A kind of composite cuniin powder and its preparation method and application

A composite, powder technology, used in metal processing equipment, transportation and packaging, coating, etc., can solve problems such as poor fretting fatigue resistance, reduce the possibility of micro-cracks, strong self-lubricating effect, long service life effect of life

Active Publication Date: 2020-12-01
BEIJING MINING & METALLURGICAL TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the technical problem of poor fretting fatigue resistance of aeroengine blade tenon in the prior art under high temperature and multi-factor coupling environment, the present invention provides a composite CuNiIn powder and its preparation method and application, which changes the self-lubricating The distribution state of the phase improves the strength and toughness of the coating, effectively avoids the occurrence of micro-cracks in the coating, and improves the self-lubricating life of the coating. It has good application value for aero-engines, gas turbines and other industries.

Method used

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preparation example Construction

[0023] Specifically, the preparation method of the composite CuNiIn powder provided by the present invention may comprise the following steps:

[0024] Step A, adopt drum type ball mill to In powder, nickel clad molybdenum disulfide powder, Al 2 o 3 The dispersion-strengthened Cu powder is mixed by ball milling, the ball-to-material ratio is 1.5-1.8:1, and the ball-milling time is 4-10 hours, so as to obtain the mixed raw material. In the mixed raw material, In powder accounts for 4-6 wt%, nickel-coated molybdenum disulfide powder accounts for 35-45 wt%, and the balance is Al 2 o 3 Dispersion strengthened copper powder.

[0025] Step B, adding the mixed raw materials into a spray drying granulator, and adding binder, dispersant, defoamer and water, so that the mass ratio of the binder to the mixed raw materials is 8 to 10:100 , the mass ratio of the mixed raw material to water is 0.9~1.2:1, the consumption of the dispersant and the defoamer are the conventional consumption...

Embodiment 1

[0042] A kind of composite CuNiIn coating, its preparation method can comprise the following steps:

[0043] Step a, Al 2 o 3 Preparation of dispersion strengthened Cu powder: Prepare CuAl alloy powder with Al content of 1-2wt% by water atomization method, then dry and sieve, take -500 mesh powder and place it in a push boat type tubular reduction furnace For internal oxidation, the thickness of the material layer is 2-3cm, the high temperature zone can accommodate 4 boats at the same time, the speed of pushing the boat is 60min / boat, and the oxygen source is N 2 +O 2 , the oxygen partial pressure is controlled at 0.1-0.2Pa, when the temperature in the pushboat-type tubular reduction furnace is room temperature to 300°C, the temperature rise rate is controlled at 3-5°C / min, when the pushboat-type tubular reduction furnace When the temperature is 300-400°C, the temperature rise rate is controlled at 1-2°C / min. When the temperature in the pushboat-type tubular reduction furna...

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Abstract

The invention discloses a composite CuNiIn powder and its preparation method and application. The composite CuNiIn powder contains a dispersion strengthening phase and a self-lubricating phase at the same time. The preparation method comprises: In powder, nickel-coated molybdenum disulfide powder, Al 2 o 3 Dispersion-strengthened Cu powder is ball-milled and mixed to obtain mixed raw materials. The mixed raw materials are centrifugally atomized and granulated by a spray drying granulator to obtain dry granules; the dried granules are vacuum sintered, and then crushed and sieved to obtain composite CuNiIn powder. The composite CuNiIn powder can be prepared into a composite CuNiIn coating containing a dispersion strengthening phase and a self-lubricating phase by a thermal spraying method. The invention changes the distribution state of the self-lubricating phase, improves the strength and toughness of the coating, effectively avoids the generation of micro-cracks in the coating, improves the self-lubricating life of the coating, and has good advantages for industries such as aeroengines and gas turbines. Value.

Description

technical field [0001] The invention relates to the field of special coating materials for aero-engines or gas turbines, in particular to a composite CuNiIn powder and its preparation method and application. Background technique [0002] The working conditions of the tenon / tenon groove of the titanium alloy blade of the aero-engine compressor are harsh, and it needs to bear the extrusion stress when it is stationary, and it needs to bear the centrifugal stress when it is working. As a result, the blade shroud gap is likely to increase, and the root of the blade may break when the stress is concentrated, which constitutes a hidden danger of fretting fatigue failure. [0003] At present, the main protection method for the tenons of active aero-engine blades is to prepare a CuNiIn coating with a thickness of about 100 μm by plasma spraying (APS), and then apply MoS on the surface of the CuNiIn coating. 2 Dry film lubricants form composite coatings. Due to MoS 2 The dry film ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C4/06C23C4/129C23C4/134B22F1/00B22F9/04
CPCC23C4/06C23C4/129C23C4/134B22F9/04B22F1/10
Inventor 于月光袁建鹏刘安强赵晓东王玉衣晓红高峰缪洋
Owner BEIJING MINING & METALLURGICAL TECH GRP CO LTD
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