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GH3230 nickel-based high-temperature alloy material, method for eliminating selective laser melting forming microcracks and application of GH3230 nickel-based high-temperature alloy material

A technology of GH3230 and nickel-based superalloy, which is applied in the direction of additive processing, additive manufacturing, etc., to achieve the effect of simple doping method, improved bearing capacity and strong practicability

Active Publication Date: 2021-07-02
中航迈特增材科技(北京)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the problem of a large number of microcracks in GH3230 alloy, this disclosure proposes a method for eliminating microcracks in GH3230 nickel-based superalloy formed by laser selective melting

Method used

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  • GH3230 nickel-based high-temperature alloy material, method for eliminating selective laser melting forming microcracks and application of GH3230 nickel-based high-temperature alloy material
  • GH3230 nickel-based high-temperature alloy material, method for eliminating selective laser melting forming microcracks and application of GH3230 nickel-based high-temperature alloy material
  • GH3230 nickel-based high-temperature alloy material, method for eliminating selective laser melting forming microcracks and application of GH3230 nickel-based high-temperature alloy material

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Embodiment 1

[0045] In this embodiment, a method for eliminating microcracks in laser selective melting forming GH3230 nickel-based superalloy is provided, including the following steps:

[0046] The specific preparation method is as follows:

[0047] (1) Select GH3230 powder with an average particle size of 28.2μm and TiB with an average particle size of 500nm 2 Powder, according to the mass ratio of 99:1, prepared to contain 1.0wt.%TiB 2 composite powder.

[0048] (2) Then carry out double-centrifugal high-speed mixing and stirring for the composite powder, the mixing speed is 1500rpm, each time is 1 minute, after each mixing, cool for 20 minutes before the next mixing, until the powder is evenly mixed and there is no obvious agglomeration.

[0049] (3) Use the ConceptLaserMlab 200R metal additive manufacturing equipment to perform SLM forming on the composite powder obtained in the previous step. The detailed process parameters are as follows: laser power 190W, scanning speed 800mm / s,...

Embodiment 2

[0051] In this embodiment, a method for eliminating microcracks in laser selective melting forming GH3230 nickel-based superalloy is provided, including the following steps:

[0052] The specific preparation method is as follows:

[0053] (1) Select GH3230 powder with an average particle size of 35 μm and TiB with an average particle size of 800 nm 2 powder, respectively according to the mass ratio of 98.5:1.5, prepared to contain 1.5wt% TiB 2 composite powder.

[0054] (2) Then carry out double-centrifugal high-speed mixing and stirring for the composite powder, the mixing speed is 1500rpm, each time is 1 minute, after each mixing, cool for 20 minutes before the next mixing, until the powder is evenly mixed and there is no obvious agglomeration.

[0055] (3) Use the ConceptLaserMlab 200R metal additive manufacturing equipment to perform SLM forming on the composite powder obtained in the previous step. The detailed process parameters are as follows: laser power 200W, scanni...

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Abstract

The invention relates to the technical field of alloy preparation, and particularly provides a GH3230 nickel-based high-temperature alloy material, a method for eliminating selective laser melting forming microcracks and application of the GH3230 nickel-based high-temperature alloy material. GH3230 powder is prepared from the following elements in percentage by mass: 0.05-0.15% of C, 20-24% of Cr, less than 5% of Co, 13-15% of W, 1-3% of Mo, 0.2-0.5% of Al, less than 0.1% of Ti, less than 3% of Fe, 0.005-0.05% of La, less than 0.015% of B, 0.25-0.75% of Si, 0.3-1% of Mn, less than 0.015% of S, less than 0.03% of P, less than 0.5% of Cu, and the balance of Ni element and inevitable impurities. TiB2 powder is further included, and the mass of the TiB2 powder accounts for 0.5%-1.5% of the mass of the GH3230 alloy powder. According to the method disclosed by the invention, the microcracks in the GH3230 alloy manufactured by the SLM process can be eliminated, so that the mechanical property of a GH3230 forming component is remarkably improved.

Description

technical field [0001] The disclosure relates to the technical field of alloy preparation, and specifically provides a GH3230 nickel-based superalloy material and its method and application for eliminating microcracks formed by laser selective melting. Background technique [0002] The statements herein merely provide background information related to the present disclosure and may not necessarily constitute prior art. [0003] GH3230 alloy is a solid-solution-strengthened superalloy with Cr, W, and Mo as the main strengthening elements. It has a service temperature range of 700°C to 1050°C and has good strength, thermal stability and oxidation resistance. The performance of GH3230 alloy is greatly improved than that of GH3536, and is comparable to the oxidation resistance and creep performance of GH5188 alloy, while the structure stability, oxidation resistance and material cost of GH3230 alloy are significantly better than GH5188 alloy. Therefore, this alloy is mainly use...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C19/05C22C32/00C22C30/00C22C30/02B22F1/00B22F10/28B33Y70/10B33Y10/00
CPCB22F1/0003B33Y10/00B33Y70/10C22C19/055C22C30/00C22C30/02C22C32/0073
Inventor 韩泉泉张振华高建杨圣钊
Owner 中航迈特增材科技(北京)有限公司
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