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Powder metallurgy material used for diamond drill bit

A diamond drill bit and powder metallurgy technology, applied in the field of powder metallurgy materials, can solve the problems of damaging the mechanical properties of the matrix material, impossible to achieve alloying, uneven composition of the matrix, etc., and achieve high hardness, improve mechanical strength, and impact toughness. high effect

Inactive Publication Date: 2014-03-05
长兴巨大勘探机械有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] (1) The mesophase added to improve the performance of the matrix, due to the large difference between its melting point and the sintering temperature of the drill bit, it is impossible to achieve alloying during the sintering process of the drill bit, and the expected effect cannot be achieved, and even directly in the matrix Mixing some special elements will often seriously damage the mechanical properties of the carcass material;
[0004] (2) Easy to oxidize during storage and sintering;
[0005] (3) The composition of the carcass is uneven

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Example 1: The weight percentage of each component is: 60% of 663 bronze powder, 20% of tungsten carbide, 4% of cobalt powder, 10% of nickel powder, and 6% of manganese powder. The hardness of the obtained carcass is 20-25HRC.

Embodiment 2

[0018] Example 2: The difference from Example 1 is that the weight percentage of each component of the powder metallurgy material is: 663 bronze powder 50%, tungsten carbide 30%, cobalt powder 5%, nickel powder 9%, manganese powder 6%. The hardness of the obtained carcass is 25-30HRC.

Embodiment 3

[0019] Example 3: The difference from Example 1 is that the weight percentage of each component of the powder metallurgy material is: 45% of 663 bronze powder, 35% of tungsten carbide, 6% of cobalt powder, 7% of nickel powder, and 7% of manganese powder. The hardness of the obtained carcass is 30-35HRC.

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PUM

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Abstract

The invention discloses a powder metallurgy material used for a diamond drill bit. The powder metallurgy material is composed of, by weight, 25-60% of bronze powder, 20-55% of tungsten carbide, 4-9% of cobalt powder, 5-10% of nickel powder and 5-7% of manganese powder. A diamond drill bit matrix manufactured by using the powder metallurgy material through sintering has the advantages of good sintering performance, uniformity in alloying component portion, less proneness to oxidation in the process of sintering and good mechanical performance.

Description

technical field [0001] The invention relates to a powder metallurgy material used for a diamond drill bit. technical background [0002] For diamond drill bits, due to the harsher working environment, the requirements for its matrix performance are more stringent, and the bit matrix material added in the form of a single element for mechanical mixing has the following disadvantages: [0003] (1) The mesophase added to improve the performance of the matrix, due to the large difference between its melting point and the sintering temperature of the drill bit, it is impossible to achieve alloying during the sintering process of the drill bit, and the expected effect cannot be achieved, and even directly in the matrix Mixing some special elements will often seriously damage the mechanical properties of the carcass material; [0004] (2) Easy to oxidize during storage and sintering; [0005] (3) The composition of the carcass is uneven. Contents of the invention [0006] The ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/00
Inventor 倪曙光
Owner 长兴巨大勘探机械有限公司
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