ASSURE 2 - Advanced Steel Shaping Using Reduced Energy

ASSURE 2 - 使用减少的能源进行先进的钢材成型

• 批准号: EP/P01206X/1
• 负责人: Claire Davis
• 金额: $ 95.87万
• 依托单位: University of Warwick
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2017
• 资助国家: 英国
• 起止时间: 2017 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FP01206X%2F1
• 关键词: ASSURE; Advanced; Steel; Shaping; Using

Steel continues to be the most used material in the world by value and play an essential role in all aspects of society, from construction to transport, energy generation to food production. The UK steel industry is undergoing significant changes with changes in ownership. The long-term sustainability of UK steel making requires lower energy production and the development of high value steel products. Energy constitutes a significant portion of the cost of steel production, between 20% to 40% and, whilst the amount of energy required to produce a tonne of steel has reduced by 50% in the past 30 years through changes in steel making technologies, further improvements are necessary. Heating and reheating steel is responsible for significant energy consumption in the steel supply chain. Therefore the introduction of new processing routes to minimise or eliminate reheating stages will have a dramatic effect on energy use, and, if this is coupled with reduced hot deformation by casting to near net shape, further energy reductions can be realised.This project is concerned with establishing the process and chemistry windows for production of conventional and advanced high strength strip (AHSS) steel grades using belt casting technology. Belt casting is a near net shape casting process, producing strip that needs minimal hot deformation to achieve the required product thickness. It is a significantly lower energy production route compared to traditional continuous casting to large sections with subsequent hot rolling, for example energy consumption could be reduced by > 3 GJ/tonne steel produced (based on savings of approx. 2 GJ/tonne from reduced hot rolling and approx. 1.25 GJ/tonne from near net shape casting). In addition belt casting allows the production of AHSS steel grades that cannot currently be manufactured using conventional processing: TWIP (twinning induced plasticity) and TRIP (transformation induced plasticity) grades have high work hardening rates meaning they cannot be rolled in current hot rolling strip mills; and low density (high Al) steels have very large grain sizes (millimeters) that result in poor processability (e.g. hot tearing during continuous casting). These steels are extremely attractive commercially, given their vastly superior properties (TWIP and TRIP steels are 2x as strong, with 3x the ductility of conventional steels, and high Al steels have a combination of good strength and lower density), which can contribute to light weighting in the automotive and construction industries.During the ASSURE feasibility project facilities were established at WMG to allow simulation belt cast microstructures, including dynamic direct observation of the solidifying steel at different cooling rates. It was shown that the microstructures are altered by the higher cooling rate of belt casting, compared to conventional slab casting, and that further beneficial modifications (e.g. reduction in grain size in high Al steels) can be achieved by composition control. In this project (ASSURE2), quantitative relationships between composition, process parameters and microstructure (and hence final product properties) will be established, taking into account the higher cooling rates of belt casting and the reduced hot deformation after casting to final thickness compared to conventional processing. Novel new concepts, such as atmospheric control for composition modification and / or solidification temperature reduction and electromagnetic fields for microstructure refinement will also be considered. The collaboration with Professor Guthrie at McGill University in Canada, the leading expert on belt casting technology and computational modelling of liquid metal processes, will provide significant added value to the scientific studies, with the subcontract to use their pilot plant facilities, at MetSim, allowing us to consider the scale up from laboratory scientific studies to industrially relevant processing.

