Preparation method of titanium alloy seamless pipe in petroleum and natural gas industry

A technology for oil and natural gas and seamless pipes, used in metal rolling, manufacturing tools, heat treatment equipment, etc., can solve the problems of long processing process, limited large-area application, low yield, etc., to improve the preparation method and shorten the process. , the effect of low cost

Inactive Publication Date: 2019-01-29
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the processing process is long and the yield is low, resulting in...

Method used

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Examples

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Embodiment 1

[0018] The preparation method of the present embodiment comprises the following steps:

[0019] Step 1. Mix and press zero-grade sponge titanium, HZr-1 grade zirconium sponge, aluminum beans, AlMo60, AlV85, TiSn80 and AlNb75 to form an electrode block and weld the electrode block into an electrode. Put the electrode into a crucible with a diameter of 160mm. The Ti90 titanium alloy ingot is obtained by a vacuum self-consumption smelting in an electric arc furnace, and then the Ti90 titanium alloy ingot is placed in a vacuum electron beam furnace for a vacuum electron beam melting to obtain a Ti90 titanium alloy cast billet with a diameter of 70mm , and then the Ti90 titanium alloy cast billet is heated to (T β +20) ℃ heat preservation for 56min for high temperature homogenization heat treatment, where T β at 930°C, air-cooled and machined to obtain a Ti90 titanium alloy cross-rolled perforated billet with a diameter of 60 mm; the impurity elements in the Ti90 titanium alloy in...

Embodiment 2

[0025] The preparation method of the present embodiment comprises the following steps:

[0026] Step 1. Mix and press zero-grade sponge titanium, HZr-1 grade zirconium sponge, aluminum beans, AlMo60, AlV85, TiSn80 and AlNb75 to form an electrode block and weld the electrode block into an electrode. Put the electrode into a crucible with a diameter of 160mm. The Ti90 titanium alloy ingot is obtained by a vacuum self-consumption smelting in an electric arc furnace, and then the Ti90 titanium alloy ingot is placed in a vacuum electron beam furnace for a vacuum electron beam melting to obtain a Ti90 titanium alloy cast billet with a diameter of 85mm , and then the Ti90 titanium alloy cast billet is heated to (T β +20) ℃ heat preservation for 68min for high temperature homogenization heat treatment, where T β at 930°C, air-cooled and machined to obtain a Ti90 titanium alloy cross-rolled perforated billet with a diameter of 75 mm; the impurity elements in the Ti90 titanium alloy in...

Embodiment 3

[0032] The preparation method of the present embodiment comprises the following steps:

[0033] Step 1. Mix and press zero-grade sponge titanium, HZr-1 grade zirconium sponge, aluminum beans, AlMo60, AlV85, TiSn80 and AlNb75 to form an electrode block and weld the electrode block into an electrode. Put the electrode into a crucible with a diameter of 200mm. The Ti90 titanium alloy ingot is obtained by a vacuum self-consumption smelting in an electric arc furnace, and then the Ti90 titanium alloy ingot is placed in a vacuum electron beam furnace for a vacuum electron beam melting to obtain a Ti90 titanium alloy cast billet with a diameter of 190mm , and then the Ti90 titanium alloy cast billet is heated to (T β +25) ℃ heat preservation for 152min for high temperature homogenization heat treatment, where T β at 930°C, air-cooled and machined to obtain a Ti90 titanium alloy cross-rolled perforated billet with a diameter of 180 mm; the impurity elements in the Ti90 titanium alloy...

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Abstract

The invention discloses a preparation method of a titanium alloy seamless pipe in the petroleum and natural gas industry. The preparation method comprises the following steps that S1, electrodes are prepared according to nominal compositions of the titanium alloy in the petroleum and natural gas industry, vacuum self-consumption smelting and vacuum casting are conducted, and titanium alloy skew rolling punching rod blanks are obtained after high temperature homogenization heat treatment; S2, the titanium alloy skew rolling punching rod blanks are subjected to skew rolling punching to obtain titanium alloy punching pipe blanks; S3, the titanium alloy punching pipe blanks are subjected to diameter determining and rolling to obtain titanium alloy seamless pipes; and S4, the titanium alloy seamless pipes are subjected to isothermal annealing heat treatment to obtain titanium alloy seamless pipes for the petroleum and natural gas industry. The titanium alloy cast rod blanks prepared by vacuum self-consumption smelting and vacuum casting are subjected to high temperature homogenization heat treatment, and are subjected to skew rolling punching at the beta phase transformation point to obtain the punching pipe blanks, the casting process is omitted, procedures are shortened, and the yield rate is improved. With combination of isothermal annealing heat treatment above the beta phase transformation point, microstructure uniformity is improved. The mechanical property of products is improved, and application in the petroleum and natural gas industry is achieved.

Description

technical field [0001] The invention belongs to the technical field of titanium alloy pipe preparation, and in particular relates to a method for preparing a titanium alloy seamless pipe used in the oil and gas industry. Background technique [0002] At present, the depth of oil and gas wells in my country is getting bigger and bigger. Traditional seamless steel pipes cannot meet the requirements of pipe quality when mining depth increases, and seamless steel pipes are prone to corrosion, especially in high temperature, high pressure, high hydrogen sulfide and carbon dioxide. Under the working conditions of oil and gas industry. Titanium alloy seamless pipe can solve the above problems well because of its low density and good corrosion resistance. SY / T 6896.3—2016 "Technical Specifications for Special Pipes in the Petroleum and Natural Gas Industry Part 3: Titanium Alloy Oil Pipes" requires the manufacturing process of titanium alloy oil pipes as follows: Titanium alloy oil ...

Claims

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Application Information

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IPC IPC(8): C22C1/02C22B9/20B22D23/06B22D27/15C22F1/18C21D9/08C21D8/10B21C37/06B21B19/06
CPCB21B19/06B21C37/06B22D23/06B22D27/15C21D8/10C21D9/08C22B9/20C22C1/02C22F1/183
Inventor 毛成亮赵彬李思兰洪权贾蔚菊尹雁飞应扬
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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