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: $ 3.24万
• 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: 2020
• 资助国家: 加拿大
• 起止时间: 2020-01-01 至 2021-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=699673
• 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.

炼钢和汽车行业是减少温室排放和保护环境的主要参与者。高级高强度钢的发展是减少车辆重量并提高燃油效率的最有希望的方法之一。 当钢铁生产商努力生产这些新等级的钢时，他们面临着许多新的挑战。 裸露的汽车组件通常被镀锌（Zn包被），以保护它们免受腐蚀。 当Zn涂层时，将高强度的钢置在装配线上时，在点焊接过程中产生的热量会导致液体Zn的形成。 液体沿着钢内的晶型穿透，最终导致表面裂纹的形成。 该项目的目的是提供一种工具/模型，该工具/模型可以由行业合作伙伴（Arcelormittal dofasco）使用，以预测新钢等级在电阻点焊接过程中破裂的敏感性（RSW）。这样，可以在初始设计阶段考虑使用RSW工艺的钢的可计算性，从而避免在产品的最终测试阶段对钢化学/微结构进行昂贵的修改。该赠款将培训一名研究生和一名研究助理，对加拿大经济非常重要。 HQP将在汉密尔顿，芝加哥和东芝加哥的工业合作伙伴的设施中度过很大一部分时间，以熟悉该项目的工业和学术方面。