Drill bit containing graphite cone

Abstract

The invention discloses a drill bit containing a graphite cone. The drill bit comprises a steel body, a matrix body and matrix blocks, wherein the steel body is connected with the matrix body, the matrix body is annular, the matrix blocks are arranged on the matrix body annularly at an interval, each matrix block comprises a high-manganese steel matrix and a plurality of graphite cones arranged in the high-manganese steel matrix, and the graphite cones are embedded into the matrix blocks in an inverted manner. By adopting the manner, when the drill bit provided by the invention is used for drilling, and the labial surface of the matrix block is in contact with the rock, due to the pressure applied on the diamond drill bit, the graphite cones and the diamond matrix body are in contact friction with the rock at the same time, and because the graphite material has small hardness, the graphite cones contacting the rock on the labial surface are worn before the high-manganese steel matrix, so that the effective contact area between the labial surface and the rock is reduced, and under the condition of the same pressure, the labial surface can provide more pressure on the rock; at the same time, the high-manganese steel matrix is subjected to impact loading, plastic deformation is generated on the surface, so that the hardness of the matrix surface is greatly increased, the wear resistance is enhanced, the rock is easily broken, the drilling speed of the drill bit is increased, and the problems that the drilling speed is low and the drill bit is seriously worn are solved.

Description

technical field [0001] The invention relates to the field of drill bits, in particular to a drill bit containing a graphite cone. Background technique [0002] Drill bits are widely used in fields such as municipal roads and bridges, construction, and exploration. The drill bit usually includes a steel body and a carcass. The carcass is provided with several tire blocks, and the contact surface between the tire blocks and the rock is its lip surface. At present, the most common on the market is the diamond bit. When the diamond bit drills, the lip surface of the diamond bit has a large contact area with the rock, so that the pressure applied by the lip surface of the matrix to the rock is not enough to break it, so that the diamond bit is drilled. The speed is slow, and although the hardness of diamond is high, when receiving a strong load, the impact cannot be used to enhance the surface hardness, and it is still easy to wear. Contents of the invention [0003] The main ...

AI Technical Summary

Problems solved by technology

At present, the most common on the market is the diamond bit. When the diamond bit drills, the lip surface of the diamond bit has a large contact area with the rock, so that the pressure applied by the lip surface of the matrix to the rock is not enough to break it, so that the diamond bit is drilled. The speed is slow, and, although the hardness of diamond is high, when receiving a strong load, the impact cannot be used to enhance the surface hardness, and it is still easy to wear

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