机电工程技术2025，Vol.54Issue(18)：42-46,5.DOI:10.3969/j.issn.1009-9492.2025.18.008
掺杂TiC对双晶WC硬质合金组织和性能的影响
Effect of TiC Doping on the Microstructure and Properties of Double Phase WC Cemented Carbides
摘要
Abstract
The hard alloy with dual WC crystal structures is prepared using tungsten carbide(WC)powders with particle sizes of 0.2 μm and 12 μm as the main components,cobalt(Co)as the binder,and by doping a certain amount of titanium carbide(TiC)via the powder metallurgy method.The preparation process includes key steps such as ball milling,sieving,pre-sintering,and high-temperature sintering,with each step strictly controlled to ensure the uniformity and structural stability of the alloy.To explore the effect of TiC addition on the microstructure and properties of dual-crystal WC hard alloys,scanning electron microscopy(SEM)is used to observe the microstructure and surface morphology of the alloy.The density of the alloy was measured using Archimedes'drainage method,and the hardness was determined using a Vickers hardness tester,with fracture toughness calculated based on the hardness test indentations.The results indicate that the addition of TiC can effectively enhance the hardness and fracture toughness of the dual-crystal structured hard alloy.When the TiC content is 1.5%,the dual-crystal structured hard alloy exhibits superior performance,with a hardness of 1 922.80 kgf/mm² and a fracture toughness of 8.17 MPa·m1/2.The addition of TiC during the sintering process of dual-crystal structured hard alloys alleviates the phenomenon of abnormal grain growth,promotes the uniform refinement of grains,thereby enhancing the density of the alloy and improving its mechanical properties.Microstructural analysis further confirms that the alloy with 1.5%TiC addition has a more uniform and dense internal structure,with finer grains and significantly reduced internal defects.关键词
硬质合金/双晶结构/TiC/综合性能Key words
hard alloy/dual crystal structure/TiC/comprehensive performance分类
矿业与冶金引用本文复制引用
夏小群,梁晓彤,杨文乐,杨卓莹,周冠南..掺杂TiC对双晶WC硬质合金组织和性能的影响[J].机电工程技术,2025,54(18):42-46,5.基金项目
岭南师范学院大学生创新训练计划项目(X202410579054) （X202410579054）
2022年度湛江市非资助科技攻关计划项目(2022B01139) （2022B01139）
2022年校级科研项目(LY2209) （LY2209）
2023年岭南师范学院学生课外科研立项项目 （）
