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Nickel-based complex alloy, pipe prepared from same and preparation method

A multi-alloy, nickel-based technology, applied in the field of alloy materials, can solve the problems of uneven force, pipe length limitation, easy deformation and cracking, etc., to achieve the effect of easy forming, changing processing characteristics, and reducing scrap rate

Inactive Publication Date: 2021-04-02
上海蓝铸特种合金材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the pipes are all forged into rods and then hollowed out to form pipe fittings. However, during the forging process, the alloy content of the pipes does not meet the requirements, and faults will appear in the cross section; further, during use and high temperature operation Very easy to deform and crack during the process
The larger the diameter of the pipe, the higher the probability of deformation, and the length of the pipe is limited during the hollowing process. Generally, it can only be processed under 2 meters. After increasing the processing length, it is often scrapped due to uneven force

Method used

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preparation example Construction

[0037] The present invention also provides a preparation method for the pipe, comprising the following steps:

[0038] (1) forging the alloy to obtain a blank;

[0039] (2) Heating, spinning and annealing the blank in sequence to obtain a spinning material;

[0040] (3) Heating the spinning material and passing through holes to obtain the pipe material.

[0041] In the present invention, the forging ratio in the step (1) is preferably 3.5-4.0, more preferably 3.6-3.9, more preferably 3.7-3.8.

[0042] In the present invention, the target temperature for heating in the step (2) is preferably 450-650°C, more preferably 500-600°C, more preferably 540-560°C; the heating rate is preferably 10-15°C / min, More preferably, it is 11-14 degreeC / min, More preferably, it is 12-13 degreeC / min.

[0043] In the present invention, the spindle speed of the spinning in the step (2) is preferably 120-150rpm, more preferably 130-140rpm, more preferably 133-137rpm; the precession of the spinning...

Embodiment 1

[0051] A multi-element nickel-based alloy, comprising the following components by mass: 0.08% carbon, 0.3% silicon, 0.3% manganese, 0.015% sulfur, 0.015% phosphorus, 53% nickel, 19% chromium, 1.0% cobalt, and 3.0% molybdenum , titanium 0.85%, aluminum 0.5%, niobium 2.5%, tantalum 2.5%, boron 0.006%, copper 0.25%, and the balance is iron.

[0052] The above alloy is forged with a forging ratio of 3.8 to obtain a billet; then the billet is heated with a target temperature of 550°C and a heating rate of 12°C / min; the heated billet is spun, and the spun The spindle speed is 130rpm, and the precession of spinning is 6cm / min; then annealing is carried out, and the annealing temperature is kept at 1180°C for 1h. After the heat preservation is completed, it is cooled to 230°C at a cooling rate of 10°C / min. After the target temperature, it was naturally cooled to room temperature to obtain a spinning material.

[0053] The spinning material is heated to 400°C at a heating rate of 6°C / mi...

Embodiment 2

[0057] A multi-element nickel-based alloy, comprising the following components in mass content: 0.07% carbon, 0.4% silicon, 0.2% manganese, 0.01% sulfur, 0.02% phosphorus, 50% nickel, 17% chromium, 0.5% cobalt, and 2.8% molybdenum , titanium 1.15%, aluminum 0.3%, niobium 2%, tantalum 3%, boron 0.004%, copper 0.4%, and the balance is iron.

[0058] The above alloy is forged with a forging ratio of 3.6 to obtain a billet; then the billet is heated with a target temperature of 600°C and a heating rate of 10°C / min; the heated billet is spun, and the spun The spindle speed is 140rpm, and the precession of spinning is 5cm / min; then annealing is carried out, and the annealing temperature is kept at 1160°C for 1.2h. After reaching the target temperature, it was naturally cooled to room temperature to obtain the spinning material.

[0059] The spinning material is heated to 420°C at a heating rate of 5°C / min, and then through-holed. The speed of the through-hole is 650rpm, and the spe...

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Abstract

The invention belongs to the technical field of alloy materials. According to a nickel-based complex alloy provided by the invention, by preparing the mass contents of different elements in the alloy,the processing characteristics of the alloy are changed, the alloy is easy to form in the processing process, and the rejection rate is reduced. The invention also provides a preparation method of apipe. The nickel-based complex alloy provided by the invention is forged to obtain a blank, the blank is sequentially subjected to heating, spinning and annealing to obtain a spinning material, and then heating and perforating are carried out to obtain the pipe; and the pipe obtained by the preparation method provided by the invention is uniform wall thickness, the cross section of the pipe is anintegral ring surface, no fault occurs, and the phenomena of deformation and cracking do not occur.

Description

technical field [0001] The invention relates to the technical field of alloy materials, in particular to a nickel-based multi-element alloy, a pipe made thereof and a preparation method thereof. Background technique [0002] At present, the pipes are forged into rods and then punched and hollowed out to form pipe fittings, but because the alloy content of the pipes does not meet the requirements during the forging process, faults will appear in the cross section; further, during use and high temperature operation It is very easy to deform and crack during the process. The larger the diameter of the pipe, the higher the probability of deformation, and the length of the pipe is limited during the hollowing process. Generally, it can only be processed under 2 meters. After increasing the processing length, it is often scrapped due to uneven force . Contents of the invention [0003] The purpose of the present invention is to overcome the defects in the prior art, and provid...

Claims

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Application Information

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IPC IPC(8): C22C19/05B21C37/06B21J5/00
CPCB21C37/06B21J5/002C22C19/055
Inventor 叶兴才叶勇灵
Owner 上海蓝铸特种合金材料有限公司
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