Drill bits material

Carbide drill bits for metal are generally used as epoxy glass cloth complex copper plate tool wear particularly fast. The so-called hard close
Gold is tungsten carbide powder as matrix, cobalt powder as a binder pressurized, sintering. Usually contain 94% tungsten carbide, 6% cobalt. Due to its high hardness, very wearable, there is a certain strength, suitable for high-speed cutting. But poor toughness, very brittle, cemented carbide in order to improve the performance of some use in the carbonized matrix chemical vapor deposition of a 5 to 7 microns special hard titanium carbide (TIC) or titanium nitride (TIN), it having a higher hardness. Some of ion implantation technology, titanium, nitrogen, and carbon into a certain depth of its base, not only to improve the hardness and strength but also in the core drill bits resharpening inject these ingredients can move into. There are physical methods used to generate a layer of diamond film on top of the drill bits, which greatly improves the hardness and wear resistance of the drill bits. The hardness and strength of cemented carbide, and tungsten carbide and cobalt only ratio, but also with the relevant particles. Carbide drill bits ultrafine particles having an average grain size of the tungsten carbide phase in less than 1 micron. This core drills bit is not only high hardness and compressive and flexural strength have increased. In order to save costs many drill bits shank welded structure, originally as a whole are carbide drill bits, drill bits the rear handle with a stainless steel, costs declined significantly due to the use of different materials, but its dynamic concentricity less than solid carbide drill bits.