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

煤炭、焦炭、水泥和铁矿石等矿物的加工包括粉碎大块岩石，以便将它们细化到细小的尺寸，以便提取任何所需的矿物。在粉碎和研磨矿物时，研磨介质(球和棒)起着关键作用。该CRD项目的科学目标是发展耐冲击磨损钢的物理冶金。该项目的技术目标是： 1)通过研究合金化元素的作用，设计出新型冲击磨料钢； 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，最大限度地降低球坯中的残余应力。 这一拟议的研究和培训项目将应用系统的冶金方法来解决磨球毛坯剥落脆化这一关键工业问题。基于当前一个Engage项目的成功结果，这项拟议的研究纳入了PI关于能源材料的发现研究计划的更广泛范围。该项目的成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“技术诀窍”，直接使工业合作伙伴受益。加拿大矿业和制造业将受益于更好的经济性和先进研磨材料缓解磨损的能力。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艾伯塔省埃德蒙顿的AltaSteel工厂和不列颠哥伦比亚省的Moly-Cop Canada工厂进行。

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.