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Preparation method of wrought superalloy wide and thin strip

A deformed superalloy and 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: 2021-09-21
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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  • Preparation method of wrought superalloy wide and thin strip
  • Preparation method of wrought superalloy wide and thin strip
  • Preparation method of wrought superalloy wide and 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 are butt-jointed by the plasma arc welding process, and welded into rolls. The welding voltage is 30V, the welding current is 200A, and the welding speed is 20 meters per hour. , Control plasma gas consumption to 350 liters / hour.

[0049] Warm-rolling and blanking the welded coiled sheet metal on the warm-rolling unit, the temperature of the warm-rolling is controlled at 450°C, and the warm-rolling is carried out according to 3 rolling passes, and the deformation of each pass is controlled to be 20%, 25%, and 22%, the rolling speed is controlled at 10 m / min per pass, the rolling force is controlled at 600KN per pass, and rolled into an initial strip with a thickness of 0.7 mm.

[0050] The 0.7mm thick initial strip blank containing H 2 SO 4 Pickling in the pickling tank with HCl to remove the surface oxidation color. The 0.7mm thick initial strip blank aft...

Embodiment 2

[0055] Several sheets of deformed superalloy GH4738 with a thickness of 2.0mm, a width of 630mm, and a length of 2800mm are butt-jointed by the plasma arc welding process and welded into coils. The welding voltage is 40V, the welding current is 250A, and the welding speed is 25 meters per hour. , Control plasma gas consumption to 370 liters / hour.

[0056] Warm-rolling the sheet material welded into a coil is carried out on the warm-rolling unit, and the temperature of the warm-rolling is controlled at 430°C, and the warm-rolling is carried out according to 3 rolling passes, and the deformations of the controlled passes are respectively 25%, 26.7%, 27%, each pass controls the rolling speed to 12 m / min, and each pass controls the rolling force to 500KN, and rolls into an initial strip blank with a thickness of 0.8 mm. The 0.8mm thick initial strip blank containing H 2 SO 4 Pickling in the pickling tank with HCl to remove the surface oxidation color.

[0057] The 0.8mm thick i...

Embodiment 3

[0062] Several sheets of deformed superalloy GH3536 with a thickness of 1.8mm, a width of 610mm, and a length of 2300mm are butt-jointed by the plasma arc welding process, and welded into rolls. The welding voltage is 20V, the welding current is 300A, and the welding speed is 30 meters per hour. , Control plasma gas consumption to 400 liters / hour.

[0063] Warm rolling of the welded coiled sheet is carried out on the warm rolling unit, the temperature of the warm rolling is controlled at 500°C, and the warm rolling is carried out according to 3 rolling passes, and the deformation of the controlled passes is 25%, 25.9%, 25%, the rolling speed is controlled at 15 m / min in each pass, the rolling force is controlled at 700KN in each pass, and the initial strip blank with a thickness of 0.75 mm is rolled. The 0.75mm thick initial strip blank containing H 2 SO 4 Pickling in the pickling tank with HCl to remove the surface oxidation color.

[0064]The 0.75mm thick initial strip bl...

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Abstract

The invention belongs to the technical field of advanced processing of high-temperature alloys, and relates to a preparation method of a wrought superalloy wide and thin strip. The preparation method comprises the following steps of plate welding, warm rolling cogging, initial strip plate pickling, initial strip plate annealing, cold rolling primary-rolling of semi-finished products, heat treatment of semi-finished strip materials, cold rolling final-rolling of finished strip materials, solid solution heat treatment of the finished strip materials, trimming of the finished strip materials and feather-cloth-polishing of the finished strip materials. According to the preparation method, welding, warm rolling, cold rolling and heat treatment processes are reasonably combined, the problem of blanking and cogging of the wrought superalloy wide and thin strip is solved, it is guaranteed that the wrought superalloy wide and thin strip can be subjected to coiled cold rolling production, and the prepared wrought superalloy wide and thin strip is high in product quality, ideal in grain structure, surface roughness and straightness control, high in percent of pass, remarkable in economic benefit and capable of meeting the use requirements of domestic military and civilian markets.

Description

technical field [0001] The invention belongs to the technical field of advanced processing of high-temperature alloys, and in particular relates to a method for preparing wide and thin strips of deformed high-temperature alloys. Background technique [0002] According to the forming process, superalloys can generally be divided into two categories: deformed superalloys and cast superalloys. Deformed superalloy cold-rolled strip has the characteristics of high service temperature, good strength and toughness, oxidation resistance and corrosion resistance. It is the basic raw material for manufacturing sheet metal stamping parts in aviation, aerospace, nuclear power, gas turbine, shipbuilding, 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 this kind of sheet metal parts show an increasingly high degree of structu...

Claims

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Application Information

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Patent Type & Authority Applications(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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