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A kind of alloy drill bit and preparation method thereof

A technology of alloy drill bits and drill bits, which is applied in the direction of drill bits, drilling equipment, metal processing equipment, etc., can solve the problems of high cost, good wear resistance, impact toughness, temperature rise, etc., and achieve good corrosion resistance and fatigue resistance. High wear resistance and impact toughness, the effect of extending the service life

Active Publication Date: 2017-05-03
SEED TECH CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, in the field of drilling industry or road construction engineering, roller cone bits and polycrystalline diamond compact (PDC) bits are widely used, but they still have some insurmountable problems
The roller cone bits in the prior art are generally made of traditional tungsten-cobalt alloys. Although the traditional tungsten-cobalt alloys have the unique corrosion resistance of cemented carbide, their hardness and strength are a pair of contradictions, that is, the roller cone bits It cannot have both good wear resistance and impact toughness; therefore, under actual harsh working conditions, its mechanical properties cannot meet the requirements, and its service life will be seriously damaged
PDC drills in the prior art generally use cast iron or steel as the base material, and then clad or weld diamond composite sheets on the base surface as the hard surface wear-resistant layer. The base material is generally obtained by casting or machining. Then use thermal spraying technology to do hard surface treatment, which is often complex and costly; and in the actual drilling operation of the PDC bit, if there are foreign objects at the bottom of the well, it will cause tooth chipping or thermal friction of the PDC bit, and the temperature will rise and burn black The carcass and even the brazing layer are melted, resulting in tooth loss, which affects the ROP and accelerates the failure of the drill bit

Method used

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  • A kind of alloy drill bit and preparation method thereof
  • A kind of alloy drill bit and preparation method thereof
  • A kind of alloy drill bit and preparation method thereof

Examples

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preparation example Construction

[0073] The present invention provides a method for preparing the alloy drill bit described in the above technical solution, comprising:

[0074] Mix the hard phase, binding phase and additives to obtain a mixture, the hard phase is WC, the binding phase is one or more of Co, Ni, Fe and Cu, and the additive is TaC , MoC, Cr 3 C 2 and one or more of MnC;

[0075] The mixture is subjected to cold isostatic pressing to obtain a powder;

[0076] Carrying out shape processing to the powder base to obtain the drill bit powder base;

[0077] The drill powder compact is sintered to obtain an alloy drill.

[0078] The present invention mixes the hard phase, the binding phase and the additive to obtain the mixture, the hard phase is WC, the binding phase is one or more of Co, Ni, Fe and Cu, and the additive For TaC, MoC, Cr 3 C 2 and one or more of MnC. In the present invention, the hard phase, binder phase and additives are consistent with the hard phase, binder and additives de...

Embodiment 1

[0112] Co, Ni, TaC, MoC and WC are mixed to obtain a mixture, which contains 12wt% of Co, 6wt% of Ni, 0.5wt% of TaC, 0.5wt% of MoC, and the balance is WC. The mass ratio of the powder with a Fischer particle size of 11 μm to the powder with a Fischer particle size of 23 μm is 25:75;

[0113] The mixture was milled for 36 hours using a wet ball milling process, the ball-milling ratio during the milling process was 4:1, the milled product was vacuum-dried at 0.08MPa and 95°C, and the dried product was drum-milled Granules to obtain a mixture;

[0114] The mixture was subjected to cold isostatic pressing at 225MPa for 16 minutes to obtain a powder;

[0115] The powder base is machined using five-axis numerical control machining to obtain a drill bit powder base; first process the bottom of the powder base (the threaded part) to drill 3 oblique holes, and then dig grooves; turn over the top of the powder base, and then process the powder base. The middle part of the base; finall...

Embodiment 2

[0120] Cu, Ni, MnC and WC are mixed to obtain a mixture, which contains 20.5wt% Cu, 6.4wt% Ni, 9.7wt% MnC, and the balance is WC, and the Fischer particle size in the WC is 12 μm The mass ratio of the powder and the powder with a Fibonacci particle size of 25 μm is 40:60;

[0121] The mixture was milled for 36 hours using a wet ball milling process, the ball-milling ratio during the milling process was 3.5:1, the milled product was vacuum-dried at 0.08MPa and 95°C, and the dried product was drum-milled Granules to obtain a mixture;

[0122] The mixture was subjected to cold isostatic pressing at 250MPa for 18 minutes to obtain a powder;

[0123] The powder base is machined using five-axis numerical control machining to obtain a drill bit powder base; first process the bottom of the powder base (the threaded part) to drill 3 oblique holes, and then dig grooves; turn over the top of the powder base, and then process the powder base. The middle part of the billet; finally, 3 la...

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Abstract

The invention provides an alloy drill bit, the composition of which is: 14wt%-30wt% binder phase, the binder phase being one or more of Co, Ni, Fe and Cu; 0.32wt%-9.7wt% Additives, the additives are one or more of TaC, MoC, Cr3C2 and MnC; the balance is hard phase, and the hard phase is WC. In the alloy drill bit provided by the present invention, WC can improve the hardness and wear resistance of the alloy drill bit as a hard phase, Cu, Ni, Fe or Co can improve the corrosion resistance and fatigue resistance of the alloy drill bit as a bonding phase, TaC, MoC , Cr3C2 or MnC are additives that can further improve the high temperature resistance and wear resistance of alloy drill bits; Anti-fatigue properties.

Description

technical field [0001] The invention relates to the technical field of drill bits, in particular to an alloy drill bit and a preparation method thereof. Background technique [0002] Drill bits are a kind of wear-resistant parts in commonly used equipment in oil drilling, geological drilling and tunnel engineering. They are often in direct contact with rocks, corrosive liquids and other impurities, and achieve the purpose of drilling through friction, impact and erosion. The performance of the drill bit will directly affect the drilling quality, drilling efficiency and drilling cost. [0003] At present, in the field of drilling industry or road construction engineering, roller cone bits and polycrystalline diamond compact (PDC) bits are widely used, but they still have some insurmountable problems. The roller cone bits in the prior art are generally made of traditional tungsten-cobalt alloys. Although the traditional tungsten-cobalt alloys have the unique corrosion resista...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C29/08C22C1/05E21B10/46
CPCC22C1/051C22C29/08E21B10/46E21B10/567C22C1/1084B22F2998/10C22C1/05B22F2005/001C22C19/03C22C29/005B22F3/04B22F3/24B22F2003/245B22F2003/247B22F3/10B22F3/14B23B2224/20B23B27/14B25D2250/111B25D2222/51
Inventor 刘彬徐跃华巫吉曹志华
Owner SEED TECH CORP LTD