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Method for improving toughness of 3D printing nickel-based high-temperature alloy part

A nickel-based superalloy, 3D printing technology, applied in the field of 3D printing, can solve the problems of low high temperature toughness, hidden dangers, easy brittle fracture, etc., to achieve the effect of improving grain boundary strength, improving toughness and reducing internal stress

Active Publication Date: 2021-05-25
HUBEI SANJIANG AEROSPACE GRP HONGYANG ELECTROMECHANICAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a method for improving the toughness of 3D printed nickel-based superalloy parts to solve the problem of low high-temperature toughness of 3D printed nickel-based superalloy parts in the prior art. Lead to high brittleness, brittle fracture during use, and potential safety hazards

Method used

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  • Method for improving toughness of 3D printing nickel-based high-temperature alloy part
  • Method for improving toughness of 3D printing nickel-based high-temperature alloy part
  • Method for improving toughness of 3D printing nickel-based high-temperature alloy part

Examples

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Effect test

Embodiment 1

[0060] Example 1 provides a method for improving the toughness of 3D printed nickel-based superalloy parts. The grade of nickel-based superalloy is GH3536, and the thickness is 10mm. The details are as follows:

[0061] (1) Take out the nickel-based superalloy parts after 3D printing; the parts are required to visually inspect the surface state of the parts, and no defects such as cracking and deformation are required; at the same time, the cross-section of the parts should be observed, and the connection surface after forming should not appear unfused or inclusions , cracks and other forming defects, the powder inside the part is cleaned by vibration. Focus on cleaning the support gap and the gap position of the parts; perform dimensional inspection on the height of the parts. Use an air gun with compressed air as the air source to check the cleaning of the residual powder of the parts. It is required to blow air continuously for 3 minutes, and there is no visible powder over...

Embodiment 2

[0073] Embodiment 2 provides a method for improving the toughness of 3D printed nickel-based superalloy parts. The grade of nickel-based superalloy is GH3625, and the thickness is 10mm. The details are as follows:

[0074](1) Take out the parts after 3D printing; the parts are required to visually inspect the surface state of the parts, and no defects such as cracking and deformation are required; at the same time, the cross-section of the parts should be observed. , Use vibration to clean the powder inside the part. Focus on cleaning the support gap and the gap position of the parts; perform dimensional inspection on the height of the parts. Use an air gun with compressed air as the air source to check the cleaning of the residual powder of the parts. It is required to blow air continuously for 3 minutes, and there is no visible powder overflow.

[0075] (2) Carry out vacuum solution treatment to the nickel-based superalloy parts in step (1), the solution treatment is three-...

Embodiment 3-4

[0086] Embodiment 3-4 provides a method for improving the toughness of 3D printing nickel-based superalloy parts, with reference to Embodiment 1, the difference from Embodiment 1 is the specific process of solid solution treatment, hot isostatic pressing treatment and aging treatment Different, specifically as shown in Table 1-3, the rest are the same as in Example 1.

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Abstract

The invention provides a method for improving the toughness of a 3D printing nickel-based superalloy part, and belongs to the technical field of 3D printing. The method comprises the steps of obtaining the 3D printing nickel-based superalloy part; making solution treatment to the 3D printing nickel-based high-temperature alloy part to obtain a nickel-based high-temperature alloy part subjected to solution treatment; performing hot isostatic pressure treatment to the nickel-based high-temperature alloy part subjected to solution treatment to obtain a nickel-based high-temperature alloy part subjected to hot isostatic pressure treatment; and heating the nickel-based high-temperature alloy part subjected to hot isostatic pressure treatment to 710 DEG C-730 DEG C and holding the alloy part for 3-8 h for the first time, and performing first aging treatment and air cooling to obtain the high-toughness nickel-based high-temperature alloy part. According to the nickel-based high-temperature alloy part treated through the method, at the temperature of 1000 DEG C, the yield strength ranges from 128 MPa to 142 MPa1000 DEG C, the tensile strength ranges from 150 MPa to 168 MPa, the ductility ranges from 17% to 19.5%, and the toughness is high.

Description

technical field [0001] The invention belongs to the technical field of 3D printing, and in particular relates to a method for improving the high-temperature toughness of 3D printing nickel-based superalloy parts. Background technique [0002] The typical grade of nickel-based superalloy is GH3536. Nickel-based superalloy has medium durable strength and creep strength below 900°C. It can be used for a short time when the working temperature reaches 1080°C. It is suitable for aero-engine combustion chambers and other high-temperature components. , but because the components of the aero-engine combustion chamber have many internal flow channels and thin-walled structures, the structure is complex and the performance and precision requirements are high, the traditional forging and machining after casting cannot meet the manufacturing requirements. Therefore, at present, laser selection and melting technology is mostly used for processing. [0003] Selective laser melting (SLM) ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F10/64B22F10/66B22F10/28B33Y40/20
CPCB22F3/24B22F3/15B33Y40/20B22F2003/248Y02P10/25
Inventor 燕翔仇一卿刘巨锋岳嵩山曾俊姚勇刘礼军黄小年聂绪胜张晓娜
Owner HUBEI SANJIANG AEROSPACE GRP HONGYANG ELECTROMECHANICAL
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