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Forging method of super-large-specification high-temperature alloy cake blank

A superalloy and super-sized technology, which is applied in the forging field of super-sized superalloy cake blanks, can solve the problem of blank forging technology, and achieve the effects of reducing the amount of head and tail cutting, improving the total forging yield, and reducing the amount of peeling.

Pending Publication Date: 2022-07-29
西安聚能高温合金材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At the same time, as the weight of the ingot billet increases, it can no longer be used as the final forming process through conventional large-deformation elongation. At this time, the yield control of the forging process, the forgeability of the ingot and the uniformity of the final cake structure are controlled. Facing huge challenges, the current forging technology for super-large superalloy billets is still blank

Method used

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  • Forging method of super-large-specification high-temperature alloy cake blank
  • Forging method of super-large-specification high-temperature alloy cake blank
  • Forging method of super-large-specification high-temperature alloy cake blank

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Effect test

Embodiment 1

[0030] like figure 1 As shown in the figure, a forging method for super-sized superalloy cake blanks specifically includes the following contents:

[0031] Step S1, billet forging: the weight of the superalloy ingot used for forging is 6-8t, and the specification is Φ640mm. A fast forging machine is used to forge the ingot at high temperature for three times. The rough deformation is 15% to 25%, and the elongation deformation is 10% to 20%. After each fire, the billet needs to be slightly chamfered. After each fire, an intermediate billet with a square section is obtained. Return the material to the furnace for the next forging;

[0032] Step S2, forging of the intermediate blank: use a fast forging machine to forge the intermediate blank of the square section for three to five times at a medium temperature, the heating temperature of each fire is 1050 ° C to 1100 ° C, and the holding time after reaching the temperature is 3 to 5 hours. The fire forging method is upsetting ...

Embodiment 2

[0037] A method for forging super-sized superalloy cake blanks, comprising the following contents:

[0038]Step S1, billet forging: the weight of the superalloy ingot used for forging is 6.2t, and the specification is Φ640mm. A fast forging machine is used to forge the ingot at high temperature for the first fire. The heating temperature of the first fire is 1140 ° C, and after reaching the temperature, it is held for 4 hours. The forging method is upsetting and square drawing, and the upsetting deformation amount is 18 %, the deformation amount of square drawing is 12%, and the billet is slightly chamfered after drawing the square to prevent the risk of corner cracking of the billet due to the large size of the billet and the rapid temperature drop at the sharp edge. After forging in the first fire, an intermediate billet with a square cross-section is obtained. After forging, the hot material is returned to the furnace for the next forging; the heating temperature of the sec...

Embodiment 3

[0046] A method for forging super-sized superalloy cake blanks, comprising the following contents:

[0047] Step S1, billet forging: the weight of the superalloy ingot used for forging is 7t, and the specification is Φ640mm. A fast forging machine is used to forge the ingot at high temperature for the first fire. The heating temperature of the first fire is 1160°C, and after reaching the temperature, the ingot is kept for 4 hours and then released for forging. The forging method is upsetting and square drawing, and the upsetting deformation amount is 22 %, the square drawing deformation amount is 15%, and the blank is slightly chamfered after drawing the square to prevent the risk of corner cracking of the blank due to the large size of the blank and the rapid temperature drop at the sharp edge. After the first fire forging, an intermediate billet with a square cross-section is obtained. After forging, the hot material is returned to the furnace for the next fire forging; the ...

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Abstract

The invention provides a forging method of a super-large-specification high-temperature alloy cake blank, which specifically comprises the following steps: blooming and forging: carrying out three-heating-number high-temperature blooming and forging on a cast ingot in an upsetting and square drawing manner; intermediate blank forging: carrying out medium-temperature multi-heating-number octagonal upsetting and drawing forging on the square-section intermediate blank subjected to cogging forging; chamfering and rounding are conducted, specifically, one-heating-number chamfering and rounding are conducted on the octagonal-section blank obtained after the middle blank is forged; air-cooling polishing: air-cooling the rounded round section material after forging, and polishing and cleaning the surface; and finished product forging is conducted, specifically, the polished blank with the circular section is heated at low temperature, air cooling is conducted after two-heating-number large-deformation upsetting forming is conducted, and finally a cake blank meeting the specification and good in structure uniformity is obtained. According to the forging method for the super-large-specification high-temperature alloy cake blank, the technical problems that in the cogging process of the super-large-specification high-temperature alloy cake blank, the head end face and the tail end face crack, the total forging yield is low, and the structure uniformity is difficult to control are solved.

Description

technical field [0001] The invention relates to the technical field of non-ferrous metal processing methods, in particular to a forging method for super-sized superalloy cake blanks. Background technique [0002] Superalloy is a kind of metal material with iron, cobalt, nickel as matrix, and solid solution and aging strengthening with Cr, Mo, Al, Ti and other elements, which can maintain high plasticity and oxidation resistance above 600℃ properties and corrosion resistance. Widely used in aviation, aerospace, petroleum, chemical and shipbuilding. [0003] The forging process for the preparation of conventional superalloy bar billets is composed of multi-fire upsetting and drawing billets and the final large deformation drawing. Due to the larger specifications and weights of pressure vessels, pressure-resistant casings, rings, and shafts made of superalloys, the size and unit weight of the corresponding superalloy blanks are also higher. At the same time, with the increa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21J5/00B21J1/06B21J5/08B21J5/06C22F1/18
CPCB21J5/00B21J1/06B21J5/08B21J5/06C22F1/18
Inventor 李思君刘谨齐锐史新波曹国鑫阚志付宝全刘向宏
Owner 西安聚能高温合金材料科技有限公司
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