摘要
为进一步扩大硬质合金材料在木工刀具中的使用范围,文章采用激光熔覆工艺制备硬质合金-45钢复合材料。选用SEM电镜观察激光熔覆试样冶金质量与金相组织特征,与GHO10-82型电刨刀具材料进行显微硬度与耐磨性对比。试验发现,经激光熔覆后硬质合金熔覆层与45钢基体间能实现良好冶金结合,无气孔与裂纹等缺陷存在,熔覆层显微组织包含白亮的细小WC晶粒和树枝状的(W,Ti)C固溶体晶粒。在试样硬化层到基体方向上测试显微硬度,硬度值呈现由高到低良好过渡变化,GHO10-82型刀具材料为分层式阶梯变化。用硬质合金-45钢复合材料制备木工刀具,兼具熔覆层的高硬度、高耐磨性和基体的塑性、韧性,可良好适应木材切削加工要求。
In order to further expand the application range of cemented carbide materials in woodworking blades,the cemented carbide-45 steel composite was prepared by laser cladding process.SEM was used to observe the metallurgical quality and micro⁃structure characteristics of the laser cladding samples,and the microhardness and wear resistance of the samples were compared with those of GHO10-82 electric planer blade materials.It was found that the cemented carbide cladding layer and the 45 steel substrate achieved good metallurgical bonding after laser cladding,and there were no defects such as pores and cracks.The microstructure of the cladding layer included white and bright fine WC grains and dendritic(W,Ti)C solid solution grains.The microhardness is mea⁃sured in the direction from the hardened layer of the sample to the matrix,and the hardness value shows a good transition from high to low.The GHO10-82 blade material shows a hierarchical step change.The preparation of woodworking tools using hard alloy 45 steel composite materials combines the high hardness and wear resistance of the cladding layer with the plasticity and toughness of the ma⁃trix,which can well meet the requirements of wood cutting processing.
出处
《木工机床》
2023年第1期19-22,共4页
Woodworking Machinery
关键词
复合材料
激光熔覆
硬质合金
冶金结合
耐磨性
composite materials
laser cladding
hard alloy
metallurgical bonding
abrasion resistance
