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Cold spraying reinforcing material repairing material and repairing method of worn Roots blower cover plate

A technology for Roots blower and repair material, which is applied in the directions of coating, additive processing, and devices for coating liquid on the surface, etc., which can solve the problems such as the decrease of the sealing performance of the cover plate, the deformation of the cover plate of the Roots blower, and the limitation of the thickness of the coating layer. , to achieve the effect of improving bonding strength, eliminating pores and residual stress, and promoting full diffusion and alloying

Inactive Publication Date: 2019-03-08
LANZHOU UNIVERSITY OF TECHNOLOGY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the damaged Roots blower cover plate, the commonly used surface repair techniques include surfacing welding, thermal spraying, electric brush plating and other processes, but there are certain deficiencies. Pores, inclusions, etc. are prone to appear in the surfacing layer after surfacing welding. Defects; thermal spraying will cause serious deformation of the Roots blower cover, resulting in a decrease in the sealing of the cover; although brush plating has no thermal impact, the plating solution is seriously polluted, and the thickness of the coating is also strictly limited

Method used

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  • Cold spraying reinforcing material repairing material and repairing method of worn Roots blower cover plate
  • Cold spraying reinforcing material repairing material and repairing method of worn Roots blower cover plate
  • Cold spraying reinforcing material repairing material and repairing method of worn Roots blower cover plate

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Embodiment 1

[0025] The cold spray additive material repairing of the worn Roots blower cover plate is made of Ni60 copper-zinc powder, which is prepared from the following raw materials in mass percentage:

[0026] Ni60 55%-65%, Cu powder 24%-32%, Zn powder 6%-8%, Al 2 o 3 Powder 3%-5%, the sum of the mass percentages of each component is 100%; the Ni60, Cu, Zn powder and Al 2 o 3 The particle size range of the powder is 10-40μm; the shape of Ni60 and Cu powder is spherical, the shape of Zn powder is dendritic, and the shape of Al 2 o 3 Powder is α-phase Al with polygonal shape 2 o 3 Powder, the Ni60 copper-zinc-based powder is mechanically mixed for 4 hours according to the above ratio until uniform.

[0027] The cold-spray additive material repair process method of worn Roots blower cover plate, its repair process, comprises the steps:

[0028] (1) Pretreatment before cold spray repair of worn Roots blower cover plate, use brown corundum with a particle size of 0.5-1mm to carry o...

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Abstract

The invention provides a cold spraying reinforcing material repairing material and a repairing method of a a worn Roots blower cover plate. The material comprises, by weight, 55%-65% of Ni60, 24%-32%of Cu powder, 6%-8% of Zn powder, 3%-5% of Al2O3 powder, and the sum of the weight percentages of the components is 100%. The method comprises the following steps: (1) pre-treatment is carried out before the cold spraying of the Roots blower cover plate is worn, performing surface sand blasting treatment on the worn roots blower cover plate by using brown fused alumina; and (2) the cold spraying repair parameters of the worn Roots blower cover plate are as follows: the preheating temperature of the cold spraying base body is 100 DEG C, the temperature of spraying gas is 300-500 DEG C, the pressure is 0.6-0.8 MPa, the spraying distance is 25 mm, the powder feeding amount is 0.4g to 0.6g / s; and (3) the heat treatment parameters are as follows: the heat treatment temperature is 500-600 DEG C,the heating speed is 3 DEG C / min, the heat preservation time is 2 hours, and the mixture is cooled along with a furnace.

Description

technical field [0001] The invention relates to the field of additive repair coating preparation, in particular to an additive repair material and a repair method for a worn Roots blower cover plate. Background technique [0002] As one of the important parts in the work of Roots blower, the cover plate of Roots blower is mainly used to connect the casing and the impeller, support the rotation of the impeller, and play the role of end face sealing. Because the Roots blower cover plate is mainly worn from the end face during work, the worn cover plate cannot achieve a good sealing effect, resulting in the failure of the entire Roots blower equipment to operate normally, bringing immeasurable losses to the enterprise. If the worn Roots blower cover plate is directly replaced (completely replaced), it will increase the production cost of the enterprise. [0003] The surface repair technology only repairs the damaged area, so that the repaired parts can meet the needs of actual...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C19/03B22F1/00B05D3/12B05D3/02B05D7/14B33Y70/00
CPCB05D3/0218B05D3/0254B05D3/12B05D7/14B05D2202/10B22F1/0007B33Y70/00C22C19/002C22C19/058
Inventor 冯力王贵平华成安国升李文生路妮妮李洞亭仲军和
Owner LANZHOU UNIVERSITY OF TECHNOLOGY
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