Super Quality Melts for State-of-the-Art Steel

优质熔炼最先进的钢材

• 批准号: 543572-2019
• 负责人: Guthrie, Roderick
• 金额: $ 7.29万
• 依托单位: McGill 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=720735
• 关键词: Super; Quality; Melts; State; Art

Ridding inclusions from liquid steel prior to casting and solidification has vexed steelmakers for many years. Large inclusion agglomerates are sufficiently buoyant, that they can float up to the surface of the liquid steel, if given sufficient time, prior to solidification. However, the smaller inclusion clusters of less than ~60 microns have such low float-out velocities that they remain trapped in the liquid steel, as do other entrained particles, and end-up in the solidified steel. All these inclusions can be very harmful to a steel's properties. We have been working on redressing this problem, by considering how to create microbubble swarms in liquid steel, so as to intercept all sizes of inclusions, and displace them from various "baths" of liquid steel. Using mathematical and full scale water models, we have been able to demonstrate a possible solution to our industrial partners, RTFT, RTMP, and NSC. They enthusiastically agree to support this initiative which will represent a) improved metal powder quality at RTMP, b) improved removal of MPE (metal powder entrainment) at RTFT, and c) improved steel quality at NSC. This CRD program will start, by confirming our water model results to date, using our full scale tundish systems for RTIT and NSC, and a one-third scale model of the RTMP Tundish. Simultaneously, a low temperature, non-wetting, low melting point alloy ("Cerrolow 136"), will be used to confirm the value of this novel "microbubble cleaning" technology, using a recirculating liquid metal loop incorporating controlled gas injection. We will then design equivalent liquid steel tests for Nippon Steel Corporation(NSC), and for the Rio Tinto Metal Powders (RTMP) and Rio Tinto Fer & Titane (RTFT) plants. Given that RTMP is the largest supplier of metal powders to the automobile industry in North America, while RTFT is also a supplier of auto-parts, this will firstly benefit, as well as their secondary metal parts suppliers. This collaboration with NSC will increase the competitiveness of Canada's steelmaking expertise, and lead to the early adoption of the technology, with the promise of dramatic improvements for future steel quality & properties, for the benefit of all.

在铸造和凝固之前从液体钢中脱落的夹杂物多年来使钢铁制造商烦恼。大包含聚集物具有足够的浮力，如果在凝固之前给出足够的时间，它们可以漂浮到液态钢的表面。但是，小于60微米的较小的包含簇具有如此低的浮动速度，以至于它们仍然被困在液态钢中，而其他夹带的颗粒也是如此，而在固化钢中的最终剂量也是如此。所有这些夹杂物可能对钢的特性非常有害。我们一直在考虑如何在液体钢中创建微泡群来纠正这个问题，以拦截所有尺寸的夹杂物，并将它们从各种液态钢的“浴室”中取代。使用数学和完整的水模型，我们能够为我们的工业伙伴，RTFT，RTMP和NSC展示可能的解决方案。他们热情地同意支持该计划，该计划将代表a）RTMP的改善金属粉末质量，b）改善RTFT的MPE（金属粉末夹带）的去除，以及C）在NSC上提高了钢质量。 该CRD程序将通过确认迄今为止的水模型结果开始，使用我们的全尺度系统中的RTIT和NSC系统，以及RTMP的三分之一刻度模型。同时，使用循环液态金属环，配备有控制的气体注入，同时将使用低温，非润湿，低熔点合金（“ Cerrolow 136”）来确认这项新颖的“微泡清洁”技术的价值。然后，我们将为Nippon Steel Corporation（NSC）和Rio Tinto Metal Powders（RTMP）和Rio Tinto Fer＆Titane（RTFT）植物设计等效的液体钢试验。鉴于RTMP是北美汽车行业的最大金属粉末供应商，而RTFT也是汽车零件的供应商，这将首先受益，以及其二级金属零件供应商。与NSC的这种合作将提高加拿大钢制专业知识的竞争力，并导致该技术的尽早采用，并有望对未来的钢铁质量和物业进行巨大改进，以使所有人受益。