Hot-rolled high-strength steels with leaner alloying concepts

采用精简合金概念的热轧高强度钢

• 批准号: 538214-2018
• 负责人: Militzer, Matthias
• 金额: $ 5.83万
• 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: 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=720471
• 关键词: Hot; rolled; strength; steels; leaner

Steel remains the dominant engineering material with a world production of more than a billion tones annually to be used in a wide range of applications, e.g. ¾ of all manufactured goods contain steel. Thus, the development of new steel products continues to play an important role in economy and society. Further, new processing routes are being developed to reduce energy consumption and green house gas emissions from steel making. An important technological development in this regard was the introduction of the direct strip production complex (DSPC) for hot rolled steels which is employed by Algoma Steel, the sponsor of this project. A number of technological advances have been made to enable the production of most high strength steel grades in the DSPC. Further modernization of steel design and steel production facilities are critical for steel companies like Algoma to remain competitive. In particular, accelerated cooling has become a key technology to produce thermo-mechanically controlled processed (TMCP) steels with reduced alloying content but the improved mechanical properties required for demanding applications. Using well-designed processing paths rather than alloying additions is an attractive approach to manufacture advanced high-performance steels. The austenite-ferrite transformation takes place during cooling on the runout table and the design of appropriate cooling strategies is critical to obtain fine-grained and/or multi-phase transformation products required in state-of-the-art TMCP steels. Further, coiling of the hot band must be conducted to maximize the precipitation strengthening potential of microalloying elements, e.g. Nb, Ti. Through process modelling for the DSPC is a critical tool for Algoma to optimize the design of robust processing strategies for leaner steel chemistries. This project seeks to develop a DSCP process model for selected steel chemistries using the microstructure engineering approach, i.e. to link the operational process parameters of the DSPC to the hot strip properties by accurately modelling the microstructure evolution. The new model will be validated with industrial data. The project offers training opportunities for four graduate students.

钢仍然是占主导地位的工程材料，每年世界产量超过10亿吨，用于广泛的应用，例如，所有制成品中的3/4含有钢。因此，钢铁新产品的开发继续在经济和社会中发挥重要作用。此外，本集团正在开发新的加工路线，以减少炼钢过程中的能源消耗及绿色气体排放。这方面的一项重要技术发展是引进了热轧钢直接带材生产联合体（DSPC），该联合体由该项目的赞助者阿尔戈马钢铁公司采用。已经取得了许多技术进步，使DSPC中大多数高强度钢的生产成为可能。钢铁设计和钢铁生产设施的进一步现代化对于像阿尔戈马这样的钢铁公司保持竞争力至关重要。特别是，加速冷却已成为生产热机械控制加工（TMCP）钢的关键技术，该钢具有降低的合金含量，但具有满足苛刻应用所需的改善的机械性能。使用精心设计的加工路径而不是合金添加剂是制造先进高性能钢的一种有吸引力的方法。铁素体-铁素体转变发生在输出台上的冷却过程中，并且适当的冷却策略的设计对于获得最先进的TMCP钢中所需的细晶粒和/或多相转变产物至关重要。此外，必须进行热轧带的卷取以使微合金化元素（例如Nb、Ti）的沉淀强化潜力最大化。DSPC的全过程建模是阿尔戈马优化精益钢化学的稳健加工策略设计的关键工具。该项目旨在使用微观结构工程方法为选定的钢化学成分开发DSCP工艺模型，即通过精确模拟微观结构演变将DSPC的操作工艺参数与热轧带钢性能联系起来。新模型将通过工业数据进行验证。 该项目为四名研究生提供了培训机会。