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Spherical alloy powder as well as preparation method and laser cladding method thereof

A technology of alloy powder and laser cladding, which is applied in metal processing equipment, transportation and packaging, metal material coating technology, etc., can solve the problems of cladding layer cracks, poor oxidation resistance, research disconnection, etc., and achieve high sphericity , good fluidity and uniform particle size distribution

Active Publication Date: 2022-06-21
CHINA UNIV OF GEOSCIENCES (WUHAN)
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Relevant domestic units have also actively carried out research on laser additive technology. However, due to the lack of systematic attention to laser cladding technology and materials, the research on the two has been disconnected, resulting in some key technologies not being broken through.
[0004] For the repair work of certain domestic aero-engines, GH3044 powder is generally used as the cladding material in China for laser cladding repair, but the result after repair is not satisfactory , the surface of the cladding area after repair does not have metallic luster (poor oxidation resistance), and there are defects such as pores and cracks inside the cladding layer, and the performance has not been significantly improved

Method used

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  • Spherical alloy powder as well as preparation method and laser cladding method thereof
  • Spherical alloy powder as well as preparation method and laser cladding method thereof
  • Spherical alloy powder as well as preparation method and laser cladding method thereof

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Experimental program
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Effect test

Embodiment 1

[0024] A new type of laser cladding spherical powder was developed according to the mass fraction of the following elements, nickel balance, chromium 22.0%, tungsten 15.0%, iron 4.0%, molybdenum 1.5%, silicon 1%, aluminum 0.5%, titanium 0.6%, Manganese 0.5%, boron 0.5%, carbon 0.1%, other impurities 13% (phosphorus 0.01%, sulfur 0.01%, copper 0.07%, oxygen 0.02%, nitrogen 0.02%), the sum of the percentages of each raw material is 100%.

[0025] According to the target ingredients, put the mixture with the target ratio into the crucible, then place the crucible in the vacuum suspension furnace to heat the mixture to melt, and pour it into the tundish. After making each component qualified, it is released from the furnace, and then the obtained alloy solution is atomized, the atomization medium is argon, the atomization temperature is 1600 ℃, the atomization pressure is 4.5MPa, and the obtained powder is dried, and the drying temperature is 200 ℃, Finally, a powder with a partic...

Embodiment 2

[0033] A new type of laser cladding spherical powder was developed according to the mass fraction ratio of the following elements, nickel balance, chromium 22.0%, tungsten 15.0%, iron 4.0%, molybdenum 1.5%, silicon 1.5%, aluminum 0.5%, titanium 0.6%, Manganese 0.5%, boron 0.5%, carbon 0.1%, impurity content 0.13% (phosphorus 0.01%, sulfur 0.01%, copper 0.07%, oxygen 0.02%, nitrogen 0.02%), the sum of the percentages of each raw material is 100%.

[0034] According to the target ingredients, put the mixture with the target ratio into the crucible, then place the crucible in the vacuum suspension furnace to heat the mixture to melt, and pour it into the tundish. After making each component qualified, it is released from the furnace, and then the obtained alloy solution is atomized, the atomization medium is argon, the atomization temperature is 1600 ℃, the atomization pressure is 4.5MPa, and the obtained powder is dried, and the drying temperature is 200 ℃, Finally, a powder wit...

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Abstract

The invention discloses spherical alloy powder as well as a preparation method and a laser cladding method thereof. The spherical alloy powder comprises the following elements in percentage by mass: 22.0% of chromium, 13.0-16.0% of tungsten, less than or equal to 4.0% of iron, less than or equal to 1.5% of molybdenum, 0.5% of boron, 1-1.5% of silicon, 0.5% of aluminum, 0.3-0.7% of titanium, less than or equal to 0.5% of manganese, less than or equal to 0.1% of carbon, less than or equal to 0.13% of other impurities and the balance of nickel; the spherical alloy powder is prepared through atomization powder spraying. According to the spherical alloy powder, 0.5% of boron element is added, and the content of silicon element is increased from 0.8% to 1%-1.5%, so that oxide generated in the laser cladding process continuously floats upwards, defects such as air holes and cracks do not exist in a cladding layer, the surface of a cladding area has metallic luster, the bonding strength of the cladding area is not lower than 85% of the strength of a matrix, and the service life of the cladding area is prolonged. And the performance after repairing is relatively good.

Description

technical field [0001] The invention relates to the technical field of alloy materials, in particular to a spherical alloy powder, a preparation method thereof, and a laser cladding method. Background technique [0002] A large number of key metal parts such as turbine blades and gas casings of active aero-engines have faults such as wear and cracks after use. However, due to their high dimensional accuracy requirements and poor weldability, traditional argon arc welding and other technologies are used for repairs. After repairing, the deformation is large. The performance of the whole machine will have a greater impact, so traditional welding methods are no longer applicable during maintenance, and it is crucial to master a new repair technology. [0003] Laser cladding technology is of great significance and value in the repair of aerospace parts. In foreign countries, laser cladding technology has been relatively mature and stably applied to the repair of hot-end compone...

Claims

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Application Information

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IPC IPC(8): C22C19/05B22F1/065B22F9/08C23C24/10
CPCC22C19/055B22F9/082C23C24/106B22F2009/0824Y02P10/25
Inventor 靳洪允余雨航侯书恩
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)