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Method for improving high-temperature strength of Inconel 718 laser deposition layer

A laser deposition, metal powder technology, applied in coating, metal material coating process, transportation and packaging, etc., can solve the problems of difficult to meet the requirements of high-end field equipment, unstable process, low efficiency, etc., to achieve excellent high temperature The effect of friction and wear performance, process stability and high efficiency

Pending Publication Date: 2022-07-15
XIAN TECHNOLOGICAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for improving the high-temperature strength of the Inconel 718 laser-deposited layer, so as to solve the problem that it is difficult to meet the requirements of high-end equipment in the harsh high-temperature environment proposed in the above-mentioned background technology, and the process is unstable, time-consuming, The problem of inefficiency

Method used

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  • Method for improving high-temperature strength of Inconel 718 laser deposition layer
  • Method for improving high-temperature strength of Inconel 718 laser deposition layer

Examples

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Embodiment 1

[0023] Example 1, please refer to Figure 1-2 , The present invention provides a technical solution: a metal powder based on Inconel718, including the following components Inconel718 powder, Ti powder, Mo powder and nickel-coated graphite.

[0024] The particle size of Inconel718 powder is 48 μm, the particle size of Ti powder is 70 μm, the mass fraction of nickel in nickel-coated graphite is 70%, and the particle size is 40 μm;

[0025] The weight percentages of the above components are: Inconel718 is 63%, Ti is 12%, Mo powder is 10%, and nickel-coated graphite is 15%.

[0026] A preparation method of metal powder based on Inconel718, comprising the following steps;

[0027] Step (1), carry out ball-milling mixing with Inconel718 powder, Ti powder, Mo powder and nickel-coated graphite;

[0028] The adopted ball milling process parameters are: the rotational speed is 200r / min, the forward and reverse running time is 0.5h, the 6mm grinding ball is selected, the ball-to-materi...

Embodiment 2

[0036] Example 2, please refer to Figure 1-2 , the present invention provides another technical solution: a metal powder based on Inconel718, including the following components Inconel718 powder, Ti powder, Mo powder and nickel-coated graphite.

[0037] The particle size of Inconel718 powder is 53 μm, the particle size of Ti powder is 75 μm, the mass fraction of nickel in nickel-coated graphite is 75%, and the particle size is 45 μm;

[0038] The weight percentages of the above components are: Inconel718 is 63%, Ti is 10%, Mo powder is 11%, and nickel-coated graphite is 16%.

[0039] A preparation method of metal powder based on Inconel718, comprising the following steps;

[0040] Step (1), carry out ball-milling mixing with Inconel718 powder, Ti powder, Mo powder and nickel-coated graphite;

[0041] The adopted ball milling process parameters are: the rotational speed is 300r / min, the forward and reverse running time is 0.8h, the 10mm grinding ball is selected, the ball-to...

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Abstract

The invention discloses metal powder based on Inconel 718. The metal powder comprises the following components: Inconel 718 powder, Ti powder, Mo powder and nickel-coated graphite. The preparation method comprises the following steps: (1) carrying out ball milling on Inconel 718 powder, Ti powder, Mo powder and nickel-coated graphite, and uniformly mixing; (2) carrying out ultrasonic dispersion treatment on the ball-milled mixed powder for 1-2 hours, and drying in a drying oven at 100-120 DEG C for 2-2.5 hours; (3) the materials are put into a vacuum induction furnace to be smelted, vacuumizing is conducted to 2-8 Pa in the smelting process, then argon is refilled to normal pressure, energization is started to melt metal, when the temperature of metal melt reaches 1600-1700 DEG C, molten metal is conveyed to a flow guiding device, the metal flow is well adjusted, and the flow rate is controlled to be 8-10 kg / min; and (4) after the atomized powder is cooled in a collector, the atomized powder is screened on a mechanical vibration machine through a 150-mesh standard screen, and then the atomized powder is packaged and stored. After aging treatment, the high-temperature performance and the high-temperature tensile strength of a laser deposition layer can be obviously improved, and after diffusion and dissolution, the corrosion resistance is also greatly improved.

Description

technical field [0001] The invention relates to the technical field of alloy materials, in particular to a method for improving the high temperature strength of an Inconel 718 laser deposition layer. Background technique [0002] Nickel-based superalloys have excellent high-temperature strength and good oxidation resistance and gas corrosion resistance at 650-1000 °C. They are mainly used to make high-temperature components such as aero-turbine engine blades, turbine disks, and combustion chambers. Although high-temperature components made of nickel-based alloys have excellent performance, they are expensive to manufacture and their service life is limited by defects such as thermal fatigue cracks, surface wear, and hot corrosion. The replacement of high-temperature components greatly affects the operating costs of modern aero-engines and gas turbines. By forming and repairing damaged high-temperature components so that they can meet the needs of use again, it will help redu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/12B22F1/14B22F9/08C23C24/10
CPCB22F9/082C23C24/103B22F2009/0848
Inventor 黄亮曹岩梁艳峰赵海越何子博赵若辰蔡科平谷希伟
Owner XIAN TECHNOLOGICAL UNIV
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