按价值计算，钢铁仍然是世界上使用最多的材料，并在社会的各个方面发挥着重要作用，从建筑到运输，从能源生产到粮食生产。随着所有权的变化，英国钢铁行业正在经历重大变化。英国钢铁生产的长期可持续性需要降低能源产量和开发高价值钢铁产品。能源占钢铁生产成本的很大一部分，占 20% 至 40%，尽管通过炼钢技术的变革，过去 30 年生产一吨钢铁所需的能源量减少了 50%，但仍需要进一步改进。加热和再加热钢铁是钢铁供应链中大量能源消耗的原因。因此，引入新的加工路线以最大程度地减少或消除再加热阶段将对能源使用产生巨大影响，如果再加上通过浇铸至接近最终形状来减少热变形，则可以进一步降低能源消耗。该项目涉及建立使用带式连铸技术生产传统和先进高强度带钢 (AHSS) 钢种的工艺和化学窗口。带式铸造是一种近终形铸造工艺，生产的带材需要最小的热变形即可达到所需的产品厚度。与传统的连铸到大型型钢并随后进行热轧相比，这是一条能耗显着降低的路线，例如，每吨生产的钢材可减少超过 3 GJ 的能源消耗（基于减少热轧可节省约 2 GJ/吨，近净形铸造可节省约 1.25 GJ/吨）。此外，带式连铸可以生产目前无法使用传统加工制造的AHSS钢种：TWIP（孪生诱导塑性）和TRIP（相变诱导塑性）钢种具有高加工硬化率，这意味着它们无法在当前的热轧带钢轧机中轧制；低密度（高铝）钢的晶粒尺寸（毫米）很大，导致加工性能较差（例如连铸过程中的热撕裂）。这些钢材在商业上极具吸引力，因为它们具有极其优越的性能（TWIP 和 TRIP 钢的强度是传统钢的 2 倍，延展性是传统钢的 3 倍，高铝钢兼具良好的强度和较低的密度），有助于汽车和建筑行业的轻量化。在 ASSURE 可行性项目期间，WMG 建立了设施，以允许模拟带铸微观结构，包括动态直接观察 以不同的冷却速率凝固钢。结果表明，与传统板坯连铸相比，带式连铸的较高冷却速率可以改变微观结构，并且可以通过成分控制实现进一步有益的改变（例如减小高铝钢的晶粒尺寸）。在该项目（ASSURE2）中，将建立成分、工艺参数和微观结构（以及最终产品性能）之间的定量关系，同时考虑到与传统加工相比，带式铸造的冷却速率较高，并且铸造至最终厚度后热变形减少。新颖的新概念，例如用于成分改变和/或凝固温度降低的大气控制以及用于微观结构细化的电磁场也将被考虑。与加拿大麦吉尔大学的 Guthrie 教授（带式铸造技术和液态金属工艺计算建模方面的领先专家）的合作将为科学研究提供显着的附加值，并通过分包合同使用他们在 MetSim 的试验工厂设施，使我们能够考虑从实验室科学研究扩大到工业相关加工。

项目成果

Retaining {100} fibre texture in electrical steel via strain-induced boundary migration recrystallisation.

• DOI: 10.1088/1742-6596/1270/1/012009
• 发表时间: 2019-08
• 期刊: Journal of Physics: Conference Series
• 作者: M. Ji;C. Davis;C. Slater

Characterising microstructures in metallic materials

表征金属材料的微观结构

• 发表时间: 2017
• 期刊: Materials World
• 作者: Hollyhoke N

Control of as-cast microstructure morphology of high silicon electrical steels produced through a horizontal belt casting process simulator

• DOI: 10.1080/03019233.2020.1758995
• 发表时间: 2020-05
• 期刊: Ironmaking & Steelmaking
• 影响因子: 2.1
• 作者: C. Slater;M. Ji;Bharath Bandi;C. Davis

Thermomechanical Processing Map in Retaining {100}//ND texture via Strain-Induced Boundary Migration Recrystallization Mechanism

• DOI: 10.1007/s11661-020-06047-x
• 发表时间: 2020-10
• 期刊: Metallurgical and Materials Transactions A
• 作者: M. Ji;C. Slater;C. Davis

Implications of Accelerated Solidification Rates Seen in Belt Casting on Precipitation in Nb Bearing Steels

带式连铸中的加速凝固速率对含铌钢中析出的影响

• DOI: 10.1002/srin.201700358
• 发表时间: 2017
• 期刊: steel research international
• 影响因子: 2.2
• 作者: Slater C