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304 stainless steel coated with self-lubricating wear-resistant composite coating and preparation method of 304 stainless steel

A technology of 304 stainless steel and composite coating, which is applied in the direction of coating and metal material coating technology, can solve the problems that it is difficult to meet the actual needs, and does not consider improving the self-lubricating performance of 304 stainless steel, so as to improve the tribological performance. , the average hardness increases, and the effect of widening commercial applications

Active Publication Date: 2021-07-13
CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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  • Claims
  • Application Information

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Problems solved by technology

However, the coating material system and preparation method do not consider improving the self-lubricating properties of 304 stainless steel, and the coating cannot have good self-lubricating and wear-resistant properties in a wide temperature range, which is difficult to meet the actual needs of applications.

Method used

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  • 304 stainless steel coated with self-lubricating wear-resistant composite coating and preparation method of 304 stainless steel
  • 304 stainless steel coated with self-lubricating wear-resistant composite coating and preparation method of 304 stainless steel
  • 304 stainless steel coated with self-lubricating wear-resistant composite coating and preparation method of 304 stainless steel

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preparation example Construction

[0052] The preparation method of above-mentioned composite coating material, comprises the following steps:

[0053] S1. Put the above raw materials into a DECO-PBM-V-0.4L vertical planetary ball mill at a speed of 540r / min, ball mill for 2 hours to obtain an alloy powder mixture, and dry at 80°C for 2 hours;

[0054] S2, use 100 purpose SiC sandpaper to polish the 304 stainless steel substrate;

[0055] S3. Use LDM-8060 powder feeding laser to scan the surface of 304 stainless steel substrate by synchronous powder feeding method, and form a composite coating material on the surface of 304 stainless steel substrate; among them, the output power is 1.6kW, the spot diameter is 2mm, scanning The speed is 800mm / min, the powder feeding rate is 20g / min, the overlap rate is 50%, and the protective gas is argon.

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Abstract

The invention discloses 304 stainless steel coated with a self-lubricating wear-resistant composite coating and a preparation method of the 304 stainless steel. The stainless steel comprises the following components of Co, Cu, TiC, Cr7C3, Fe2C, Ti3SiC2 and 304 stainless steel. The composite coating material is obtained by carrying out a laser cladding process on raw materials, and the composite coating material comprises the following raw materials of metal cobalt, metal copper and Ti3SiC2. According to the composite coating, metal cobalt is used as a toughening phase in a coating system, so that the hardness, the wear resistance and the corrosion resistance of the composite coating are improved; ceramic particles such as TiC, Cr7C3 and Fe2C are formed by a ternary lubricant Ti3SiC2 in the cladding process, the defect that the hardness of the 304 stainless steel is low is overcome, and the self-lubricating property of the coating is improved; and Cu metal powder improves the wear-resisting and friction-reducing effects of the 304 stainless steel.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and in particular relates to a 304 stainless steel coated with a self-lubricating and wear-resistant composite coating and a preparation method thereof. Background technique [0002] 304 stainless steel has good corrosion resistance and oxidation resistance at room temperature, and is widely used in machinery manufacturing, petrochemical and other fields. However, the hardness of 304 stainless steel is relatively low (200-250HV), and its thermal stability and wear resistance are poor. Therefore, laser cladding technology is usually used on the outer surface of stainless steel to improve its wear resistance and friction reduction performance. At present, most of the wear-resistant composite coatings suitable for 304 stainless steel only have a single wear resistance, but lack friction compatibility for frictional counterparts, that is, lack of corresponding self-lubricating properties,...

Claims

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Application Information

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IPC IPC(8): C23C24/10C22C19/07C22C32/00
CPCC23C24/103C22C19/07C22C32/0052Y02P10/25
Inventor 刘秀波王港刘一帆祝杨孟元梁金
Owner CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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