钴粉包覆的铸造WC颗粒在金刚石锯片中的应用

Application of cast tungsten carbide particles coated with cobalt powder in diamond saw blades

对铸造WC、Co粉包覆铸造WC和Ni粉包覆铸造WC颗粒3种材料在金刚石锯片中的应用进行研究,探究其对金刚石锯片胎体机械性能、微观形貌及锯片切割性能的影响。结果表明:当3种材料与金属粉末的质量比都为3∶1时,形成的3种胎体的硬度相当。含Co粉包覆铸造WC的胎体抗弯强度最高,WC颗粒与胎体界面的结合最紧密,胎体显微组织最致密;含Ni粉包覆铸造WC的胎体的抗弯强度次之;仅加入铸造WC的胎体的抗弯强度最差。与仅加入铸造WC的锯片相比,Co粉包覆铸造WC应用到锯片中,其锯片的切割寿命最长,提高了40%。

The application of the cast WC,the Co powder coated cast WC and the Ni powder coated cast WC particles in diamond saw blades were studied,and their effects on the mechanical properties,the micro morphologies and the cutting properties of the diamond saw blade matrix were explored.The results show that when the mass ratio of the three kinds of WC material to the metal powder is 3∶1,the hardness of the three kinds of matrix is equivalent.The bending strength of the matrix containing Co powder coated cast WC is the highest,the interface between the WC particles and the matrix is the closest,and the microstructure of the matrix is the densest.The bending strength of the matrix containing Ni powder coated cast WC is the second.The matrix with only cast WC has the worst bending strength.Compared with the saw blade with only cast WC added,the cutting life of the saw blade with Co powder coated cast WC is the longest and increases by 40%.