Effects of Chemical Composition, Ingot diameter and shape on Solidification and Macrosegregation in Large Size Ingots of High Strength Steels

化学成分、钢锭直径和形状对大尺寸高强度钢钢锭凝固和宏观偏析的影响

• 批准号: 536444-2018
• 负责人: Jahazi, MohammadM
• 金额: $ 6.19万
• 依托单位: École de technologie supérieure
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 财政年份: 2022
• 资助国家: 加拿大
• 起止时间: 2022-01-01 至 2023-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=754313
• 关键词: Effects; Chemical; Composition; Ingot; diameter

Large size forged blocks are used for the manufacturing of critical components such as shafts and dies in transportation and energy industries. The first step in producing such components is ingot casting. However, due to the large size of the ingots, chemically heterogeneous zones (macrosegregation) are produced which often cannot be eliminated during the subsequent heat treatment or forging operations leading to part non conformity and/or rejection. In recent years the demand for larger size ingots (up to 100 tons) has been continuously increasing and therefore it is of critical importance for the ingot casting/forging industry to develop methods and approaches that would allow producing large size ingots with no or little macrosegregation. The problem is even more acute in the North American context, because of the fierce competition from emerging manufacturing countries and new regulations that result in increased costs. To achieve this objective, a more in-depth knowledge of the interactions between material characteristics (composition, microstructure, etc.) and process parameters is required. The development of such knowledge base manufacturing process is the key objective of the present Collaborative Research and Development (CRD) project. In a previous collaboration with the industrial partner, Finkl Steel-Sorel, very interesting results were generated which resulted in significant progresses and savings for the industrial partner. In this project, the work will focus on studying parameters that were not addressed during the first phase, apply the developed findings to new alloys and ingot sizes and develop new methodologies that would allow producing high quality ingots and contribute to strengthening the position of the industrial partner as one of the world leaders in processing of large size ingots.Experimental study using advanced testing equipment will be conducted to develop material models describing the evolution of the microstructure. The developed material models will be implemented into Finite Element (FE) commercial codes to predict local microstructure heterogeneous zones and phase transformation characteristics in large size ingots. The research results will be validated ultimately at the industrial level.

大尺寸锻造块用于制造关键组件，例如运输和能源行业中的轴和模具。生产此类组件的第一步是铸入式铸造。但是，由于铸币的尺寸较大，化学上异质区域（大丝片）会产生，在随后的热处理或锻造操作中通常无法消除，导致部分不符合和/或排斥。近年来，对较大尺寸的铸币的需求（最多100吨）一直在不断增加，因此对于铸锭铸造/锻造行业而言，至关重要的是开发方法和方法，这些方法和方法将允许生产没有或少量宏观环境的大型铸币厂。由于新兴制造国和新法规的激烈竞争导致成本增加，因此问题在北美的情况下更加严重。为了实现这一目标，需要更深入地了解材料特征（组成，微观结构等）和过程参数之间的相互作用。这种知识库制造过程的发展是当前合作研究与发展（CRD）项目的关键目标。在先前与工业合作伙伴Finkl Seel-Sorel的合作中，产生了非常有趣的结果，从而为工业合作伙伴带来了重大进展和节省。在该项目中，这项工作将集中于研究在第一阶段未解决的参数，将开发的发现应用于新的合金和铸币尺寸，并开发新的方法，这些方法将允许生产高质量的Ingot，并有助于加强工业伙伴的位置，以加强世界领导者在大型INGOTS的处理中，使用高级测试设备进行了验证型号，以进行验证型号。开发的材料模型将被实施到有限元（FE）商业代码中，以预测局部微观结构的异质区域和大尺寸ingots中的相变特征。研究结果最终将在工业层面得到验证。