Forming method of high-strength and thin-wall longer high temperature alloy pipe

A technology of superalloy and forming method, which is applied in the field of forming high-strength and long-length thin-walled superalloy tubes, can solve the problems of fracture, wrinkle, cracks of high-strength and long-length thin-walled superalloy tubes, etc., so as to reduce hardness and increase Flexible and low-cost effects

Inactive Publication Date: 2015-04-08
CHINA HANGFA GUIZHOU LIYANG AVIATION POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of this, the object of the present invention is to provide a method for forming high-strength and large-length thin-walled superalloy pipes, so as to solve the problem of cracks, wrinkles and fractures during and after forming of high-strength and large-length thin-walled superalloy pipes. technical problem

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A method for forming high-strength and large-length thin-wall superalloy pipes, comprising the following steps:

[0025] (1) Softening: Select GH738 ultra-high-strength high-temperature alloy pipe with a diameter of ф6.3mm, a wall thickness of 0.2mm, and a length of 1800mm. Put the pipe into a vacuum furnace, adjust the temperature to 830°C, and soften the pipe for 150 minutes , so as to facilitate bending during molding;

[0026] (2) Plugging: Seal one end of the pipe tightly with a hard tapered cork, and control the length of the cork into the pipe to 15mm to ensure a tight seal, leaving a length of 40mm to facilitate pulling out the cork after forming out;

[0027] (3) Filling: inject the corundum with a fineness of 60 mesh into the pipe from the unblocked end of the pipe through the funnel, and shake or vibrate the pipe continuously during the process of filling the corundum so that the corundum can better fill the entire pipeline space. Stop filling when it is 15...

Embodiment 2

[0032] A method for forming high-strength and large-length thin-wall superalloy pipes, comprising the following steps:

[0033] (1) Softening: Select GH738 ultra-high-strength high-temperature alloy pipe with a diameter of ф8.6mm, a wall thickness of 0.1mm, and a length of 1750mm. Put the pipe into a quenching furnace, adjust the temperature to 850°C, and soften the pipe for 120 minutes , so as to facilitate bending during molding;

[0034] (2) Plugging: Seal one end of the pipe tightly with a hard tapered cork, and control the length of the cork into the pipe to 20mm to ensure a tight plug. The outer length is 40mm, which is convenient for pulling out the cork after forming out;

[0035] (3) Filling: inject the corundum with a fineness of 80 mesh into the pipe from the unblocked end of the pipe through the funnel, and shake or shake the pipe continuously during the filling process so that the corundum can better fill the entire pipeline space. Stop filling when it is 20mm a...

Embodiment 3

[0040] A method for forming high-strength and large-length thin-wall superalloy pipes, comprising the following steps:

[0041] (1) Softening: Select GH4648 ultra-high-strength high-temperature alloy pipe with a diameter of ф16mm, a wall thickness of 0.5mm, and a length of 1600mm. Put the pipe into a quenching furnace, adjust the temperature to 840°C, and soften the pipe for 130 minutes, so that bending during forming;

[0042] (2) Plugging: Seal one end of the pipe tightly with a hard tapered cork, and control the length of the cork into the pipe to 18mm to ensure a tight plug. The outer length is 30mm, which is convenient for pulling out the cork after forming out;

[0043] (3) Filling: inject the corundum with a fineness of 80 mesh into the pipe from the unblocked end of the pipe through the funnel, and shake or shake the pipe continuously during the filling process so that the corundum can better fill the entire pipeline space. Stop filling when it is 18mm away from the ...

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Abstract

The invention discloses a forming method of a high-strength and thin-wall longer high temperature alloy pipe, and belongs to the technical field of metal forming. The forming method comprises the following steps of firstly, softening a pipe by a solid melting method, tightly blocking one end of the pipe by a wood stopper, filling emery into the pipe to fill the whole pipeline space, tightly blocking the other end of the pipe by a wood stopper, putting the pipe on a forming profiling mold, slowly heating the forming part, deforming the pipe into the required shape by external force, cooling the pipe to the normal temperature, taking out the wood stoppers, and pouring out the emery, so as to complete the forming of the pipe. The forming method has the advantages that the technical problems of forming of cracks, tears, wrinkles, breaking and the like during and after forming of the high-strength and thin-wall longer highly-alloying pipe are effectively solved; the reliability is high, the cost is low, and the operation is simple and convenient.

Description

technical field [0001] The invention relates to the technical field of metal forming, in particular to a forming method of a high-strength and long-length thin-wall superalloy tube. Background technique [0002] In modern aerospace technology, a large number of high-temperature alloy materials are used to make engine structural parts and components, and with the continuous improvement of engine performance, new materials are continuously applied to corresponding types of engines. However, the use of ultra-high-strength superalloy materials on the high-temperature hot-end parts of the engine, especially as oil pipes and gas pipelines, must be bent and formed according to the corresponding shape and layout structure. However, due to the high degree of alloying of ultra-high-strength superalloys, it is easy to crack and produce cracks during forming, or produce wrinkles in the forming parts, which seriously affects the quality of products. In addition, for the forming of some ...

Claims

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Application Information

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IPC IPC(8): B21D9/03B21D9/15B21D9/18
Inventor 夏昌龙何思逸刘健罗运芬齐维斌孙平
Owner CHINA HANGFA GUIZHOU LIYANG AVIATION POWER CO LTD
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