Multi-physics modelling of semi-solid deformation and hot tearing in advanced high strength steels

先进高强度钢半固态变形和热撕裂的多物理场建模

• 批准号: 500496-2016
• 负责人: Phillion, AndréBernard
• 金额: $ 2.92万
• 依托单位: University of British Columbia
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 财政年份: 2016
• 资助国家: 加拿大
• 起止时间: 2016-01-01 至 2017-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=608142
• 关键词: Multi; physics; modelling; semi; solid

Advanced high strength steels (AHSS) represent a key component in reducing vehicle weight and hence reducing fuel consumption related greenhouse gas emissions. In comparison to traditional high strength steels, AHSS achieve significant strength while retaining formability. The increased formability enables greater component complexity, which leads to fewer individual parts and more manufacturing flexibility. However, due to their high alloy contents - manganese up to 5%, silicon up to 2% and aluminum up to 2% - AHSS slabs routinely exhibit transverse surface cracks and centreline cracks caused by hot tearing of the solidifying shell. These cracks result in operational delays and poor product quality for steel producers.

先进高强度钢（AHSS）是降低车辆重量的关键组成部分，从而减少与燃料消耗相关的温室气体排放。与传统的高强度钢相比，AHSS在保持可成形性的同时实现了显著的强度。提高的可成形性使组件更复杂，从而减少单个零件并提高制造灵活性。然而，由于其高合金含量-锰高达5%，硅高达2%，铝高达2% - AHSS板坯通常会出现横向表面裂纹和中心线裂纹，这些裂纹是由凝固壳的热撕裂引起的。这些裂缝导致钢铁生产商的操作延迟和产品质量差。