Preparation method for DD5 nickel-base high-temperature alloy powder for 3D printing

A high-temperature alloy and 3D printing technology, which is applied in metal processing equipment, transportation and packaging, additive processing, etc., can solve the problems of inability to manufacture, complex internal structure of air-cooled hollow blades, etc.

Active Publication Date: 2017-11-07
SINO EURO MATERIALS TECH OF XIAN CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the development of engine technology, the internal structure of air-cooled hollow blades with new structures is more complicated, which cannot be produced by traditional precision casting technology

Method used

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  • Preparation method for DD5 nickel-base high-temperature alloy powder for 3D printing
  • Preparation method for DD5 nickel-base high-temperature alloy powder for 3D printing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A preparation method of DD5 nickel-based superalloy powder for 3D printing, comprising the following steps:

[0020] 1) According to mass fraction %: Cr 7.0%, Co 7.5%, W 5.0%, Al 6.2%, Ta 6.5%, Mo 1.5%, Re3.0%, Hf 0.15%, C 0.05%, the balance is Ni The chemical composition is proportioned for batching, vacuum induction melting is used to prepare DD5 master alloy ingots with a diameter of 100mm, and defects such as shrinkage holes in the head are removed;

[0021] 2) Use a high-vacuum heat treatment furnace to homogenize the composition of the DD5 master alloy ingot. The heat treatment process is: heat treatment at 1300 ° C for 24 hours, and then cool to room temperature in the furnace. During the heat treatment, the vacuum degree is -4 Pa;

[0022] 3) The DD5 alloy ingot is finished into an electrode rod with a diameter of 70mm and a length of 400mm, and the roundness deviation is less than 0.05mm, the straightness deviation is less than 0.05mm / m, and the roughness is le...

Embodiment 2

[0028] A preparation method of DD5 nickel-based superalloy powder for 3D printing, comprising the following steps:

[0029] 1) According to mass fraction %: Cr 7.0%, Co 7.5%, W 5.0%, Al 6.2%, Ta 6.5%, Mo 1.5%, Re3.0%, Hf 0.15%, C 0.05%, the balance is Ni The chemical composition is proportioned for batching, vacuum induction melting is used to prepare DD5 master alloy ingots with a diameter of 120mm, and defects such as shrinkage holes in the head are removed;

[0030] 2) Use a high-vacuum heat treatment furnace to homogenize the composition of the DD5 master alloy ingot. The heat treatment process is: heat treatment at 1350°C for 12 hours, cool to room temperature in the furnace, and the vacuum degree during the heat treatment process is -4 Pa;

[0031] 3) The DD5 alloy ingot is finished into an electrode rod with a diameter of 80mm and a length of 800mm, and the roundness deviation is less than 0.05mm, the straightness deviation is less than 0.05mm / m, and the roughness is le...

Embodiment 3

[0037] A preparation method of DD5 nickel-based superalloy powder for 3D printing, comprising the following steps:

[0038] 1) According to mass fraction %: Cr 7.0%, Co 7.5%, W 5.0%, Al 6.2%, Ta 6.5%, Mo 1.5%, Re3.0%, Hf 0.15%, C 0.05%, the balance is Ni The chemical composition is proportioned for batching, vacuum induction melting is used to prepare DD5 master alloy ingots with a diameter > 80mm, and defects such as shrinkage holes in the head are removed;

[0039] 2) Use a high-vacuum heat treatment furnace to homogenize the composition of the DD5 master alloy ingot. The heat treatment process is: 1300-1350 ° C / 12-24 h / furnace cooling to room temperature, and the vacuum degree during the heat treatment is -4 Pa;

[0040] 3) The DD5 alloy ingot is finished into an electrode rod with a diameter of 75mm and a length of 650mm, and the roundness deviation is less than 0.05mm, the straightness deviation is less than 0.05mm / m, and the roughness is less than 1.6μm;

[0041] 4)...

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Abstract

A preparation method for DD5 nickel-base high-temperature alloy powder for 3D printing includes the following steps that (1),dosing is conducted according to nominal compositions (by mass) of 7.0% of Cr, 7.5% of Co, 5.0% of W, 6.2% of Al, 6.5% of Ta, 1.5% of Mo, 3.0% of Re, 0.15% of Hf, 0.05% of C and the balance Ni, a DD5 master ingot with the diameter which is greater than 80 mm is prepared through vacuum induction melting to cut off defects of a head contraction cavity; (2) composition homogenization heat treatment is conducted on the DD5 master ingot by adopting a high vacuum heat treatment furnace, and then furnace cooling is conducted on the DD5 master ingot to the room temperature, and the vacuum degree in the heat treatment process is less than 5*10[-4] Pa; (3) the DD5 alloy ingot is fine-machined into an electrode bar; (4) DD5 alloy powder is prepared by adopting a plasma rotation electrode method, inert gas is adopted as protective gas, and the temperature of the inert gas filled into an atomizing chamber is controlled at -50-0 DEG C; and (5) under the protection of the inert gas, screening treatment is conducted on prepared spherical DD5 alloy powder by adopting a supersonic wave oscillating screen, and the spherical DD5 alloy powder is obtained, the medium powder particle size is 53-106 micron, and the fine powder particle size is 15-53 micron.

Description

technical field [0001] The invention belongs to the technical field of preparation of nonferrous metal powders, and in particular relates to a preparation method of DD5 nickel-based superalloy powder for 3D printing. Background technique [0002] DD5 alloy is a second-generation nickel-based single crystal superalloy independently developed in China. It has excellent high-temperature mechanical properties. It is used to make new aero-engines and gas turbine blades, and can serve in harsh conditions. With the development of engine technology, the internal structure of air-cooled hollow blades with new structures is more complicated, which cannot be produced by traditional precision casting technology. The development of metal 3D printing technology provides a new way to produce parts with complex shapes, while metal 3D printing technology mainly uses spherical powder with good fluidity as raw material, and requires the powder to have a suitable particle size and low impurity ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C19/05C22F1/10B22F9/10B22F1/00B33Y70/00
CPCC22C19/057C22F1/10B22F9/10B33Y70/00B22F1/065
Inventor 王庆相韩志宇梁书锦宋嘉明刘洋瞿宗宏
Owner SINO EURO MATERIALS TECH OF XIAN CO LTD
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