Preparation method of cobalt powder-coated diamond pellets, cobalt powder-coated diamond and application thereof

Abstract

The invention discloses a method for preparing a cobalt powder-coated diamond ball, a cobalt powder-coated diamond and an application thereof, including the following steps: a step of preparing a dispersant: adding acrylic resin, isopropanol and cobalt powder into a reactor to make The three are fully dispersed and uniform to obtain cobalt powder dispersant; wrapping step: put the diamond particles and the cobalt powder dispersant into a diamond wrapping machine, and the cobalt powder dispersant is sprayed on the surface of the diamond particles by the diamond wrapping machine , to form cobalt powder-coated diamond balls, which are then dried. The beneficial effects of the invention are mainly reflected in: the cobalt powder dispersant wraps the diamond particles, and then the cobalt powder-coated diamond is fully mixed with the cobalt powder and the tungsten carbide powder, and is used as a raw material to make a diamond-impregnated cutting element, so that the cobalt powder wraps the diamond The distribution is relatively uniform, and each area has a certain proportion of diamond volume, so that the wear performance of the entire diamond-impregnated cutting element is uniformly distributed.

Description

technical field [0001] The invention relates to the fields of drilling and machining, in particular, to a preparation method of a cobalt powder-coated diamond ball, a cobalt powder-coated diamond and applications thereof. Background technique [0002] Hard and superhard materials are commonly used in abrasive environments, many of which have important industrial applications, particularly in rock drilling, mining, oil and gas exploration and production, and metalworking and cutting applications. However, such applications require more than just high hardness, but often a range of other important properties such as: acceptable fracture toughness, corrosion resistance and high thermal conductivity. Composite structures provide some of the best and most widely used material solutions for these requirements. Over the past 60 to 70 years, it has been common to combine superhard wear-resistant materials with a ductile matrix, the most successful of which are cemented carbides, in...

AI Technical Summary

Problems solved by technology

However, we will face two main problems: high downhole temperature and high formation compressive strength

The lack of matrix will appear in the area rich in diamond particles, resulting in a decrease in the retention rate of diamond particles, while the wear performance of the area with little or no diamond particles is poor, resulting in uneven distribution of diamond impregnated bit performance, which will eventually lead to PDC Once the sawtooth is damaged on one side of the composite sheet during use, the performance of the other side will be affected, causing the drill bit to fail, which will affect the service life of the drill bit, and will also increase the production cost or use cost

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