铸造碳化钨粉末物性对激光熔覆陶瓷颗粒增强Fe基复合材料耐磨性能的影响

发布时间：2018-05-23 16:41

本文选题：铸造碳化钨粉末 + 激光熔覆　；参考：《稀有金属材料与工程》2017年04期

【摘要】：为研究铸造碳化钨粉末物性对激光熔覆陶瓷颗粒增强Fe基复合材料耐磨性能的影响,将不同制备方法和粒径的铸造碳化钨粉末添加到Fe基合金粉中,在45号钢表面进行激光熔覆以获得高硬度和高耐磨的合金化层。利用金相显微镜、扫描电子显微镜(SEM)、X射线衍射仪(XRD)、硬度计分别分析了合金化层的显微组织、物相组成以及显微硬度。利用轮式磨损试验机测试了其常温下的耐磨性能,并进行了比较。结果表明:熔覆层主要由莱氏体组成,碳化钨粉末的制备方法和粒径差异对复合材料的耐磨性能具有重要影响。等离子旋转电极雾化法制备的碳化钨粉末能起到最好的增强耐磨作用,粒径细的碳化钨粉末比粒径粗的粉末增强耐磨效果要好。
[Abstract]:In order to study the effect of the physical properties of cast tungsten carbide powder on the wear resistance of laser cladding ceramic particle reinforced Fe matrix composite, different preparation methods and particle size of cast tungsten carbide powder were added to Fe base alloy powder. High hardness and high wear resistance alloying layer were obtained by laser cladding on 45 steel surface. The microstructure, phase composition and microhardness of the alloyed layer were analyzed by means of metallographic microscope, scanning electron microscope (SEM) and X-ray diffractometer (XRDX). The wear resistance of the wheel wear tester was tested and compared at room temperature. The results showed that the cladding layer was mainly composed of Leydahl, and the preparation method and particle size difference of tungsten carbide powder had an important effect on the wear resistance of the composite. The tungsten carbide powder prepared by the plasma rotating electrode atomization method has the best effect on wear resistance, and the fine tungsten carbide powder is better than the coarse particle size powder.
【作者单位】：广东省科学院广东省材料与加工研究所;
【基金】：国家国际科技合作专项(2011DFR50740) 广东省战略性新兴产业核心技术攻关专项(2011A091102007) 广州市科技计划专项(2012J5100050) 广东省科学院科研平台环境与能力建设专项资金专项(2016GDASPT-0209) 广州市科创委创新平台建设与共享专项(201509010003)
【分类号】：TG174.4

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