Mining hard alloy composite ball tooth and preparing method thereof

Abstract

The invention discloses a mining hard alloy composite ball tooth and a preparing method thereof. The mining hard alloy composite ball tooth is composed of a polycrystalline diamond layer, an intermediate layer and a hard alloy matrix layer. A cylinder is arranged at the lower end of the hard alloy matrix layer, and a hemisphere is arranged at the upper end of the hard alloy matrix layer. The polycrystalline diamond layer adheres to the outer surface of the hemisphere of the hard alloy matrix layer through the intermediate layer. The sum of the thickness of the polycrystalline diamond layer and the thickness of the intermediate layer is 2.05 mm-2.3 mm. The intermediate layer is made of titanium carbonitride and cubic boron nitride. The hard alloy matrix layer is made of titanium carbonitride, cubic boron nitride and cobalt powder. The mining hard alloy composite ball tooth with the cobalt content being increased gradually from outside to inside is obtained through preparation of the hard alloy matrix layer, preparation of the intermediate layer and the polycrystalline diamond layer and high-pressure sintering. According to the mining hard alloy composite ball tooth and the preparing method thereof, the technique is simple, the prepared composite ball tooth has extremely high abrasion resistance and tenacity, the service life can be greatly prolonged, working efficiency is improved, and operation cost is reduced.

Description

technical field [0001] The invention relates to the field of preparation of composite buttons for coal mines, in particular to a cemented carbide composite button for mines and a preparation method thereof. Background technique [0002] Tungsten carbide ball teeth and drill teeth are rock-breaking materials widely used in down-the-hole hammer bits, roller cone bits, drill bits and large-diameter hob bits. They mainly break rocks by impact and rolling. Impact or micro-impact load, when drilling into medium-hard to hard formations, can improve efficiency by 5 to 10 times compared with pure rotary drilling, and can be used as a tool in mining, oil well drilling, geological exploration and other drilling rock engineering The material is widely used, accounting for one-third of all cemented carbide. With the development of rock drilling technology, people have higher and higher quality requirements for rock drilling cemented carbide, and the quality of rock drilling cemented car...

AI Technical Summary

Problems solved by technology

[0004] In deep well construction, about 70% of the time is spent in the process of drilling and tripping. In the hard layer area, the cost of the drill bit accounts for more than 50% of the entire deep well excavation cost. It can be seen that the lack of wear resistance is the current life of the drill bit. The main reason for short and low efficiency