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A kind of metal surface modification method

A metal surface modification technology, applied in metal material coating process, fusion spraying, coating, etc., can solve the problem of low energy conversion efficiency and achieve the effect of saving resources and energy

Inactive Publication Date: 2011-12-07
SHANGHAI UNIV OF ENG SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the energy conversion efficiency is inferior to electric spark and electron beam

Method used

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  • A kind of metal surface modification method
  • A kind of metal surface modification method

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Effect test

Embodiment 1

[0027] A metal surface modification method, the metal surface is modified by surface texturing-powder spraying-laser remelting technology, comprising the following steps:

[0028] Texturize the treated metal surface with electron beams in vacuum to form tiny texturized pits with a diameter of 0.4mm and a depth of 0.2mm. The alloy powder is sprayed into the pits on the metal surface to be treated, the inert gas used for spraying and blowing is argon, its purity is 99.99%, the Co-based alloy powder is Stellite 6, and its chemical composition is shown in Table 1, and then the plasma arc is used to The blowing force mixes the molten base metal and nano-Co-based alloy powder evenly to form a dense and highly bonded melt-sprayed coating, and finally uses CO 2 The laser performs a single laser scan on the melt-sprayed coating, wherein the power is 2.0kW, the scanning speed is 2.0mm / s, and the spot diameter is 1.2mm, that is, the processed metal is obtained.

Embodiment 2

[0030] A metal surface modification method, the metal surface is modified by surface texturing-powder spraying-laser remelting technology, comprising the following steps:

[0031] Texturize the treated metal surface with electron beams in vacuum to form tiny texturized pits with a diameter of 0.2mm and a depth of 0.2mm. The powder is sprayed into the pits on the metal surface to be treated. The Co-based alloy powder is HMSP2528, and its chemical composition is shown in Table 1. The inert gas used for spraying and blowing is helium, and its purity is 99.99%. Mix the molten base metal and nano-Co-based alloy powder evenly to form a dense and high-strength melt-sprayed coating, and finally use CO 2 The laser performs a single laser scan on the melt-sprayed coating, wherein the power is 5.0kW, the scanning speed is 2.0mm / s, and the ratio of spot to diameter is 4.0mm, that is, the processed metal is obtained.

Embodiment 3

[0033] A metal surface modification method, the metal surface is modified by surface texturing-powder spraying-laser remelting technology, comprising the following steps:

[0034] Texturize the treated metal surface with electron beams in vacuum to form tiny texturized pits with a diameter of 0.3 mm and a depth of 0.1 mm. At the same time, nano-Co The base alloy powder is sprayed into the pits on the metal surface to be treated. The Co base alloy powder is HMSP2528, and its chemical composition is shown in Table 1. The inert gas used for spraying and blowing is helium, and its purity is 99.99%. The blowing force mixes the molten base metal and Co-based alloy powder evenly to form a dense and highly bonded melt-sprayed coating, and finally uses CO 2 The laser performs a single laser scan on the melt-sprayed coating, wherein the power is 4.0kW, the scanning speed is 15.0mm / s, and the ratio of spot to diameter is 4.0mm, that is, the processed metal is obtained.

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Abstract

The invention relates to a metal surface modification method. The invention first obtains a textured surface with a certain surface roughness value on the surface of a material by an electron beam texturing method, forms uniform tiny pits, and increases the bonding strength of the interface; then uses plasma The spraying process uses Co-based alloy or Ni-based alloy powder as the material to form a coating; finally, laser remelting technology is used to remelt the coating surface to improve the surface structure of the coating and improve the surface performance. Compared with the existing technology, this process can realize high temperature resistance, corrosion resistance, oxidation resistance, and fatigue resistance, and has high bonding strength, and the coating structure is uniform and compact, thereby greatly broadening the application range.

Description

technical field [0001] The invention relates to a method for surface treatment, in particular to a method for modifying the metal surface by adopting surface roughening-powder spraying-laser remelting technology. Background technique [0002] Electron beam texturing means that the high-energy electron beam is accelerated to about 1 / 3 of the speed of light in the electron gun, focused, projected on the surface of the material to be modified, collides with the material to be modified and releases energy in the form of heat. At a high enough temperature, the portion of the material that meets the electron beam melts and partially vaporizes, and the resulting vapor pressure ejects the molten material explosively, forming pits. By adjusting the accelerating electric field voltage, electron beam power, pulse frequency and deflecting the electron beam, a textured surface with a certain surface roughness value can be obtained on the surface of the material to be modified. [0003] ...

Claims

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Application Information

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IPC IPC(8): C23C4/08C23C4/02C23C24/10C23C4/129C23C4/131C23C4/134
Inventor 杨尚磊林庆琳孙明杰盖永刚
Owner SHANGHAI UNIV OF ENG SCI
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