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Titanium alloy petroleum drill rod wear-resistant belt and preparation method thereof

A technology for oil drill pipes and titanium alloys, which is applied in the coating process and coating of metal materials, etc., which can solve the problems of large differences in physical properties of steel and titanium, stress cracking of substrate and wear-resistant belt, and dilution rate reducing wear-resistant layer performance. and other problems, to achieve the effect of small dilution, small residual stress, and suppression of cracks

Active Publication Date: 2020-05-12
中机新材料研究院(郑州)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the physical properties of steel and titanium are quite different, and it is difficult to achieve an effective combination through surfacing welding, and surfacing welding produces a large heat input, which is easy to cause stress cracking on the substrate and wear-resistant band, and a large dilution rate will also reduce the resistance. Grinding performance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A wear-resistant strip of an ultra-deep oil well titanium alloy drill pipe and a preparation method thereof, specifically comprising the following steps:

[0023] (1) Prepare the TC4 titanium alloy drill pipe joint substrate, degrease and clean the surface, and grind to obtain a surface roughness Ra≈10 μm

[0024] (2) The Ti6Al4V titanium alloy powder is prepared by vacuum argon atomization, the particle size range is 25-80 μm, the D50 is 25-40 μm, and the fluidity is ≤25s / 50g. B 4 The particle size of C powder ranges from 5 to 15 μm. Ti6Al4V titanium alloy powder and B 4 C powder is mixed at a ratio of 95%:5%, put the mixed powder into a vacuum ball mill for ball milling for 6-8 hours, and dry for 0.5-1.0 hours

[0025] (3) The mixed powder is clad on the surface of the drill pipe substrate by using ultra-high-speed laser cladding technology. The thickness of a single layer of cladding is 0.4mm, and a total of 2 layers of cladding are used. The total cladding thickn...

Embodiment 2

[0030] A wear-resistant strip of an ultra-deep oil well titanium alloy drill pipe and a preparation method thereof, specifically comprising the following steps:

[0031] (1) Prepare the TC4 titanium alloy drill pipe joint substrate, degrease and clean the surface, and grind to obtain a surface roughness Ra≈5 μm

[0032] (2) The Ti6Al4V titanium alloy powder is prepared by vacuum argon atomization, the particle size range is 25-80 μm, the D50 is 25-40 μm, and the fluidity is ≤25s / 50g. B 4 The particle size of C powder ranges from 5 to 15 μm. Ti6Al4V titanium alloy powder and B 4 C powder is mixed at a ratio of 93%:10%, put the mixed powder into a vacuum ball mill for ball milling for 6-8 hours, and dry for 0.5-1.0 hours

[0033] (3) Using ultra-high-speed laser cladding technology to clad the mixed powder on the surface of the drill pipe substrate, the single-layer cladding thickness is 0.4mm, a total of 2 layers of cladding, the total cladding thickness is 0.8mm, and the cl...

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Abstract

The invention discloses a titanium alloy petroleum drill rod wear-resistant belt and a preparation method thereof. A particle-reinforced titanium-based wear-resistant belt material layer is prepared on the surface of a titanium alloy matrix by adopting an ultrahigh-speed laser cladding method, and specifically, Ti6Al4V titanium alloy powder and B4C powder are selected to be mixed in proportion andsubjected to vacuum ball milling, a coating is prepared on a TA15 titanium alloy matrix through an ultra-high-speed laser cladding process, Ti and B4C generate TiB, TiC and other precipitated reinforcing phases in situ, the hardness and abrasion resistance of the cladding coating are improved, and meanwhile, Ti-based corrosion resistance is combined, the titanium alloy petroleum drill rod wear-resistant belt is applied to drilling of ultra-deep oil wells.

Description

technical field [0001] The invention belongs to the field of material processing, and in particular relates to a titanium alloy oil drill pipe wear-resistant strip and a preparation method thereof. Background technique [0002] With the continuous development of the petroleum industry, oil wells with special conditions have put forward more stringent requirements for drilling technology, especially for ultra-deep oil wells. Conventional alloy steel drill pipes have greater torque due to their high specific gravity, which is more difficult for drilling equipment. It brings serious workload, and the corrosion resistance of alloy steel is poor. During the drilling process, it is affected by the interaction of wear and corrosion, and damage and failure will occur soon, which cannot guarantee long-term work. Titanium alloy materials have the characteristics of high strength, low density, small structural stress, fatigue resistance and corrosion resistance, and are especially suit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10C22C14/00C22C32/00
CPCC22C14/00C22C32/0057C23C24/103
Inventor 王淼辉杜博睿葛学元肖宁郝胜徐一斐申博文
Owner 中机新材料研究院(郑州)有限公司
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