A kind of preparation method of deformed superalloy ingot

A technology for deforming superalloys and ingots, applied in the field of metal material manufacturing, can solve the problems of cracks in alloy ingots, high ingot scrapping rate, low qualification rate, etc., to reduce inclusions, improve qualification rate and metallurgical quality, Excellent quality effect

Active Publication Date: 2021-02-09
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • A kind of preparation method of deformed superalloy ingot
  • A kind of preparation method of deformed superalloy ingot
  • A kind of preparation method of deformed superalloy 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 proportion 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 ...

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 ratio 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 cut of...

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 method for preparing deformed superalloy ingots, which adopts the preparation process of raw material pretreatment + vacuum induction melting + hot charging annealing + electroslag remelting + hot charging annealing + vacuum self-consumption + hot charging annealing, wherein the raw materials Pretreatment improves and improves the cleanliness of the smelting charge. Vacuum induction melting can obtain electrodes with uniform composition. Electroslag remelting can further reduce inclusions, make the ingot structure more compact, and obtain electrode ingots with better quality. Vacuum self-consumption Remelting further refines and homogenizes the as-cast dendrite structure of the alloy, which can achieve a good feeding effect and avoid metallurgical defects such as severe segregation, porosity, and shrinkage cavities. The hot charging and annealing after each step of smelting can prevent electrode Or cracks appear in the remelting ingot during the cooling process, and finally a high-quality ingot with good surface quality, no crack defects, fine as-cast dendrite structure, low segregation, and low stress is obtained, which improves the pass rate of the ingot and has significant 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 Patents(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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