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Stack mold drawing process for nickel-based superalloy thin-wall seamless tube with small diameter

A technology of nickel-based superalloy and drawing process, which is applied in the direction of wire drawing dies, etc., to reduce surface scratches, improve production efficiency, and increase the yield of pipes

Inactive Publication Date: 2021-07-27
天津冶金集团天材科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of this, the present invention provides a stack die drawing process for small-diameter thin-walled seamless pipes of nickel-based superalloys to solve the problems arising in the production process of the above-mentioned nickel-based superalloy small-diameter thin-walled seamless pipes. It can effectively improve the production efficiency of nickel-based superalloy small-diameter thin-walled seamless pipes, reduce production costs, and avoid stacking, Defects such as creases and uneven wall thickness improve the yield of products

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] When the outer diameter of the pipe is 6mm and the wall thickness is 0.2mm, the inlet diameter of the front die is 5.2mm, the diameter of the rear die is 4mm, the deformation of the pipe is 28%, and the drawing speed is 2m / min. The outer diameter is φ4mm, and the wall thickness is 0.13mm.

Embodiment 2

[0018] When the outer diameter of the pipe is φ3.0mm and the wall thickness is 0.1mm, the diameter of the entrance of the front-end die is φ2.7mn, the diameter of the entrance of the rear-end die is φ2.2mm, the deformation of the single-pass pipe is 18.7%, and the drawing speed is: 1.3m / min, the outer diameter of the obtained pipe is φ2.2, and the wall thickness is 0.05mm.

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Abstract

The invention provides a stack mold drawing process for a nickel-based superalloy thin-wall seamless tube with a small diameter. Through matching between two drawing molds which are in different sizes and are arranged tightly front and back, the drawing passes of the superalloy thin-wall seamless tube with the small diameter are reduced, the production efficiency is improved, and the production cost is reduced; meanwhile, the defects of surface scratches caused by shaking and deviation due to small contact area between the tube and the mold surface in the single-mold drawing process, and stacking, creases, uneven wall thickness and the like caused by single-pass large deformation are avoided, and therefore the yield of the tube is improved.

Description

technical field [0001] The invention relates to the field of production and processing of metal seamless pipes, in particular to a stack die drawing process of nickel-based superalloy small-diameter thin-wall seamless pipes. Background technique [0002] At present, high-temperature alloys, especially nickel-based superalloys, are widely used in the manufacture of aero-engines and various gas turbine thermal components, such as working blades, heat guide fins, turbine disks and combustion chambers of turbine parts, as well as capillary tubes for solar power generation and satellite thrusters. Tubes, power plant high-temperature steam transmission pipes, condensation pipes, hot gas conduits and other components, and also have broad application prospects in the fields of aerospace, nuclear energy, petrochemical and metallurgy. Because of its high working temperature, stable structure, few harmful phases, good resistance to oxygen and hot corrosion, and can work under higher te...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C1/22B21C3/02
CPCB21C1/22B21C3/02
Inventor 刘强厉海艳史付悦时洪亮魏玉明王静怡
Owner 天津冶金集团天材科技发展有限公司
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