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High-throughput test method for storage of high-temperature alloy powder in positive-negative pressure protective environment

A high-temperature alloy and test method technology, applied in the field of powder superalloy, can solve the problems of high cost, low efficiency, air leakage, etc., and achieve the effects of high production efficiency, low production cost and simple structure

Pending Publication Date: 2021-09-07
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 propose a high-throughput test method for positive and negative pressure protective environment storage of superalloy powders, to solve the traditional stainless steel package used in the prior art to evaluate the influence of storage media and storage time on superalloy powders The high cost and low efficiency brought by the sleeve sealing and welding scheme cannot meet the needs of rapid protection and packaging of superalloy powders under different conditions in the shortest time, and the repeated opening and closing of the ball valve during powder extraction can easily cause air leakage and affect the accuracy of the test. question

Method used

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  • High-throughput test method for storage of high-temperature alloy powder in positive-negative pressure protective environment

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Effect test

Embodiment 1

[0035]The concrete steps of adopting the technical solution of the present invention are as follows:

[0036] Step 1. Prepare nickel-based superalloy powder with a composition of 16Cr-13Co-4W-4Ti-4Mo-0.8Nb-2Al-0.03C (mass fraction, %) by vacuum induction melting and argon atomization, and take 1 μm ~53μm particle size section for standby;

[0037] Step 2, making the superalloy powder be transported quickly under an argon protective atmosphere, and the transport time is 5 minutes;

[0038] Step 3. Store environmental samples in a positive pressure protective atmosphere environment: pump out the residual gas in the soft packaging material container through a pipeline with a diameter of 20mm and a pumping time of 15s, and then fill the superalloy powder with the target composition and particle size through the pipeline. 150*100*20mm container, then fill it with argon gas through the pipeline, the inflation time is 20s, fill the container space after filling the powder and seal i...

Embodiment 2

[0044] The concrete steps of adopting the technical solution of the present invention are as follows:

[0045] Step 1. Prepare nickel-based superalloy powder with a composition of 16Cr-13Co-4W-4Ti-4Mo-0.8Nb-2Al-0.03C (mass fraction, %) by vacuum induction melting and argon atomization, and take 1 μm ~53μm particle size section for standby;

[0046] Step 2, making the superalloy powder be transported quickly under an argon protective atmosphere, and the transport time is 5 minutes;

[0047] Step 3. Store environmental samples in a positive pressure protective atmosphere environment: pump out the residual gas in the soft packaging material container through a pipeline with a diameter of 20mm and a pumping time of 15s, and then fill the superalloy powder with the target composition and particle size through the pipeline. 150*100*20mm container, then fill it with argon gas through the pipeline, the inflation time is 20s, fill the container space after filling the powder and seal ...

Embodiment 3

[0053] The concrete steps of adopting the technical solution of the present invention are as follows:

[0054] Step 1. Prepare nickel-based superalloy powder with a composition of 16Cr-13Co-4W-4Ti-4Mo-0.8Nb-2Al-0.03C (mass fraction, %) by vacuum induction melting and argon atomization, and take 1 μm ~53μm particle size section for standby;

[0055] Step 2, making the superalloy powder be transported quickly under an argon protective atmosphere, and the transport time is 5 minutes;

[0056] Step 3. Store environmental samples in a positive pressure protective atmosphere environment: pump out the residual gas in the soft packaging material container through a pipeline with a diameter of 20mm and a pumping time of 15s, and then fill the superalloy powder with the target composition and particle size through the pipeline. 150*100*20mm container, then fill it with argon gas through the pipeline, the inflation time is 20s, fill the container space after filling the powder and seal ...

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Abstract

The invention belongs to the field of powder high-temperature alloy, and relates to a high-throughput test method for storage of high-temperature alloy powder in a positive-negative pressure protective environment. According to the method, a low-cost soft packaging material container is adopted to be rapidly filled with alloy powder under different conditions, the interior of the container can be under positive pressure argon protection or negative pressure vacuum protection environment storage conditions, and then multi-stage vacuumizing negative pressure plastic packaging is conducted on the outermost layer so that the closed environment isolated from the outside can be kept. One sample is adopted for one storage medium and storage time parameter, and powder taking through repeated opening and closing of the same stainless steel wrapped ball valve in the prior art is not needed. The high-temperature alloy powder can be quickly subjected to influence factor tests under various protection environment storage conditions and coupling different storage times at low cost, and is directly sampled for subsequent analysis and test of the powder after being stored, so that data of multiple protection environment storage environments and storage time conditions can be obtained at high throughput; and a support is provided for storage of the nickel-based high-temperature alloy powder for powder metallurgy and additive manufacturing and evaluation of the influence of the nickel-based high-temperature alloy powder on the alloy performance.

Description

technical field [0001] The invention belongs to the field of powder superalloys, and relates to a high-throughput test method for positive and negative pressure protective environment storage of superalloy powders. Background technique [0002] Gas atomization powder preparation technology began to rise in 1965, and then developed high-purity superalloy powder preparation technology and was first applied to military aircraft engines. At present, advanced aeroengines are the first choice for powder superalloys to prepare turbine disks. The dendrite spacing of the superalloy powder is 1 to 2 orders of magnitude smaller than that of the traditional cast superalloy, and its composition segregation is also limited to the fine dendrite scale range in the spherical powder particles, so as to achieve the purpose of homogenization and make it in the preparation There are advantages in the case of high-performance turbine disks with thick and large cross-sections. In recent years, ad...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/20G01N33/208
CPCG01N33/20G01N33/208
Inventor 郑亮李周张国庆
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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