Method for repairing size of casing spigot by supersonically spraying NiCrFeMn coating

A technology of supersonic spraying and repairing machine, which is applied in the field of repairing parts size, which can solve the problems of complicated repairing process, fast rotation speed and high difficulty, and achieve the effect of excellent coating performance, high flame flow speed and improved stress state

Inactive Publication Date: 2018-06-29
新锐咨询(辽宁)有限公司
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  • Application Information

AI Technical Summary

Problems solved by technology

For high-speed rotating parts, due to the large deformation after use, fast rotation speed, and small size of the worn part, the requirements for the bonding strength, surface roughness, and stress state of the size repair coating are relatively high, and the repair process is complicated. High difficulty

Method used

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Examples

Experimental program
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Effect test

Embodiment Construction

[0014] A method for supersonic spraying NiCrFeMn coating repair casing notch size, comprises the steps:

[0015] Step 1: Carry out sand blasting treatment on the mouth of the casing, using steel grit, and the shot peening intensity is 0.010N;

[0016] Step 2: Degrease the casing seam, wipe the casing seam with gasoline to remove oil and debris;

[0017] Step 3: Protect the part of the casing mouth that does not need to be repaired by spraying before sand blasting, and use protective tape to protect the non-spraying area of ​​the casing seam;

[0018] Step 4: Sand blow the area where the casing seam needs to be repaired, using 60-mesh alumina sand, and the sand blowing pressure is 0.2MPa;

[0019] Step 5: Spray NiCrFeMn coating at supersonic speed on the area where the size of the casing seam needs to be repaired. The specific parameters are kerosene flow rate of 3.5L / min, oxygen flow rate of 800L / min, powder feeding rate of 80g / min, and spraying distance of 240mm , the spray...

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Abstract

The invention relates to a method for repairing the size of a part, in particular to a method for repairing the size of a casing spigot by supersonically spraying a NiCrFeMn coating. The method comprises the following steps of 1, carrying out sand blowing treatment on the casing spigot; 2, performing oil removal treatment on the casing spigot; 3, carrying out protection on the part, which does notneed to be subjected to spraying repair, of the casing spigot before sand blowing; 4, carrying out sand blowing treatment on the area, which needs to be repaired in size, of the casing spigot, wherein 50-60 mesh magnesia sand is adopted, and sand blowing pressure is 0.2-0.5 MPa; and 5, supersonically spraying the NiCrFeMn coating on the area, which needs to be repaired, of the casing spigot, wherein the specific parameters are as follows that a kerosene flow rate is 2.5-5.5 L / min, an oxygen flow rate is 800-1200 L / min, a powder feeding rate is 75-80 g / min, spraying distance ranges from 120 mmto 240 mm and a spraying angle ranges from 60 degrees to 65 degrees. According to the method, a repaired part meets the assembling requirements, part reproduction cost is saved, and the production cost is reduced.

Description

technical field [0001] The invention relates to a method for repairing the size of a part, in particular to a method for repairing the size of the notch of a casing by supersonic spraying of a NiCrFeMn coating. Background technique [0002] The contact positions of static parts such as the engine casing or the stop of the rotating parts such as disc shafts are out of tolerance due to the grinding of the parts during use, resulting in the scrapping of the parts. In order to meet the needs of continued use of engine parts and reduce production costs, it is necessary to repair the size of the worn parts to ensure the assembly size of parts. For high-speed rotating parts, due to the large deformation after use, fast rotation speed, and small size of the worn part, the requirements for the bonding strength, surface roughness, and stress state of the size repair coating are relatively high, and the repair process is complicated. High difficulty. Contents of the invention [00...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C4/129C23C4/08C23C4/02
CPCC23C4/08C23C4/02
Inventor 曹玉坤
Owner 新锐咨询(辽宁)有限公司
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