Hot pressing high phosphorus iron base diamond drilling bit and preparation method thereof

Abstract

The invention relates to a hot compression high phosphorus iron-base diamond bit and the preparation method. The content of the diamond is 75 percent to 95 percent, the matrix materials have the component and the content that Fe powder is 35 percent to 50 percent; P is 3 percent to 6 percent; B is 1 percent to 2 percent; Ni is powder 5 percent to 10 percent; Co powder is 5 percent to 7 percent; 663-Cu powder is 25 percent to 32 percent; Mn powder is 2percent to 3 percent; Ti powder is 1 percent to 2 percent; rare earth La is 1.5 percent to 2 percent, and rare earth Ce is 1.0 percent to 1.5 percent. The preparation method comprises the procedures of material preparation, material packing and material mixture, die filling, hot-pressed sintering. The invention has the advantages that the matrix materials are widely used, and the cost is low; the sintering temperature is decreased; the hot etching of the iron to the diamond under high temperature is reduced; and the service life of the drill bit are improved; the drill bit has a broad spectrum; and the application scope is wide.

Description

technical field [0001] The invention relates to a hot-pressed high-phosphorus iron-based diamond drill bit and a preparation method thereof. Background technique [0002] The matrix material used in existing diamond drill bits for core drilling basically uses tungsten carbide as the skeleton component, and the content of tungsten carbide is as high as 55% or higher; even in the matrix composition of thin-walled diamond drill bits, tungsten carbide The content is also more than 20%. This kind of diamond drill bit has played a certain effect in the past production practice, but this kind of diamond drill bit has the following disadvantages: 1) poor adaptability; 2) matrix performance is difficult to adjust; 3) sintering process is difficult to master, for example , when drilling into hard, dense and weakly abrasive rock formations, when diamond bits with high tungsten carbide content are used, the carcass wear is often very slow, and the diamond bits are difficult to cut, and...

AI Technical Summary

Problems solved by technology

This kind of diamond drill bit has played a certain effect in the past production practice, but this kind of diamond drill bit has the following disadvantages: 1) poor adaptability; 2) matrix performance is difficult to adjust; 3) sintering process is difficult to master, for example , when drilling into hard, dense and weakly abrasive rock formations, when diamond bits with high tungsten carbide content are used, the carcass wear is often very slow, and the diamond bits are difficult to cut, and cannot play a cutting role on rocks, resulting in low drilling efficiency ; and for the soft-matrix diamond drill bit with low tungsten carbide content, the matrix wear resistance is poor, resulting in the weakening of the matrix’s ability to enclose diamonds, serious diamond grain loss, and the prematurely shed diamond wears the matrix together with the rock powder , resulting in a vicious circle, seriously affecting the use of diamond drills

At present, the price of tungsten carbide powder in the market continues to rise, the cost of traditional tungsten carbide-based diamond drill bits has increased significantly, and the competitiveness in the market has greatly declined.