Shandong drill bit manufacturers about the material

Shandong drill bit manufacturers about the material

Printed circuit board drill hole are generally made of hard alloy, because the epoxy glass cloth complex copper plate on tool wear quickly. The so-called hard alloy

Gold is a tungsten carbide as matrix, with cobalt powder binder by pressing, sintering. Usually containing tungsten carbide cobalt containing94%,6%. Because of its high hardness, good wear resistance, has a certain strength, suitable for high speed cutting. But poor toughness, very brittle, in order to improve the performance of hard alloy, some use in carbonization matrix by chemical vapor deposition of a layer of5~ 7 micron extra hard titanium carbidetitanium nitride ( TIC ) ( TIN ), which has higher hardness. Some use the technique of ion implantation, titanium, nitrogen, and carbon into the matrix to a given depth, not only improve the hardness and strength but also in drill grind these injected component can move. And the use of physical methods in bit top to form a layer of diamond film, greatly improve the hardnesswear resistance of the drill bit. Carbide hardnessstrength, not only and tungsten carbide and cobalt ratio, and particle related. Ultrafine particles of tungsten carbide hard alloy bit, which is the average crystal size of less than 1 micrometers. This drill, not only high hardness and compressivebending strength are improved. In order to save the cost of many drill welding handle structure, the original bit as a whole are hard alloy, now rear shank made of stainless steel, the cost is decreased due to the adoption of different materials the dynamic concentricity of less solid carbide drill bits, especially in small diameter.