A preparation method of deformed superalloy wide thin strip

A deformed superalloy, wide-width technology, which is applied in the field of preparation of deformed superalloy wide and thin strips, can solve the problems of coiling and rolling of wide-width cold-rolled strips, microstructure, performance, plate thickness, shape and surface quality, production Problems such as equipment, technical level, product quality gap, equipment and technical capabilities cannot be reached, etc., to achieve the effect of improving process plasticity and forming ability, high product quality, and improving flatness

Active Publication Date: 2022-05-27
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In the preparation of deformed superalloy cold-rolled strip, although domestic production technology has made some progress, compared with advanced countries in Europe and the United States, there is still a big gap in production equipment, technical level, product quality, etc.
In addition, limited by equipment capacity, the width of domestic deformed superalloy cold-rolled strips is mostly about 200mm, and the existing domestic technology is only for narrow strips with a width of about 200mm.
[0009] The blank thickness required for wide strips with a width ≥ 500mm is ≤ 3.0mm. However, due to the limited equipment capacity in my country, the blanks used in the production of deformed superalloy wide strips are used as plates for upstream products, and can only be produced as single sheets. Rolling cannot be produced in coils, which brings great difficulties to the quality control of downstream products such as wide cold-rolled strips in coil rolling, microstructure and performance, plate thickness, shape and surface quality.
With the development of my country's national economy and the changes in the consumption structure of the military and civilian markets, the demand for deformed superalloy wide and thin strips with a thickness of <0.3mm and a width of ≥500mm is increasing, but the current equipment and technical capabilities are not up to the standard. arrive

Method used

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  • A preparation method of deformed superalloy wide thin strip
  • A preparation method of deformed superalloy wide thin strip
  • A preparation method of deformed superalloy wide thin strip

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Several sheets of deformed superalloy GH4169 with a thickness of 1.5mm, a width of 620mm and a length of 2500mm were butted by plasma arc welding and welded into rolls. The welding voltage was 30V, the welding current was 200A, and the welding speed was 20 m / h. , Control the plasma gas consumption to 350 liters / hour.

[0049] The sheets welded into coils are warmly rolled and billeted on the warm rolling unit, and the warm rolling temperature is controlled to be 450 °C, and the warm rolling is carried out according to 3 rolling passes. 22%, the rolling speed is controlled at 10 m / min per pass, the rolling force is controlled at 600 KN per pass, and the initial strip with a thickness of 0.7 mm is rolled.

[0050] Put the 0.7mm thick initial strip in H 2 SO 4 Pickling is carried out in the pickling tank with HCl to remove the surface oxidation color. The 0.7mm thick initial strip after pickling is softened and annealed in a continuous bright annealing furnace in a hydr...

Embodiment 2

[0055] Several sheets of deformed superalloy GH4738 with a thickness of 2.0mm, a width of 630mm and a length of 2800mm were butted by plasma arc welding and welded into rolls. The welding voltage was 40V, the welding current was 250A, and the welding speed was 25 m / h. , Control the plasma gas consumption to 370 liters / hour.

[0056] The sheets welded into coils are warmly rolled and billeted on the warm rolling unit, and the warm rolling temperature is controlled to be 430 ° C, and the warm rolling is carried out according to 3 rolling passes, and the control pass deformations are 25%, 26.7%, 27%, the rolling speed is controlled at 12 m / min per pass, the rolling force is controlled at 500 KN per pass, and the initial strip with a thickness of 0.8 mm is rolled. Put the 0.8mm thick initial strip in H 2 SO 4 Pickling is carried out in the pickling tank with HCl to remove the surface oxidation color.

[0057] The 0.8mm thick initial strip after pickling was softened and anneale...

Embodiment 3

[0062] Several sheets of deformed superalloy GH3536 with a thickness of 1.8mm, a width of 610mm and a length of 2300mm were butted by plasma arc welding and welded into rolls with a welding voltage of 20V, a welding current of 300A and a welding speed of 30m / h , Control the plasma gas consumption to 400 liters / hour.

[0063] The sheets welded into coils are warmly rolled and billeted on the warm rolling unit, and the warm rolling temperature is controlled to 500 ° C, and the warm rolling is carried out according to 3 rolling passes, and the control pass deformations are 25%, 25.9%, 25%, the rolling speed is controlled at 15 m / min per pass, the rolling force is controlled at 700 KN per pass, and the initial strip with a thickness of 0.75 mm is rolled. Put the 0.75mm thick initial strip in H 2 SO 4 Pickling is carried out in the pickling tank with HCl to remove the surface oxidation color.

[0064]The 0.75mm thick initial strip after pickling was softened and annealed in a co...

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Abstract

The invention belongs to the technical field of advanced processing of superalloys, and relates to a method for preparing wide and thin strips of deformed superalloys. Pre-rolling semi-finished products, heat treatment of semi-finished strips, cold-rolled and final-rolled finished strips, solution heat treatment of finished strips, edge trimming of finished strips, feather throwing of finished strips. The invention combines welding, warm rolling, cold rolling and heat treatment processes reasonably, solves the problem of billet opening of deformed superalloy wide and thin strips, and ensures that deformed superalloy wide strips can be produced in coils and cold rolled. The high-quality deformed superalloy wide and thin strip products are of high quality, with ideal grain structure, surface roughness, and flatness control. The deformed superalloy wide and thin strip has a high pass rate and significant economic benefits, which can meet the needs of the domestic military and civilian markets. need.

Description

technical field [0001] The invention belongs to the technical field of advanced processing of superalloys, and in particular relates to a preparation method of a wide-width thin strip of deformed superalloys. Background technique [0002] According to the forming process, superalloys can be generally divided into two categories: deformed superalloys and cast superalloys. The deformed superalloy cold-rolled strip has the characteristics of high service temperature, good strength and toughness, oxidation resistance, corrosion resistance, etc. It is the basic raw material for the preparation of sheet metal stamping parts in aviation, aerospace, nuclear power, gas turbine, ship, petrochemical, machinery and other industrial sectors . [0003] Sheet metal stamping parts made of deformed superalloy strips occupy a certain proportion in advanced aviation, aerospace and other equipment, and such sheet metal parts show higher and higher structural integration, more complex structure...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23P15/00
CPCB23P15/00
Inventor 贾崇林宋颖刚王彦菊张悦王晓王曦王金雪杨丽媛
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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