Physical metallurgy for toughness of 1% Cr abrasion resistant steel for grinding ball stock

煤、焦炭、水泥和铁矿等矿物的加工过程包括将大块岩石压碎，以便将其缩小到细粒度，以便提取所需的矿物。在粉碎和研磨矿物时，研磨介质（球和棒）起着至关重要的作用。本CRD项目的科学目标是开发抗冲击耐磨钢的物理冶金技术。本项目的技术目标是：1)通过研究合金元素对冲击磨料的影响，设计新型冲击磨料钢；2)通过研究偏析和脆性相来提高钢的韧性；3)通过研究相变和热应变来最小化球料中的残余应力。该研究和培训项目将采用系统的冶金方法来解决磨球料中剥落脆化的关键工业问题。基于当前Engage项目的成功成果，这项拟议的研究将整合到PI的能源材料发现研究计划的更广泛范围内。该项目的结果将通过建立化学成分、工艺窗口和提供目前无法获得的与其业务相关的“专有技术”，直接使工业合作伙伴受益。加拿大的采矿业和制造业将受益于先进研磨材料更好的经济性和性能，以减轻磨损。材料工程领域将通过这项工作的新发现、直接观察、解释和模型得到加强。在这项研究的过程中，两名博士生和四名本科生将接受使用最新一代科学工具和研究方法的培训。理论和实验结果的实际应用将在AltaSteel，埃德蒙顿，阿尔伯塔工厂和加拿大Moly-Cop，不列颠哥伦比亚省工厂实施。

The processing of mineral ores such as coal, coke, cement, and ironstone, involves crushing big rocks in order to reduce them to fine sizes for the extraction of any desired minerals. In crushing and grinding minerals, grinding media (balls and rods) play a critical role. The scientific objective of this CRD project is to develop the physical metallurgy for impact-abrasion resistant steels. The technical objectives of the project are:1) To design new impact-abrasive steels by investigating the effect of alloying elements; 2) To enhance the steel toughness by investigating the segregation and brittle phases; and 3) To minimize residual stresses in the ball stock by investigating phase changes and thermal strains. This proposed research and training project will apply a systematic metallurgical approach to the critical industrial issue of spalling embrittlement in grinding ball stock. Based upon the successful outcome of a current Engage project, this proposed study integrates within the broader scope of the PI's Discovery research program on energy materials. The outcome of this project will directly benefit the industrial partners through the establishment of chemical composition, process windows, and providing the currently unavailable "know how" related to its business. Canadian mining and manufacturing industries will benefit from better economics and capabilities of advanced grinding material for wear mitigation. The field of materials engineering will be strengthened by the new findings, direct observations, interpretations, and models to come from this work. Over the course of this research, two PhD students and four undergraduates will be trained in the use of latest generation scientific tools and research methodologies. The practical application of the theoretical and experimental findings will be implemented at AltaSteel, Edmonton, Alberta facility and Moly-Cop Canada, British Columbia facility.