A nano-bonding agent, a diamond composite pick made of the binder, and a method for preparing the composite pick

Abstract

The invention discloses a nanometer binding agent, a diamond-containing composite cutting tooth made from the nanometer binding agent and a manufacturing method of the diamond-containing composite cutting tooth and belongs to the field of diamond and hard alloy composite materials. The nanometer binding agent is composed of, by weight, 95%-99% of Co powder, 0.5%-3% of TiC powder and 0.5%-2% Si powder. The diamond-containing composite cutting tooth made from the nanometer binding agent comprises a hard alloy ball tooth base body, a second transition layer, a first transition layer and a polycrystalline diamond layer, wherein the second transition layer, the first transition layer and the polycrystalline diamond layer are arranged on the base body in sequence, and the polycrystalline diamond layer is composed of, by weight, 93%-97% of diamond powder and 3%-7% of nanometer binding agent. The manufacturing method of the diamond-containing composite cutting tooth comprises the steps of assembly, pre-compaction, vacuum treatment and sintering under high temperature and high pressure. The nanometer binding agent is good at promoting sintering under high temperature and high pressure, and therefore the volume ratio of diamond in a glomerocryst layer is improved, abrasive resistance and shock resistance of the diamond-containing composite cutting tooth are improved, and the service life of the diamond-containing composite cutting tooth is prolonged.

Description

technical field [0001] The invention belongs to the field of diamond and cemented carbide composite materials, and in particular relates to a nano-bonding agent and a diamond composite pick made of the bonding agent. The composite pick can be used as the cutting teeth of road milling machines to cut old asphalt concrete roads; it can also be used as cutting teeth of coal mining machinery and tunneling machinery to cut coal seams and rock formations. The invention also relates to a preparation method of the diamond composite pick. Background technique [0002] At present, cemented carbide picks are generally used in the cutting teeth of road milling machines in various places. However, in the complex asphalt concrete pavement environment, the tooth head of the cemented carbide pick wears out quickly, and the tooth head tends to become blunt, which makes it difficult to effectively cut the asphalt pavement. In view of the failure mode of the cemented carbide pick, the wear r...

AI Technical Summary

Problems solved by technology

However, in the complex asphalt concrete pavement environment, the tooth head of the cemented carbide pick wears quickly, and the tooth head is easy to become blunt, and it is difficult to form an effective cutting on the asphalt concrete road surface.

Images