A kind of non-hard phase matrix formula for impregnated diamond drill bit and preparation method thereof

A technology of impregnated diamond and hard phase is applied in the preparation of matrix, matrix formulation without hard phase and its preparation field, which can solve the problems of excessive wear of drill bits, easy segregation of density differences, short working life, etc. The sintering process is simple, the material performance is good, and the comprehensive performance is good.

Inactive Publication Date: 2017-01-25
JILIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the above-mentioned existing traditional impregnated diamond bit formula and the diamond bit prepared by the preparation method, the matrix components are complicated, the density difference is easy to segregate, cause the mixing is difficult to be uniform, the diamond bit slips and does not advance, and the matrix Too soft drill bit wears too fast, the mechanical footage speed is slow, and the working life is short, etc., and a matrix formula without hard phase for impregnated diamond drill bit and its preparation method are provided

Method used

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  • A kind of non-hard phase matrix formula for impregnated diamond drill bit and preparation method thereof

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specific example 1

[0018] The diamond composite material without hard phase matrix prepared by pressureless impregnation sintering, its composition and mass ratio are: pure Fe powder (300 mesh) 30%, pure Ni powder (200 mesh) 11%, pure Co powder 2.5% , Cu alloy 55%, P powder, B powder and Si powder (200 orders) account for 0.5% respectively, select the volume concentration of diamond particle size 35 / 40 order and 25% for use, the brazing flux quality is 30% of Cu alloy quality, use Mix the above materials evenly with alcohol, put them into a graphite mold, cover the upper layer with Cu alloy and brazing flux, dry them and place them in an intermediate frequency furnace for pressureless sintering. The sintering temperature is 1000°C, and the holding time is 5 minutes. 5mm diamond composite matrix test block. Grinding the test block with the SiC grinding wheel, the surface morphology of the diamond particles on the friction surface of the test block is good, and the interface between the diamond an...

specific example 2

[0020] The impregnated diamond drill bit without hard phase prepared by pressureless impregnation sintering, its composition and proportion are: pure Fe (300 mesh) 28%, pure Ni (200 mesh) 11%, pure Co powder 2%, Cu alloy 56 %, the quality of brazing flux is 35% of Cu alloy quality, P powder, B powder and Si powder (200 mesh) account for 1% respectively, select diamond particle size 35 / 40 mesh and 35% volume concentration, mix the above materials with alcohol Evenly, put it into a graphite mold, cover the upper layer with Cu alloy and brazing flux, dry it and place it in an intermediate frequency furnace for pressureless sintering, the sintering temperature is 1000 ° C, keep it for 10 minutes, and sinter into a diamond-impregnated drill bit without hard phase. The non-hard phase impregnated diamond drill bit prepared by the pressureless method has good formability, fast drilling speed and long working life.

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Abstract

The invention discloses a hard-phase-free matrix formula and manufacturing method for a diamond-impregnated bit. The usage quantity and grain size of diamond are selected according to a stratum drilled by the diamond. The hard-phase-free matrix formula comprises 24-31wt% of pure iron powder, 8-15wt% of pure nickel powder, 0.2-1.5wt% of phosphorus powder, 0.2-1.5wt% of boron powder, 0.2-1.5wt% of silicon powder, 46.5-66.4wt% of copper alloy, 1-3wt% of pure cobalt powder and a certain amount of brazing flux. The manufacturing method for the diamond-impregnated bit is a pressureless impregnation and high-temperature sintering method, the temperature is higher than the melting point temperature of Cu alloy by 30-150 DEG C, and heat preservation is performed for 5-30 min at the high temperature. According to the hard-phase-free matrix formula for the diamond-impregnated bit and the diamond-impregnated bit manufactured through the pressureless impregnation method, the matrix bending strength is high; the diamond holding force is large; the material cost is low; the manufacturing process is simple.

Description

technical field [0001] The invention relates to a method for preparing a matrix in the field of geological drilling and oil and gas drilling, in particular to a matrix formula without a hard phase for an impregnated diamond drill bit and a preparation method thereof. Background technique [0002] In the fields of geological drilling and oil and gas drilling, the application of impregnated diamond bits is very extensive. The formula and preparation method of impregnated diamond bits determine its performance and quality. Diamond drill bits mainly have the following two deficiencies: (1) In addition to diamond particles in the diamond drill matrix, the matrix formula includes a large proportion of hard phases such as WC and YG6, and a small proportion of Co, Mn, Ni, Ti, etc. For precious metals, rare earth elements and trace alloy elements need to be added to improve the performance of the matrix, but the composition of the matrix is ​​complex, and the density difference is ea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C9/00B22F7/08
Inventor 高科李梦孙友宏刘宝昌吴海东宋仁哲曲莉莉
Owner JILIN UNIV
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