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ZSA-3 titanium alloy pipe, and preparation method and application thereof

A titanium alloy tube, ZSA-3 technology, applied in the field of titanium alloy preparation, can solve the problems of difficult to meet the bottom hole temperature, pressure and corrosion working conditions, insufficient high temperature corrosion resistance and the like

Active Publication Date: 2017-05-10
中世钛业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Although the above titanium alloy tubes have good mechanical properties, their high temperature corrosion resistance is still insufficient.
TC4 alloy tube is only suitable for H at 60°C-80°C 2 S, CO 2 Corrosion is resistant. Once the temperature is higher than 80°C, it is difficult to meet the harsh bottom-hole temperature, pressure and corrosion conditions of oil wells. Therefore, it is urgent to develop new high-temperature corrosion-resistant oil pipes.

Method used

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  • ZSA-3 titanium alloy pipe, and preparation method and application thereof
  • ZSA-3 titanium alloy pipe, and preparation method and application thereof
  • ZSA-3 titanium alloy pipe, and preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0067] Dosing according to the following components: Al 4.6%, V 3.6%, Mo 0.4%, Zr 1.6%, Fe 0.05%, C0.03%, N 0.01%, H 0.008%, O 0.07%, and the balance is Ti; Then, it is smelted in a vacuum consumable electrode arc furnace. The smelting temperature is 1680 ° C. It is cooled by cooling circulating water while melting. After smelting, it is cooled for 90 minutes to obtain alloy ingots; the alloy ingots are forged into bars and then machined. After the bar is released from the furnace, it is pierced with a skew rolling piercer, and the piercing speed is 15mm per second; after the tube blank is repaired, it is rolled, The rolling speed is 20 times per minute, the feeding amount is 3 mm each time, and the rolling passes from the billet to the finished pipe are 5 passes to obtain the finished pipe; the finished pipe is normalized, and the normalizing temperature is 850 ℃ , the holding time is 90min, after air cooling, tempering treatment is carried out, the tempering temperature is 6...

Embodiment 2

[0069] The ingredients are as follows: Al 5.2%, V 4%, Mo 1%, Zr 2%, Fe 0.085%, C 0.055%, N 0.03%, H 0.011%, O 0.13%, and the balance is Ti; The smelting was carried out in a vacuum consumable electrode arc furnace at a smelting temperature of 2300°C, which was cooled by cooling circulating water while melting. After smelting, it was cooled for 135 minutes to obtain an alloy ingot; the alloy ingot was forged into a bar and machined into After the bar is released from the furnace, it is pierced with a skew rolling piercer, and the piercing speed is 40mm per second; after the tube blank is repaired, it is rolled and rolled. The manufacturing speed is 35 times per minute, the feeding amount is 4mm each time, and the rolling passes from the billet to the finished pipe are 3 passes to obtain the finished pipe; the finished pipe is normalized, and the normalizing temperature is 800 ℃, The holding time is 60 min, and after air cooling, tempering treatment is performed. The tempering t...

Embodiment 3

[0071]Dosing according to the following components: Al 5.4%, V 4.4%, Mo 1.3%, Zr 2.4%, Fe 0.12%, C0.08%, N 0.05%, H 0.015%, O 0.2%, and the balance is Ti; Then, it is smelted in a vacuum consumable electrode arc furnace. The smelting temperature is 3000 ℃, and it is cooled by cooling circulating water while melting. After smelting, it is cooled for 180 minutes to obtain an alloy ingot; the alloy ingot is forged and then machined. After the bar is released from the furnace, it is pierced with a skew rolling piercing machine, and the piercing speed is 60mm per second; after the tube blank is repaired, it is rolled, The rolling speed is 50 times per minute, the feeding amount is 6 mm each time, and the rolling passes from the billet to the finished pipe are 2 passes to obtain the finished pipe; the finished pipe is normalized, and the normalizing temperature is 750 ℃ , the holding time is 45min, after air cooling, tempering treatment is carried out, the tempering temperature is 4...

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Abstract

The invention discloses a ZSA-3 titanium alloy pipe, and a preparation method and application thereof. The ZSA-3 titanium alloy pipe is composed of the following components in percentage by mass: 4.6-5.4% of Al, 3.6-4.4% of V, 0.4-1.3% of Mo, 1.6-2.4% of Zr, at most 0.12% of Fe, at most 0.08% of C, at most 0.05% of N, at most 0.015% of H, at most 0.2% of O and the balance of Ti. The preparation method comprises the following steps: smelting a cast ingot according to the proportion, perforating the forged bar, rolling to obtain the finished pipe, and carrying out heat treatment, thereby obtaining the ZSA-3 titanium alloy pipe. The titanium alloy pipe has the characteristic of corrosion resistance at high temperature, and especially has very high resistance to corrosion of H2S and CO2 at 150-260 DEG C under petroleum working conditions; and the corrosion rate is lowered to 0.0006 mm / a or below. The ZSA-3 titanium alloy pipe has excellent room-temperature mechanical properties: the tensile strength is 830-1200 MPa, the yield strength is 750-1120 MPa, and the elongation percentage is 10-20%; and thus, the ZSA-3 titanium alloy pipe is a high-strength material capable of resisting corrosion of H2S and CO2 at high temperature. The ZSA-3 titanium alloy pipe has long service life, fills up the blank in China, and thus, has wide application prospects.

Description

technical field [0001] The invention relates to the technical field of titanium alloy preparation, in particular to a ZSA-3 titanium alloy tube, a preparation method and an application thereof. Background technique [0002] With the world's increasing demand for oil and gas resources, the development of oil and gas fields has gradually developed in depth. Ultra-deep and ultra-high pressure oil and gas wells are becoming common. The survey shows that in the next 3-5 years, more than 11% of the wells drilled in the ocean will have a bottom hole temperature higher than 175°C. Many onshore oil fields in my country have different degrees of drilling and completion problems under high temperature and high pressure environment. For example, in the newly developed Kuqa Piedmont block in Tarim, the bottom hole pressure exceeds 130MPa, and the bottom hole temperature is as high as 183-204 ℃. The continuous emergence of high-pressure, high-temperature, and ultra-high-pressure, high-t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C14/00C22C1/02B21C37/06
CPCB21C37/06C22C1/02C22C14/00
Inventor 张忠世郭淑君张政伟张桂艳莫喜刚于晓玲
Owner 中世钛业有限公司
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