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Method for preparing mechanical coating powder through slurry coating, heating and curing

A heat-cured and coated powder technology, which is applied in metal processing equipment, transportation and packaging, etc., can solve the problems of low powder yield and low production efficiency, and achieve the effect of increased yield and shortened preparation time

Active Publication Date: 2020-08-07
BEIJING MINING & METALLURGICAL TECH GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a method for preparing mechanical coating powder, which overcomes the problems of low powder yield and low preparation efficiency in the existing mechanical coating process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0025] Step 1: NiCr alloy powder is prepared by atomization process, wherein the Cr content is 20%; boron nitride powder is produced by pressing-sintering-crushing process.

[0026] Step 2: Sieve or classify the NiCr alloy powder prepared in step 1 to obtain NiCr powder with a particle size of 1-20 μm; sieve and classify the boron nitride powder prepared in step 1 to obtain boron nitride with a particle size of 60 μm-180 μm powder.

[0027] Step 3: Mix the 1-20 μm NiCr powder obtained in Step 2 with the boron nitride powder obtained in Step 2 according to a weight ratio of 4:1, the total batching amount is 50 kg, and add 5% of the total weight of polyvinyl alcohol binder, Put it into a heatable stirring tank with a diameter of 50cm and a depth of 60cm, using a turbine-type stirring paddle with a diameter of 40cm; the number of paddle blades is 6, the blade inclination angle is 45°, the blade width is 5.5cm, the blade thickness is 0.4cm, and the material is 316L stainless steel...

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Abstract

The invention discloses a method for preparing mechanical coating powder through slurry coating, heating and curing, and belongs to the technical field of aero-engines and gas turbines. The method comprises the following steps that (1), abradable component powder, skeleton component powder and a binder are configured into slurry and uniformly stirred; (2) a three-stage mechanical coating poweringprocess which is capable of simultaneously heating and stirring of "slurry wrapping + heating and curing" on uniformly dispersed slurry is carried out, the first stage is high-temperature rapid turbotype stirring to realize slurry wrapping of materials; the second section is medium-temperature medium-speed frame type stirring, so that heating and curing of an organic adhesive film are realized; and the third section is low-temperature low-speed paddle type stirring, so that flexible scattering of solid particle agglomerates is realized; and (3), screening the scattered powder is carried out to obtain final finished powder. Compared with the prior art, by the adoption of the method for preparing the mechanical coating powder through slurry coating, heating and curing, the powder yield canbe increased by 40% or above, and the powder preparation time can be shortened by 20% or above.

Description

technical field [0001] The invention belongs to the technical field of aero-engines and gas turbines, and relates to a method for preparing composite powder, in particular to a method for preparing mechanically-coated powder by wrapping, heating, and solidifying slurry. Background technique [0002] The abradable sealing coating is coated on the surface of the stator part of the gas turbine, and it can be actively worn when it is rubbed against the rotor part under high temperature and high speed conditions, so that the minimum gap between the rotor and the stator can be achieved through the interference fit of the rotor and the stator Control, while protecting rotor components from wear, is of great significance for reducing gas turbine fuel consumption, improving efficiency and operating safety. The abradable sealing coating is composed of an abradable component and a skeleton component. The abradable component is generally a non-metallic material with low shear strength s...

Claims

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Application Information

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IPC IPC(8): B22F1/00B22F9/02
CPCB22F9/02B22F1/10
Inventor 于月光刘建明章德铭沈婕刘通张鑫郭丹程旭莹黄凌峰王帅
Owner BEIJING MINING & METALLURGICAL TECH GRP CO LTD
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