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High hardness and low friction Cr/CrCN gradient coating technology applicable to surface of profiled reed

A gradient coating, special-shaped reed technology, applied in the surface coating modification, special-shaped reed surface high hardness, low friction coefficient Cr/CrCN gradient coating technology field, can solve the actual working conditions of special-shaped reed complex, special-shaped The complex shape of the reed, the change of the toughness and elasticity of the reed body, etc., can achieve the effect of harmonizing the structure and function of the coating body, good toughness, and reducing the coating stress.

Inactive Publication Date: 2009-12-23
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Due to the complex shape of the special-shaped reed and the large transition arc angle of the reed teeth, it is difficult to deposit a uniform hard coating on the surface, and it is also a difficult problem to improve the bonding performance of the stainless steel reed body and the coating; in addition, due to the thickness of the reed body itself If the thickness is less than 2mm, the deposition parameters such as deposition temperature, bias voltage, and the stress in the hard coating may cause the deformation of the reed or change the toughness and elasticity of the reed itself
In addition, the actual working conditions of special-shaped reeds are complex, and the damage modes include wear, impact fatigue, corrosion and stress corrosion, etc., and due to different stress conditions, the reflected damage parts and failure modes are quite different, so excellent performance can be obtained on its surface. The high hardness and wear-resistant coating is a thorny problem

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The invention adopts the self-developed JW-500 arc ion enhanced reaction magnetron sputtering apparatus;

[0037] The target materials used for the deposited Cr layer are 2 magnetron Cr targets and 1 column arc Cr target, both of which have a purity of 99.99%;

[0038] The target material used for the deposition of CrCN gradient coating is 2 magnetron Cr targets, 2 magnetron C targets, 1 column arc Cr target, and its purity is 99.99%;

[0039] The deposition pressure is maintained at 0.35Pa during the deposition process of the CrCN gradient coating.

[0040] The deposition temperature is maintained at 200° C. during the deposition of the CrCN gradient coating.

[0041] The deposition bias voltage in the process of depositing the CrCN gradient coating is further selected at -100V, and the coating effect is the best.

[0042] The initial sputtering power of the Cr target is 3.6KW, which is reduced by 0.5KW every ten minutes until it is reduced to 1KW.

[0043] The init...

Embodiment 2

[0059] During the process of depositing CrCN gradient coating, the sputtering bias has great influence on the composition, uniformity and structure of the coating. The pre-plating treatment of this example special-shaped reed Cr / CrCN gradient coating is identical with embodiment 1 step (1), just change degreaser composition and be sodium carbonate 250g / L, sodium citrate 50g / L, active agent 4g / L, Sodium phosphate 60g / L, cleaned with ultrasonic agitation for 40 minutes; Bias backsplash cleaning is the same as embodiment 1 step (2), when other unmentioned conditions and parameters are the same as embodiment 1, change when deposition gradient CrCN layer Deposition bias, if selected as -50V, -150V and -200V, can control the composition, structure and microstructure of the CrCN gradient coating, and then realize the hardness, toughness, friction and wear properties of the Cr / CrCN gradient coating It can be adjusted within a certain range to meet the needs of different product uses.

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Abstract

The invention disclose a high hardness and low friction coefficient Cr / CrCN gradient coating technology applicable to the surface of profiled reed for a high speed loom. The technology includes the steps of preplating, bias back wash cleaning and depositing Cr / CrCN wearproof gradient coating on the surface of the profiled reed with complex contour, large tip edge arc angle and small thickness. The Cr / CrCN gradient coating deposited by the invention has hardness as high as 2400HV and friction coefficient as low as 0.11, not only has high hardness and low friction coefficient but also has good coating uniformity and favourable toughness, and coordination of structure and function of the profiled reed top coating can be realized, thus effectively improving the properties and service life of the coating and the whole parts of the profiled reed base body.

Description

technical field [0001] The invention relates to a surface coating modification technology, in particular to a high-hardness and low friction coefficient Cr / CrCN gradient coating process for a special-shaped reed used in a high-speed air-jet loom, and belongs to the field of mechanical engineering. Background technique [0002] According to statistics, in 2008 my country's per capita fiber consumption rose from 7kg in 2001 to 15.5kg, and the total import and export trade volume of textiles and clothing exceeded 196 billion US dollars, of which the export value exceeded 170 billion US dollars, such as literature [Zhang Yiming, Yang Bing, Wang Zhiqiang, Huang Jiahui .Research and Discussion on Vapor Deposition of High Purity Cr on Shaped Reed Reed Teeth, Textile Equipment, 2008, 35(5): 418-420.]. Although China is a major exporter of textiles, limited by the development and production level of domestic textile machinery, the production capacity of high-end and high-quality texti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C14/35C23C14/16C23C14/02
Inventor 刘波汪渊杨吉军
Owner SICHUAN UNIV
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