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Preparation method of Al-modified MoSi2-SiC coating on surface of power transmission and transformation equipment

A technology of power transmission and transformation equipment and coating, which is applied in the direction of coating, metal material coating process, solid-state diffusion coating, etc., can solve problems such as corrosion, corrosion deterioration, rust spots, etc., and achieve controllable process parameters and excellent oxidation resistance , Improve the effect of wear resistance

Pending Publication Date: 2021-10-22
ELECTRIC POWER SCI & RES INST OF STATE GRID TIANJIN ELECTRIC POWER CO +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the inspection, it was found that the galvanized metal parts in the same service environment had corrosion and deterioration in different service periods. Some galvanized metal parts had rust spots on the galvanized layer and severe corrosion locally, which directly affected the Normal service of metal parts
Judging from the current service status of hot-dip galvanized metal components in power transmission and transformation systems, the hot-dip galvanized layer can no longer effectively guarantee the normal operation of power equipment for complex service environments

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A kind of MoSi used for Al modification on the surface of power transmission and transformation equipment 2 -The preparation method of SiC coating, comprises the following steps:

[0020] (1) Select carbon steel Q345 for pretreatment, cut the base material into 10mm×10mm×3mm samples, polish with #400, #600 sandpaper, and clean in alcohol solution for 15 minutes in ultrasonic to remove rust and oil.

[0021] (2) Place the carbon steel Q345 sample in a corundum crucible, and cover the substrate with a solid carburizing agent. The thickness of the carburizing agent is 50mm, and then place the crucible in a closed carburizing box and heat it to 950°C. Keep warm for 20h to obtain a carburized layer. The carburizing agent is composed of carbon powder and NaF powder, wherein the mass fraction of carbon powder is 30wt%.

[0022] (3) Composite powder is prepared, 20wt% Al powder, 30wt% Si powder, 10wt% Mo powder, 2wt% NaF powder, 38wt% Al 2 o 3 After the powders were mixed, ...

Embodiment 2

[0027] A kind of MoSi used for Al modification on the surface of power transmission and transformation equipment 2 -The preparation method of SiC coating, comprises the following steps:

[0028] (1) Select carbon steel Q345 for pretreatment, cut the base material into 10mm×10mm×3mm samples, polish with #400, #600 sandpaper, and clean in alcohol solution for 20 minutes in ultrasonic to remove rust and oil.

[0029] (2) Place the carbon steel Q345 sample in a corundum crucible, and cover the substrate with a solid carburizing agent, the thickness of the carburizing agent is 70mm, then place the crucible in a closed carburizing box, and heat it to 900 °C, Keep warm for 30 hours to obtain a carburized layer. The carburizing agent is composed of carbon powder and NaF powder, wherein the mass fraction of carbon powder is 40wt%.

[0030] (3) Composite powder is prepared, 16wt% Al powder, 40wt% Si powder, 24wt% Mo powder, 2wt% NaF powder, 18wt% Al 2 o 3 After the powders were mixe...

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Abstract

The invention relates to a preparation method of an Al-modified MoSi2-SiC coating on the surface of power transmission and transformation equipment, which comprises the following steps: placing a rust-removed and oil-removed base material in a corundum crucible, coating the base material with a solid carburizing agent, then placing the crucible in a closed carburizing box, heating to 900-950 DEG C, and keeping the temperature for 24-30 hours to obtain a carburized layer; placing a treated sample in the crucible, burying with composite powder which is prepared from 5-20wt% of Al powder, 10-40wt% of Si powder, 5-30wt% of Mo powder, 2-8wt% of NaF powder and the balance of Al2O3 powder, transferring the crucible into a furnace, filling a hearth with protective gas Ar, heating to 900-1000 DEG C, and keeping the temperature for 1-5 hours to obtain the Al-modified MoSi2-SiC coating. The carburized layer prepared through the carburizing process can improve the abrasion resistance of a base body; and the Al modified MoSi2-SiC coating prepared by adopting the embedding infiltration has excellent oxidation resistance and corrosion resistance.

Description

technical field [0001] The invention belongs to the field of power transmission and transformation equipment, and relates to coatings, in particular to a MoSi coating used for Al modification on the surface of power transmission and transformation equipment. 2 - SiC coating and preparation method. Background technique [0002] In the power transmission and transformation system, a large number of metal parts such as overhead ground wires, insulators, fittings, switch switches, pole towers, etc. are used as the anti-corrosion layer, which provides an important guarantee for the service safety of these metal parts. During the inspection, it was found that the galvanized metal parts in the same service environment had corrosion and deterioration in different service periods. The galvanized layer on the surface of some galvanized metal parts had rust spots and severe corrosion locally, which directly affected the Normal service of metal parts. Judging from the current service ...

Claims

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Application Information

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IPC IPC(8): C23C12/00C22C29/00
CPCC23C12/00C22C29/00
Inventor 齐文艳管森森叶芳李田傅思伟甘智勇张露孟庆霖温力陈韶瑜
Owner ELECTRIC POWER SCI & RES INST OF STATE GRID TIANJIN ELECTRIC POWER CO