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
CN110666175BActive Publication Date: 2022-03-04SINO EURO MATERIALS TECH OF XIAN CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SINO EURO MATERIALS TECH OF XIAN CO LTD
Publication Date
2022-03-04

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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.
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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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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