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Preparation method for wrought superalloy fine-grain bar

A deformed superalloy and fine-grained technology, which is applied in the field of preparation of uniform fine-grained rods of complex alloyed deformed superalloys, can solve problems such as unfavorable rods, uniform structures, and solidification structure segregation of alloy ingots, and achieve large thermal processing The amount of deformation, the grain structure is uniform and fine, and the effect of improving the yield

Active Publication Date: 2019-11-19
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The purpose of the present invention is to provide a method for preparing deformed high-temperature alloy fine-grained rods, so as to solve the problem that large-scale ingots in the current method often lead to serious segregation of solidified structure of alloy ingots, which is not conducive to obtaining uniform structures of rods. technical problem

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  • Preparation method for wrought superalloy fine-grain bar
  • Preparation method for wrought superalloy fine-grain bar

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Embodiment 1

[0045] A method for preparing a deformed superalloy fine-grained rod, wherein the chemical composition of the deformed superalloy material includes, by weight percentage: Cr: 10.12%; Co: 15.78%; Mo: 4.05%; W: 3.42%; Al : 3.65%; Ti: 2.96%; Nb: 3.07%; C: 0.045%; the balance is Ni and unavoidable impurities. According to the chemical composition of the complex alloyed deformed superalloy, the raw materials Cr, Co, Mo, W, Al, Ti, Nb, C, and Ni are weighed and batched; a certain weight of the prepared raw materials is put into a vacuum induction furnace for melting , to prepare Φ270mm electrode rods; put complex alloyed deformed superalloy electrode rods smelted in vacuum induction furnace into vacuum consumable furnace for consumable remelting to prepare Φ320mm consumable ingots; for complex alloyed deformed superalloy Φ320mm self-consumable Consumed ingots are subjected to high-temperature diffusion homogenization annealing at 1170°C to obtain homogenized annealed ingots; both en...

Embodiment 2

[0047] A method for preparing a deformed superalloy fine-grained rod, wherein the chemical composition of the deformed superalloy material includes, by weight percentage: Cr: 11.35%; Co: 14.52%; Mo: 4.95%; W: 2.82%; Al : 3.81%; Ti: 2.79%; Nb: 3.10%; C: 0.065%; the balance is Ni and unavoidable impurities. According to the chemical composition of the complex alloyed deformed superalloy, the raw materials Cr, Co, Mo, W, Al, Ti, Nb, C, and Ni are weighed and batched; a certain weight of the prepared raw materials is put into a vacuum induction furnace for melting , to prepare Φ280mm electrode rod; put complex alloyed deformed superalloy electrode rod smelted in vacuum induction furnace into vacuum consumable furnace for consumable remelting to prepare Φ340mm consumable ingot; for complex alloyed deformed superalloy Φ340mm self-consumable Consumed ingots are subjected to high-temperature diffusion homogenization annealing at 1200°C to obtain homogenized annealed ingots; both ends ...

Embodiment 3

[0049] A method for preparing a deformed superalloy fine-grained rod, the chemical composition of the deformed superalloy material includes, by weight percentage: Cr: 11.96%; Co: 14.89%; Mo: 4.13%; W: 2.96%; Al : 3.79%; Ti: 2.92%; Nb: 3.46%; C: 0.07%; the balance is Ni and unavoidable impurities. According to the chemical composition of the complex alloyed deformed superalloy, the raw materials Cr, Co, Mo, W, Al, Ti, Nb, C, and Ni are weighed and batched; a certain weight of the prepared raw materials is put into a vacuum induction furnace for melting , to prepare Φ290mm electrode rods; put complex alloyed deformed superalloy electrode rods smelted in vacuum induction furnace into vacuum consumable furnace for consumable remelting to prepare Φ360mm consumable ingots; for complex alloyed deformed superalloy Φ360mm self-consumable Consumed ingots are subjected to high-temperature diffusion homogenization annealing at 1250°C to obtain homogenized annealed ingots; both ends of the...

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Abstract

The invention belongs to the technical field of advanced processing for superalloys, and relates to a preparation method for a wrought superalloy fine-grain bar. The preparation method for the wroughtsuperalloy fine-grain bar comprises the following steps: raw material preparation, vacuum induction furnace smelting, vacuum self-consuming re-melting, high-temperature diffusion homogenizing annealing, upsetting and blank preparation, thermal sheathing, sand blasting for a sheathed blank, glass lubricant brushing, extrusion preparation for a bar material, and sheath removal. According to the preparation method for the wrought superalloy fine-grain bar, an upsetting process and an extrusion cogging process are organically combined, and a small-specification ingot case is innovatively adoptedfor preparing the large-specification bar, so that the problems of high process deformation difficulty and difficulty to process and form, of the material, are solved; the bar is fine and uniform in grain structure; the produced complex alloyed wrought superalloy bar product is high in quality, and ideal in microstructure control; the mechanical property is enhanced and improved; and high materialqualification rate and remarkable economical benefits are achieved.

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 uniform fine-grained rods of complex alloyed deformed high-temperature alloys. Background technique [0002] Superalloys are widely used in aviation, aerospace, shipbuilding, nuclear power, petroleum, chemical and other industrial fields. According to the forming process, superalloys can generally be divided into two categories: deformed superalloys and cast superalloys. Wrought superalloys are an important class of materials for manufacturing aeroengine turbine disks. [0003] The preparation of uniform fine-grained rods or billets of deformed superalloys for turbine disks is the premise and basis for the development and production of advanced engine turbine disks. The uniformity and refinement of the grain structure of the deformed superalloy rod can ensure the uniformity and good performance of the dis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/10C22C19/05C22C1/02B21J5/08B21J5/00
CPCB21J5/002B21J5/08C22C1/023C22C19/056C22F1/10
Inventor 贾崇林李伟
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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