formation of liquid Zn. The liquid penetrates along grain-boundaries within the steel and this ultimately results in formation of surface cracks.The goal of this project is to provide a tool/model that could be used by the industry partner (ArcelorMittal Dofasco) to predict the susceptibility of new steel grades to cracking during Resistive Spot Welding (RSW). In this way, the computability of the steel with the RSW process can be taken into account during the initial design stages, thus avoiding the need for costly modifications of the steel chemistry/microstructure during the final testing stages of the product. The grant will train one graduate student and a Research Associate in an area of great importance to the Canadian economy. The HQP will spend a significant portion of their time at the industrial partner's facilities in Hamilton, ON and East Chicago, IN in order to become familiar with both the industrial and academic aspects of the project.

钢铁和汽车行业是减少温室气体排放和保护环境的关键参与者。开发先进的高强度钢是减轻车辆重量和提高燃料效率的最有前途的方法之一。 随着钢铁生产商努力生产这些新等级的钢材，他们面临着许多新的挑战。 暴露的汽车部件通常镀锌（镀锌），以保护它们免受腐蚀。 当镀锌高强度钢在装配线上点焊时，点焊过程中产生的热量导致液态锌的形成。 该项目的目标是提供一种工具/模型，可供行业合作伙伴（ArcelorMittal Dofasco）用于预测新钢种在电阻点焊（RSW）过程中对裂纹的敏感性。通过这种方式，在初始设计阶段可以考虑RSW工艺的钢的可计算性，从而避免在产品的最终测试阶段需要对钢化学/微观结构进行昂贵的修改。该补助金将在对加拿大经济非常重要的领域培训一名研究生和一名研究助理。HQP将在工业合作伙伴位于安大略省汉密尔顿和印第安纳州东芝加哥的工厂花费大量时间，以便熟悉该项目的工业和学术方面。