Preparation method of hard alloy drill tooth with high-entropy alloy coating

Abstract

The invention discloses a preparation method of a hard alloy drill tooth with a high-entropy alloy coating. The preparation method comprises the following steps: processing a hard alloy matrix into the hard alloy drill tooth; the method comprises the following steps: polishing a to-be-cladded surface of a hard alloy drill tooth, and ultrasonically cleaning with alcohol for later use; the preparation method comprises the following steps: putting chromium, cobalt, nickel, iron, niobium, silicon and carbon into a ball milling tank in the form of powdery elementary substances or alloy powder, and carrying out ball milling at room temperature to obtain high-entropy alloy coating powder; the high-entropy alloy coating powder is bonded to the to-be-cladded face of the hard alloy drill tooth through an adhesive, the hard alloy drill tooth bonded with the high-entropy alloy coating powder is put into a drying box to be dried, and after drying is finished, the to-be-cladded hard alloy drill tooth is obtained; and under the argon protective atmosphere, the hard alloy drill tooth to be cladded is placed on a machining table to be subjected to laser cladding, and the hard alloy drill tooth with the cladding coating is obtained. The problem that the service life of the rolling rock breaking drill bit is short due to the failure of the drill teeth when the rolling rock breaking drill bit is used for rolling rock breaking in hard rock and extremely hard rock stratums can be solved.

Description

technical field [0001] The invention relates to the technical field of drill tooth preparation. Specifically, it is a preparation method of cemented carbide drill teeth with high entropy alloy coating. Background technique [0002] In the fields of coal mine, hydropower, metallurgy and other fields, vertical shaft drilling rigs, vertical shaft boring machines, raise-well drilling rigs and other equipment are widely used for rolling mechanical rock breaking. The rolling rock-breaking tool for medium-hard rock is a toothed hob, and the drill teeth embedded in the outer ring of the hob cutter shell are the direct action points of rock-breaking, and its service life has a huge impact on the entire rock-breaking efficiency. [0003] During the construction and drilling process of the hob, the drill teeth on the hob are subjected to extreme service conditions such as high temperature, friction, corrosion, oxidation, erosion, etc. As a result, the drill teeth lead to premature fai...

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Problems solved by technology

[0004] For this reason, the technical problem to be solved by the present invention is to provide a method for preparing a cemented carbide drill tooth with a high-entropy alloy coating, so that the prepared cemented carbide drill tooth has high temperature resistance, friction resistance, corrosion resistance, and oxidation resistance. , erosion resistance and other properties to solve the problem of short service life caused by the failure of the drill teeth when the current rolling rock breaking bits such as hobs and cones are rolling and breaking rock in hard rock and extremely hard rock formations

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