A hot isostatic pressing method for nickel-based superalloy powder

A nickel-based superalloy, hot isostatic pressing technology, applied to other manufacturing equipment/tools, engine components, turbines, etc., can solve problems such as original particle boundary defects, to avoid abnormal growth of grains and inhibit the formation of boundaries , the effect of improving the density of the alloy

Active Publication Date: 2022-03-04
SINO EURO MATERIALS TECH OF XIAN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a hot isostatic pressing forming method of nickel-based superalloy powder, which solves the problem of primary particle boundary defects in the manufacturing process of nickel-based superalloy discs in the prior art

Method used

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  • A hot isostatic pressing method for nickel-based superalloy powder
  • A hot isostatic pressing method for nickel-based superalloy powder
  • A hot isostatic pressing method for nickel-based superalloy powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A hot isostatic pressing method for FGH4097 alloy powder, comprising the following steps:

[0040] (1) Use the plasma rotating electrode method to prepare superalloy powder, sieve to 50-150 μm under the protection of argon, and electrostatically separate to remove non-metallic inclusions, then put the powder into a sheath and seal welding under vacuum. Abstract The attached picture shows the morphology of superalloy powder prepared by plasma rotating electrode.

[0041] (2) The package after sealing and welding is placed in the hot isostatic pressing equipment, and the hot isostatic pressing is carried out by simultaneously raising the temperature and increasing the pressure. The hot isostatic pressing temperature of the first step is 1200 ° C, the pressure is 100 MPa, and the heat preservation is 1 hour;

[0042] (3) After the first step is completed, the temperature is raised to 1300°C, and the pressure is 100MPa and kept for 30min;

[0043] (4) After the second step...

Embodiment 2

[0048] A hot isostatic pressing method for FGH4097 alloy powder, comprising the following steps:

[0049] (1) Use the plasma rotating electrode method to prepare superalloy powder, sieve to 50-150 μm under the protection of argon, and electrostatically separate to remove non-metallic inclusions, then put the powder into a sheath and seal welding under vacuum. Abstract The attached picture shows the morphology of superalloy powder prepared by plasma rotating electrode.

[0050] (2) The package after sealing and welding is placed in the hot isostatic pressing equipment, and the hot isostatic pressing is carried out by simultaneously raising the temperature and increasing the pressure. The hot isostatic pressing temperature of the first step is 1210 ° C, the pressure is 100 MPa, and the heat preservation is 1 hour;

[0051] (3) After the first step is completed, the temperature is raised to 1270°C, and the pressure is 100MPa and kept for 30min;

[0052] (4) After the second step i...

Embodiment 3

[0055] A hot isostatic pressing method for FGH4097 alloy powder, comprising the following steps:

[0056] (1) Use the plasma rotating electrode method to prepare superalloy powder, sieve to 50-150 μm under the protection of argon, and electrostatically separate to remove non-metallic inclusions, then put the powder into a sheath and seal welding under vacuum. Abstract The attached picture shows the morphology of superalloy powder prepared by plasma rotating electrode.

[0057] (2) The package after sealing and welding is placed in the hot isostatic pressing equipment, and the hot isostatic pressing is carried out by simultaneously raising the temperature and increasing the pressure. The hot isostatic pressing temperature of the first step is 1220 ° C, the pressure is 100 MPa, and the heat preservation is 1 hour;

[0058] (3) After the first step is completed, the temperature is raised to 1250 ° C, and the pressure is 100 MPa for 30 minutes;

[0059] (5) After the second step ...

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Abstract

The invention discloses a hot isostatic pressing forming method of a nickel-based superalloy powder disc, specifically a hot isostatic pressing forming method of a nickel-based superalloy powder, which is suitable for preparing powdered superalloys directly formed by hot isostatic pressing Disc, the present invention uses the superalloy powder prepared by the plasma rotating electrode method as raw material, puts the powder into the sheath under vacuum conditions and seals and welds the hot isostatic pressing, the temperature of the first hot isostatic pressing should be higher than γ' melting temperature is 10-30°C, pressure ≥100MPa, time ≤1h; after the first step is completed, the temperature is raised to 50-100°C below the liquidus temperature, the pressure is ≥100MPa, and the time is ≤30min; after the second step is completed, the temperature drops to The melting temperature of the low melting point phase is 10-20°C below the melting temperature, the pressure is ≥100MPa, the temperature is kept for 30min, and the furnace is cooled. The invention can effectively suppress the generation of PPB defects in the hot isostatic pressing process and improve the alloy density, thereby preparing a high-temperature alloy powder disk with uniform and dense structure.

Description

technical field [0001] The invention belongs to the technical field of superalloy powder metallurgy, and relates to a hot isostatic pressing forming method of nickel-based superalloy powder. Background technique [0002] The development level of the aero-engine industry is a concentrated expression of a country's industrial foundation, scientific and technological level and comprehensive national strength, and it is also an important strategic guarantee for national security and great power status. The technological progress of aero-engines is closely related to the development of superalloys, which are the most critical structural materials to promote the development of aero-engines. Military aeroengines can usually be evaluated comprehensively by their thrust-to-weight ratio. The most direct and effective technical measure to increase the thrust-to-weight ratio is to increase the gas temperature in front of the turbine, so the performance and selection of superalloy mater...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F3/15B22F9/14C22C1/04C22C19/03B22F5/00
CPCB22F3/15B22F9/14C22C1/0433C22C19/03B22F5/00
Inventor 宋嘉明徐伟罗成瞿宗宏何山陈富路王庆相赖运金梁书锦
Owner SINO EURO MATERIALS TECH OF XIAN CO LTD
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