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Method for preparing metal-based composite coating on surface of stainless steel

A metal composite, stainless steel technology, applied in surface reaction electrolytic coating, metal material coating process, coating and other directions, can solve the problems of oxide layer peeling, uneven oxide layer, coating damage and so on

Active Publication Date: 2021-05-11
ZHONGBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the defects of laser cladding technology cannot prepare a completely uniform coating, this will also lead to the combination of laser cladding technology + micro-arc oxidation technology can only prepare an uneven oxide layer, which will cause more damage to the coating. Large damage makes it easier to be oxidized at high temperature, so that the oxide layer falls off and greatly reduces the high-temperature friction and wear performance of the coating. The present invention adds a high-current pulsed electron beam to the laser After cladding, the coating is subjected to surface alloying and element homogenization treatment, so that the entire coating surface is uniformly oxidized, thereby greatly improving the high-temperature friction and wear properties of the coating

Method used

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  • Method for preparing metal-based composite coating on surface of stainless steel
  • Method for preparing metal-based composite coating on surface of stainless steel
  • Method for preparing metal-based composite coating on surface of stainless steel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] The following examples are only preferred technical solutions of the present invention, and are not intended to limit the present invention in any way. Various modifications and variations of the present invention will occur to those skilled in the art. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

[0041] Example 1

[0042] Use 180#, 500#, and 1000# sandpaper to polish the 304 stainless steel substrate in turn to obtain a smooth 304 stainless steel substrate. Then put the 304 stainless steel substrate in a muffle furnace to preheat to 600 ° C and keep it for 1 hour to reduce the risk of damage caused by the substrate and the substrate. Coating cracking due to stresses caused by differences in thermal expansion between coating materials.

[0043] Dry the TiBCN powder in a vacuum oven at 80°C for 1 hour and keep it for...

Embodiment 2

[0056] Use 180#, 500#, and 1000# sandpaper to polish the 304 stainless steel substrate in turn to obtain a smooth 304 stainless steel substrate. Then put the 304 stainless steel substrate in a muffle furnace to preheat to 600 ° C and keep it for 1 hour to reduce the risk of damage caused by the substrate and the substrate. Coating cracking due to stresses caused by differences in thermal expansion between coating materials.

[0057] The TiBCN powder was dried in a vacuum oven at 100°C for 1 h and kept for 12 h to obtain a powder with better fluidity.

[0058] Using laser cladding technology, put the above TiBCN powder into the powder feeding tank, use argon as the carrier gas, carry the TiBCN powder to the laser nozzle, select the laser power of 1400W by coaxial powder feeding, and scan the speed of 5mm / s, the powder feeding rate is 280mg / s.

[0059] The prepared laser cladding coating was polished on a polishing machine with 180#, 500#, and 1000# sandpaper to remove the sur...

Embodiment 3

[0068] Use 180#, 500#, and 1000# sandpaper to polish the 304 stainless steel substrate in turn to obtain a smooth 304 stainless steel substrate. Then put the 304 stainless steel substrate in a muffle furnace to preheat to 600 ° C and keep it for 1 hour to reduce the risk of damage caused by the substrate and the substrate. Coating cracking due to stresses caused by differences in thermal expansion between coating materials.

[0069] Dry the TiBCN powder in a vacuum oven at 120°C for 1 hour and keep it for 12 hours to obtain

[0070] A powder with better flowability.

[0071] Using laser cladding technology, put the above TiBCN powder into the powder feeding tank, use argon as the carrier gas, carry the TiBCN powder to the laser nozzle, select the laser power of 1300W by coaxial powder feeding, and scan the speed of 6mm / s, powder feeding rate 250mg / s.

[0072] The prepared laser cladding coating was polished on a polishing machine with 180#, 500#, and 1000# sandpaper to remo...

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Abstract

The invention discloses a method for preparing a metal-based composite coating on the surface of stainless steel. The method comprises the steps that a TiBCN coating is prepared on the surface of stainless steel by a laser cladding technology in a synchronous powder feeding manner under the condition of inert gas, then, a laser cladding layer is uniformly polished by using a high-current pulsed electron beam technology, and finally, an aluminum oxide ceramic layer with uniform thickness is prepared by utilizing a micro-arc oxidation technology, so that high hardness and good wear resistance of the coating are realized.

Description

technical field [0001] The invention relates to a method for preparing a metal-based composite coating, in particular to a method for preparing a metal composite coating on the surface of stainless steel, and belongs to the technical field of surface modification. Background technique [0002] 304 stainless steel (304ss) is currently considered as one of the most important structural materials, widely used in various high-temperature environments due to their excellent mechanical properties and relatively high corrosion resistance. However, in order to extend their service life while maintaining high structural integrity, there is an increasing need for increased hardness, wear resistance and pitting resistance. [0003] So far, the preparation of functional coatings on the surface of 304 stainless steel is an effective method to improve its hardness, wear resistance and corrosion resistance. However, there are currently various materials and deposition methods for preparin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10C25D11/34
CPCC23C24/10C25D11/026C25D11/024C25D11/34
Inventor 李玉新陈博文刘思远聂金浩白培康赵占勇李忠华魏守征
Owner ZHONGBEI UNIV
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