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A kind of method for preparing wear-resistant coating by thermal spraying
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A wear-resistant coating, thermal spraying technology, applied in the direction of coating, metal material coating process, melt spraying, etc., can solve problems such as reducing overall performance and component wear, and achieve low friction coefficient and good wear resistance. Effect
Active Publication Date: 2019-08-02
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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[0003] For example, at present, most engines will experience obvious wear and tear after running for more than 5 years, which greatly reduces the overall performance. higher requirements
Method used
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Embodiment 1
[0021] Mix molybdenum powder and tantalum powder with a mass percentage purity of 99% at a ratio of 4:1, and perform mechanical alloying treatment through a ball mill to make most of the particle size within the range of 42-54 μm, and seal and store in time after completion;
[0022] Take a cylindrical No. 45 steel with a diameter of 24mm and a height of 8mm, derust the surface of the workpiece to be sprayed until the surface is smooth, then immerse in acetone for ultrasonic treatment for 50 minutes to degrease, and then take it out and seal it;
[0023] Sand blast the surface of No. 45 steel that needs to be sprayed. Use 24# brown corundum for sand blasting, and the sand blasting pressure is 0.25MPa.
[0024] Plasma spraying equipment is used, and the specific spraying parameters are as follows: spraying distance: 100 (mm); current: 420 (A); voltage: 157 (V); argon gas speed: 150L / min; hydrogen gas speed: 15L / min; : 30g / min.
[0025] The metal coating prepared by the method ...
Embodiment 2
[0027] Mix molybdenum powder and tantalum powder with a mass percentage purity of 99% in a ratio of 7:3, and perform mechanical alloying treatment through a ball mill to make most of the particle size within the range of 42-54 μm, and seal and store in time after completion;
[0028] Take a cylindrical No. 45 steel with a diameter of 24mm and a height of 8mm, derust the surface of the workpiece to be sprayed until the surface is smooth, then immerse in acetone for ultrasonic treatment for 40 minutes to degrease, and then take it out and seal it;
[0029] Sand blast the surface of No. 45 steel that needs to be sprayed. Use 24# brown corundum for sand blasting. The sand blasting pressure is 0.3MPa.
[0030] Plasma spraying equipment is used, and the specific spraying parameters are as follows: spraying distance: 100 (mm); current: 420 (A); voltage: 167 (V); argon gas speed: 150L / min; hydrogen gas speed: 20L / min; : 40g / min.
[0031] The metal coating prepared by the method has t...
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Abstract
The invention discloses a method for preparing an abrasion-resistant coating through thermal spraying. According to the method, by means of a plasma spraying technology, after mechanical alloying of two kinds of metal powder of molybdenum and tantalum, treatment is performed on the surface of a workpiece needing to be sprayed, then spraying is performed under the effects of argon and hydrogen, and preparation of the abrasion-resistant coating is achieved. The abrasion-resistant coating prepared through the method has the excellent comprehensive performance of being high in hardness, resistant to corrosion, low in friction and the like, and the service life of a mechanical part can be substantially prolonged.
Description
technical field [0001] The invention relates to a method for preparing a wear-resistant coating by thermal spraying, which belongs to the fields of thermal spraying technology, surface technology and the like. Background technique [0002] With the development of social science and technology and the increasingly extreme requirements for the operating environment of machinery in aviation, navigation, and industry, mechanical moving parts are facing serious friction and wear problems, so high-performance wear-resistant and corrosion-resistant coatings are required to provide protection. On the other hand, machinery in all walks of life is currently developing towards the direction of long life and high stability, and the performance requirements for equipment coatings are increasing day by day. However, the coating materials and technologies currently used were developed in the 1970s and 1980s, and cannot meet the requirements in terms of reliability, long life, and ultra-low...
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Patent Type & Authority Patents(China)
IPC IPC(8): C23C4/134C23C4/08C23C4/02
CPCC23C4/02C23C4/08
Inventor 梁爱民张俊彦张帆高凯雄牛博龙
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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