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Nickel-based directional high-temperature alloy laser directional additive manufacturing method

A technology of nickel-based superalloys and superalloys, which is applied in the field of laser rapid directional growth of nickel-based directional superalloy parts and laser directional material addition of nickel-based directional superalloys. The effect of dense and uniform, well-directed growth

Active Publication Date: 2018-03-09
江西瑞曼增材科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a laser directional material addition method for nickel-based directional superalloys, which solves the problem that the size of nickel-based directional superalloy parts fails due to wear and tear.

Method used

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Experimental program
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Effect test

Embodiment 1

[0032] In this embodiment, the specific steps of the nickel-based directional superalloy laser directional additive method are as follows:

[0033] 1. The superalloy powder particle size is 100-250 mesh, sphericity ≥ 95%, oxygen content ≤ 300PPM, the alloy powder used is Ni-Cr-Mo powder, and the nominal composition is Ni-19Cr-5Mo-4Nb-Ti (by weight Percentage, Cr 19%, Mo5%, Nb 4%, Ti 1%, Ni).

[0034] 2. Powder drying treatment: temperature 120℃×1.5h.

[0035] 3. Deposition substrate: DZ125 nickel-based superalloy.

[0036] 4. The base body grinds the superalloy deposition plane until it is bright and flat, cleans the plane with alcohol and acetone, and then dries it.

[0037] 5. Laser deposition vacuum glove box environment: H 2 O, O 2 ≤50PPM.

[0038] 6. Process parameters of laser deposition: continuous laser irradiation, laser power 600W, power density 10 5 W / cm 2 , the scanning speed is 6mm / s, the overlapping amount is 50%, and the irradiation spot is Φ2mm; the lase...

Embodiment 2

[0045] In this embodiment, the specific steps of the nickel-based directional superalloy laser directional additive method are as follows:

[0046] 1. The superalloy powder particle size is 100-250 mesh, sphericity ≥ 92%, oxygen content ≤ 300PPM, the alloy powder used is Ni-Cr-Nb powder, and the nominal composition is Ni-18Cr-4Nb-2Mo-Ti (by weight In terms of percentage, Cr 18%, Nb 4%, Mo 2%, Ti 1%, Ni remaining).

[0047] 2. Powder drying treatment: temperature 100℃×2h.

[0048] 3. Deposition substrate: DZ125 nickel-based superalloy.

[0049] 4. The base body grinds the superalloy deposition plane until it is bright and flat, cleans the plane with alcohol and acetone, and then dries it.

[0050] 5. Laser deposition vacuum glove box environment: H 2 O, O 2 ≤50PPM.

[0051] 6. Process parameters of laser deposition: continuous laser irradiation, laser power 800W, power density 2×10 5 W / cm 2 , the scanning speed is 10mm / s, the overlapping amount is 40%, and the irradiatio...

Embodiment 3

[0056] In this embodiment, the specific steps of the nickel-based directional superalloy laser directional additive method are as follows:

[0057] 1. The superalloy powder particle size is 100-250 mesh, sphericity ≥ 94%, oxygen content ≤ 300PPM, the alloy powder used is Co-Cr-Ni powder, and the nominal composition is Co-25Cr-11Ni-8W (by weight percentage , Cr 25%, Ni 11%, W8%, Co more).

[0058] 2. Powder drying treatment: temperature 80℃×2h.

[0059] 3. Deposition substrate: DZ125 nickel-based superalloy.

[0060] 4. The base body grinds the superalloy deposition plane until it is bright and flat, cleans the plane with alcohol and acetone, and then dries it.

[0061] 5. Laser deposition vacuum glove box environment: H 2 O, O 2 ≤50PPM.

[0062] 6. Process parameters of laser deposition: continuous laser irradiation, laser power 700W, power density 5×10 5 W / cm 2 , the scanning speed is 8mm / s, the overlapping amount is 45%, and the irradiation spot is Φ4mm; the laser coa...

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Abstract

The invention belongs to the field of metal laser additive manufacturing and specifically relates to a nickel-based directional high-temperature alloy laser directional additive manufacturing method.The method is suitable for laser quick directional growth of directional high-temperature alloy parts of complex structures and can solve the problem that part failure caused by abrasion. By utilizingthree kinds of powder of Ni-Cr-Mo, Ni-Cr-Nb and Co-Cr-Ni, laser deposition is performed by a synchronous power feeding method in a vacuum glove box; a laser deposition acting area is covered by protection gas in a deposition process; meanwhile, a liquid nitrogen continuous cooling method is utilized to cool a deposition platform to increase a temperature gradient cooled by a deposition layer; thus, quick directional additive manufacturing of nickel-based directional high-temperature alloy is achieved, and part size recovery is achieved. The invention provides the novel directional growth technological method for nickel-based directional alloy. According to the method, automatic control is utilized in a deposition process, so that an efficiency is high, deposition arborescent structure directionality is good, compactness and evenness are achieved, a heat affected zone is narrow, no hot crack is generated, and welding tensile property between the deposition layer and a matrix can reach80% or more of matrix property.

Description

technical field [0001] The invention belongs to the field of metal laser additive manufacturing, and relates to a laser orientation additive method for a nickel-based directional superalloy, which is suitable for laser rapid directional growth of nickel-based directional superalloy parts with complex structures. Background technique [0002] Superalloys have been mainly used in aero-engines since their birth. In modern advanced aero-engines, superalloy materials account for 40% to 60% of the total amount of the engine. In aero-engines, high-temperature alloys are mainly used in four hot-end components, guides, turbine blades, turbine disks and combustion chambers. At the same time, superalloys are irreplaceable materials for high-temperature hot-end components such as gas turbines and rocket engines. At present, nickel-based oriented superalloys have become the main materials for aviation applications. They are the main materials for jet aeroengine blades and hot end parts....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/105B22F1/00C22C1/04C22C19/05C22C19/07B33Y10/00B33Y70/00
CPCB22F1/0003C22C1/0433C22C19/056C22C19/07B33Y10/00B33Y70/00B22F10/00B22F10/36B22F10/34B22F10/25B22F10/38B22F10/322Y02P10/25
Inventor 迟长泰谢玉江陈祖华王明生王德陈新贵
Owner 江西瑞曼增材科技有限公司