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Preparation method of deformed high-temperature alloy ingot

A technology for deforming high-temperature alloys and ingots, which is applied in the field of metal material manufacturing, and can solve problems such as high ingot rejection rate, low pass rate, and cracks in alloy ingots, so as to improve pass rate and metallurgical quality, excellent quality, and reduce The effect of inclusions

Active Publication Date: 2019-11-01
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to disclose a method for preparing a deformed high-temperature alloy ingot, so as to solve the technical problems that the alloy ingot is prone to cracks and other metallurgical defects caused by the current traditional technology, and the ingot rejection rate is high and the qualified rate is low.

Method used

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  • Preparation method of deformed high-temperature alloy ingot
  • Preparation method of deformed high-temperature alloy ingot
  • Preparation method of deformed high-temperature alloy ingot

Examples

Experimental program
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Effect test

Embodiment 1

[0036] Pretreat the raw materials for smelting, cut the raw materials Co plate and Ni plate into small pieces, then bake the small pieces at 400°C, and then make the small pieces in the ratio of H 2 SO 4 :HCl:HNO 3: h 2 O=10%: 15%: 10%: 65% acid solution for pickling treatment, put the prepared raw materials into a vacuum induction furnace for melting, control the melting temperature during the melting process: 1550°C, and control the refining temperature of molten steel : 1530°C, pour electrode rods into the mold at the end of smelting, keep the electrode rods in the furnace for 30 minutes, control the surface temperature of the electrode rods to not be lower than 400°C, and then demould; transfer the demolded electrode rods to the pre-heated furnace immediately Anneal in an annealing furnace preheated to 400°C, heat up to 650°C, hold for 4 hours, cool the furnace to below 100°C and release from the furnace; peel off the skin of the vacuum induction electrode rod, cut off t...

Embodiment 2

[0038] Pretreat the raw materials for smelting, cut the raw materials Co plate and Ni plate into small pieces, then bake the small pieces at 450°C, and then make the small pieces in the proportion of H 2 SO 4 :HCl:HNO 3: h 2 O=15%:8%:5%:72% acid solution for pickling treatment, put the prepared raw materials into a vacuum induction furnace for melting, control the melting temperature during the melting process: 1560°C, and control the refining temperature of molten steel : 1550°C, pour electrode rods into the mold at the end of smelting, keep the electrode rods in the furnace for 35 minutes, control the surface temperature of the electrode rods to not be lower than 400°C, and then demould; transfer the demolded electrode rods to the pre-heated furnace immediately Anneal in an annealing furnace preheated to 400°C, heat up to 700°C, keep warm for 4 hours, cool the furnace to below 100°C and release from the furnace; peel off the skin of the vacuum induction electrode rod and c...

Embodiment 3

[0040] Pretreat the raw materials for smelting, cut the raw materials Co plate and Ni plate into small pieces, then bake the small pieces at 500°C, and then make the small pieces in the ratio of H 2 SO 4 :HCl:HNO 3: h 2 O = 20%: 8%: 10%: 62% acid solution for pickling treatment, put the prepared raw materials into a vacuum induction furnace for melting, control the melting temperature during the melting process: 1560°C, and control the refining temperature of molten steel : 1570°C, at the end of smelting, cast electrode rods in the mold, keep the electrode rods in the furnace for 32Min, control the surface temperature of the electrode rods to not be lower than 400°C, and then demould; transfer the demolded electrode rods to the pre-heated furnace immediately Anneal in an annealing furnace preheated to 400°C, heat up to 750°C, hold for 6 hours, cool the furnace to below 100°C and release from the furnace; peel off the skin of the vacuum induction electrode rod and cut off the...

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Abstract

The invention discloses a preparation method of a deformed high-temperature alloy ingot. The method adopts the preparation process of raw material pretreatment, vacuum induction smelting, hot-fittingannealing, electroslag remelting, hot-fitting annealing, vacuum self-consumption and hot-fitting annealing; the cleanliness of a smelting furnace material is improved through the raw material pretreatment; electrodes with uniform components can be obtained through vacuum induction smelting; the impurities can be further reduced by electroslag remelting, so that a cast ingot is compact in structureso as to obtain an electrode ingot with more excellent quality; and vacuum self-consumption remelting further enables an alloy cast-state dendritic crystal tissues to be refined and the tissues to behomogenized so as to realize a good feeding effect, and the metallurgical defects of severe segregation, looseness, shrinkage and the like are avoided. According to the method, hot-fitting annealingafter smelting in each step is carried out, so that cracks of the electrode or the re-molten ingot in the cooling process can be prevented, and finally a high-quality cast ingot with good surface quality, no crack defect, fine cast dendritic structure, low segregation and low stress is obtained, the percent of pass of the cast ingot is improved, and the high-quality cast ingot has remarkable economic benefits.

Description

technical field [0001] The invention belongs to the technical field of metal material manufacture, and relates to a method for preparing a deformed superalloy ingot, in particular to a method for preparing a highly alloyed high-quality deformed superalloy ingot. Background technique [0002] With the increase of the thrust-to-weight ratio of advanced aero-engines, the temperature before the turbine is getting higher and higher, correspondingly, the temperature of the turbine disk is required to be higher. Therefore, it is required that the superalloys (such as GH4151, GH4720Li, GH4065, etc.) used to make turbine disks have more excellent temperature bearing capacity and good comprehensive performance. This type of turbine disk superalloy has a high degree of alloying. This type of alloy contains a high total amount of solid solution strengthening elements. At the same time, the content of precipitation strengthening elements is high. In addition, the content of the main stre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B9/187C21D1/26C22B9/04C22C33/04
CPCC21D1/26C22B9/04C22B9/18C22C33/04Y02P10/25
Inventor 贾崇林于昂
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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