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Coating method for carbon brake disk anti-oxidation coating

A technology for carbon brake discs and anti-oxidation, which is applied in coatings, devices for coating liquids on surfaces, and surface pretreatment, etc., which can solve the problems of high viscosity of coating precursor liquid at room temperature, difficult operation by workers, and coating treatment cycle Long and other problems, to achieve the effect of shortening the coating treatment cycle, shortening the production cycle, and shortening the processing cycle

Inactive Publication Date: 2018-09-21
XIAN AVIATION BRAKE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] (1) The viscosity of the coating precursor liquid is high at room temperature, the coating is uneven, and the operation is difficult for workers;
[0004] (2) The coating precursor liquid is easy to accumulate in rivet holes, indicator rod holes, etc. during the coating process, and solidifies into ceramics after the coating heat treatment is completed, resulting in the problem of out-of-tolerance assembly dimensions;
[0005] (3) The traditional coating process needs to repeat the process flow of painting-drying-heat treatment 2 to 3 times, and the coating treatment cycle is long

Method used

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  • Coating method for carbon brake disk anti-oxidation coating
  • Coating method for carbon brake disk anti-oxidation coating
  • Coating method for carbon brake disk anti-oxidation coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Embodiment 1: The present invention is applied to the early warning LS-108D brake disc, and a total of 75 workpieces in three batches are compared before and after the coating process is changed. The changed coating process: Pour the prepared carbon brake disc anti-oxidation coating into a beaker, put the beaker into a magnetic stirrer for heating and stirring, the holding temperature is 40°C, and the holding time is 15 minutes. Stir continuously. The results show that: the average painting time of a single workpiece is shortened from 10 minutes to 5 minutes, the coating treatment cycle is shortened from 10 working days to 7 working days, the rework rate is reduced from 37% to 8%, and the average anti-oxidation performance is not lower than that of traditional process, see image 3 .

Embodiment 2

[0022] Embodiment 2: The present invention is applied to the LS-129B brake disc of J10B, and a comparison is made of three batches of 84 workpieces before and after the coating process is changed. The changed coating process: Pour the prepared carbon brake disc anti-oxidation coating into a beaker, put the beaker into a magnetic stirrer for heating and stirring, the holding temperature is 60°C, and the holding time is 20 minutes. Stir continuously. The results show that the painting time of a single workpiece is shortened from 7min to 2min, the coating treatment cycle is shortened from 9 working days to 5 working days, the rework rate is reduced from 25% to 6%, and the average anti-oxidation performance is not lower than the traditional process , see Figure 4 .

Embodiment 3

[0023] Embodiment 3: The present invention is applied to the LS-158 brake disc of J-15, and a comparison is made of three batches of 198 workpieces before and after the coating process is changed. The changed coating process: Pour the prepared carbon brake disc anti-oxidation coating into a beaker, put the beaker into a magnetic stirrer for heating and stirring, the holding temperature is 50°C, and the holding time is 40 minutes. Stir continuously. The results show that the painting time of a single workpiece is shortened from 10 minutes to 4 minutes, the coating treatment cycle is shortened from 16 working days to 11 working days, the rework rate is reduced from 23% to 6%, and the average anti-oxidation performance is not lower than that of the traditional process , see Figure 5 .

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Abstract

The invention belongs to the technology of airplane brake disks and relates to a coating method for a carbon brake disk anti-oxidation coating. The coating method comprises the steps that firstly, a prepared carbon brake disk anti-oxidation coating precursor solution is poured into a container to be heated and stirred, the heat keeping temperature is larger than or equal to 40 DEG C, the temperature keeping time is 15-40 min, and stirring is continuously carried out in the whole coating process; secondly, carbon / carbon dowels matched with brake disk rivet holes and indication rod holes are prepared, and before the coating is painted, the dowels and a brake disk are subjected to non-mechanical riveting; thirdly, the non-friction face of the coating is coated with the coating precursor solution, drying is carried out after coating is completed, then coating and drying are carried out again, and finally high-temperature heat treatment is carried out; and fourthly, after coating treatmentis completed, the dowels are taken out one by one. According to the coating method, the coating treatment period can be shortened, the coating is coated more evenly, and the binding performance is better.

Description

technical field [0001] The invention belongs to the aircraft brake disc technology, and relates to a coating method of an anti-oxidation coating of a carbon brake disc. Background technique [0002] Carbon brake discs are widely used in aircraft and racing cars because of their excellent mechanical properties, thermophysical properties and friction and wear properties. In actual use, in order to solve the problem of oxidation failure of carbon brake discs, the non-friction surface of carbon brake discs must be coated with an anti-oxidation coating. However, the anti-oxidation coating has the following problems during the coating process: [0003] (1) The viscosity of the coating precursor liquid at room temperature is high, the coating is uneven, and the operation is difficult for workers; [0004] (2) The coating precursor liquid is easy to accumulate in rivet holes, indicator rod holes, etc. during the coating process, and solidifies into ceramics after the coating heat ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05D5/00B05D1/28B05D3/02B05D3/00B05D1/32B05C11/10
CPCB05C11/1007B05C11/1042B05D1/28B05D1/32B05D3/007B05D3/0254B05D5/00
Inventor 强琪任飒
Owner XIAN AVIATION BRAKE TECH
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