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• 发布时间：2021-11-25 08:58
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【概要描述】The main component of the alloy drill bit is tungsten carbide, cobalt, and the like. The alloy drill bit generally refers to a hard alloy drill bit, a score, welded, an invertable blade, and a replaceable head. The main ingredient of the cemented carbide is tungsten carbide, cobalt, etc., the hardness is high, which is generally higher than HRC90 degrees, and is more applicable in bulk processing and difficulty in hard work. The alloy drill bit in the market is generally the overall drill bit of tungsten steel, and the high-quality alloy drill bit will take coating treatment, such as aluminum nitride chromium (AlCrn) coating, the coating is a single layer coating, thickness 4 μm, Micro-hardness is 3200HV, the friction coefficient of 0.35, and the thermal stability is 00 degrees Celsius. After the coating, the drill bit is yellow on gray. After coating, alloy drills can process low alloy steel and high strength steel. High hard steel can reach 54 hrc.