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Method for preparing WC hard alloy wear resistance area on petroleum drill rod surface

An oil drill pipe and cemented carbide technology, which is used in manufacturing tools, welding equipment, laser welding equipment, etc., can solve problems such as no reports and unsuitable process parameters, achieve high strength, and improve wear resistance and corrosion resistance. and service life, the effect of good wetting ability

Active Publication Date: 2012-05-16
SHENYANG DALU LASER COMPLETE EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for other specific equipment components, such as specific structures such as oil drill pipes, the process parameters provided by the existing laser cladding process are obviously unable to adapt
[0015] According to the applicant's search and verification: there is no domestic precedent for the preparation of WC hard alloy wear-resistant strips on the surface of petroleum drill pipes by laser cladding technology, and no relevant reports have been seen abroad.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Example 1 Preparation of wear-resistant composite coating on the surface of oil drill pipe by rapid laser cladding

[0057] The chemical composition of the alloy powder used as the bottom layer is: C: 0.03%, Cr: 21.5%, Fe: 1.4%, Mo: 9%, Si: 0.3%, Nb: 3.6%, and the balance is Ni ;

[0058] The chemical composition of spherical WC and Ni-Cr-B-Si self-fluxing alloy mixed alloy powder as working layer is by weight percentage: WC weight percentage 70%, Ni-Cr-B-Si self-fluxing alloy mixed alloy powder is 30%; the chemical composition of the mixed alloy powder by weight percentage is: C: 0.32%, Cr: 3%, Fe: 3%, Si: 3.5%, B, 1.4%, and the balance is Ni;

[0059] The laser cladding process includes the following processes:

[0060] 1) Early machining

[0061] The parts that need to be laser clad are divided by machine added to

[0062] 2) Surface pretreatment

[0063] The processed parts were degreased with absolute ethanol at room temperature.

[0064] 3) Selection of ...

Embodiment 2

[0083] Example 2 Preparation of wear-resistant composite coating on the surface of oil drill pipe by rapid laser cladding

[0084] The chemical composition of the alloy powder used as the bottom layer is: C: 0.04%; Si: 0.5%; Fe: 1.6%; Cr: 22%; Mo: 9.5%; Nb: 4%; Ni: the balance ;

[0085] The chemical composition of spherical WC and Ni-Cr-B-Si self-fluxing alloy mixed alloy powder as the working layer is by weight percentage: 60% by weight of WC, Ni-Cr-B-Si self-fluxing alloy mixed alloy powder accounts for 40%; the chemical composition of the mixed alloy powder by weight percentage is: C: 0.34%, Cr: 3.6%, Fe: 3.5%, Si: 3.8%, B, 1.6%, and the balance is Ni;

[0086] The laser cladding process includes the following processes:

[0087] 1) Early machining

[0088] The parts that need to be laser clad are divided by machine added to

[0089] 2) Surface pretreatment

[0090] The processed parts were degreased with absolute ethanol at room temperature.

[0091] 3) Selectio...

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Abstract

The invention relates to a method for preparing a WC hard alloy wear resistance area on a petroleum drill rod surface. The method is characterized in that: the method comprises the following steps: (1) carrying out a pretreatment for the petroleum drill rod surface; (2) selecting alloy powder and adjusting an automatic powder feeding device; (3) cladding a bottoming alloy coating by a high power laser; (4) cladding spherical WC and Ni-Cr-B-Si mixed alloy powder by the high-power laser; (5) carrying out defectoscopy inspection after cladding. According to the present invention, the gradient coating method is adopted to prepare the WC hard alloy wear resistance area on the petroleum drill rod surface, the nickel-base alloy powder is adopted as the bottoming layer, the high wear resistance WC hard alloy powder is adopted as the working layer, such that the good binding strength of the working layer and the substrate is ensured in the case of meeting of the working layer characteristics, and the cracks can be prevented from expanding to the substrate during the using process, wherein the nickel-base alloy powder has good toughness and high strength, and has good metallurgy compatibility with the substrate.

Description

technical field [0001] The invention relates to a method for preparing a wear-resistant coating on the surface of a drilling device component, in particular to a method for preparing a WC hard alloy wear-resistant belt on the surface of an oil drill pipe of a drilling device using laser cladding technology, which belongs to the laser cladding technology field. Background technique [0002] The main function of the oil drill pipe joint wear-resistant band is to protect the casing and prevent the wear of the drilling tool. The surfacing is welded on the surface of the drilling tool for the purpose of double protection. It can be used on drilling tools in open hole and horizontal well engineering. It plays an important role in protecting casing, drill pipe, heavy drill pipe and drill collar from being worn out in oil drilling engineering. It can increase the service life of drilling tools by more than 3 to 5 times. [0003] The oil drill pipe joint wear-resistant band requi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10B23K26/34
Inventor 陶兴启黄旭东崔忠宝
Owner SHENYANG DALU LASER COMPLETE EQUIP
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