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Method for overlaying SiCp/Al composite material coating by melting pole inert-gas protective arc welding

A technology of inert gas and composite materials, applied in arc welding equipment, welding equipment, manufacturing tools, etc., can solve the problems of easy cracking and peeling of the coating, high cost, etc., achieve low equipment cost, easy operation, improve heat resistance and The effect of vibration resistance

Inactive Publication Date: 2011-07-06
HARBIN INST OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the coating layer is easy to crack and peel off and the cost is high in the laser cladding layer on the surface of the aluminum alloy at present; and provides a method for welding SiCp / Al composite material cladding by melting extremely inert gas shielded arc surfacing

Method used

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  • Method for overlaying SiCp/Al composite material coating by melting pole inert-gas protective arc welding

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specific Embodiment approach 1

[0008] Specific embodiment one: in the present embodiment, the method for overlay welding SiCp / Al composite material cladding by MIGA welding is carried out according to the following steps: one, the aluminum alloy surface oxide film is removed, then use ethanol or acetone Clean and dry again; 2. Remove the oxide film on the surface of the welding wire, then clean it with ethanol or acetone, and then dry it in the air. The welding wire is a solid welding wire, which is composed of 3.5% to 12% SiC and 1.0% to 5.0% Ti by weight. , 0 ~ 1.0% B, 5.0% ~ 9.0% Si, 0 ~ 2.0% fluoride, 0 ~ 2.0% chloride and the rest of the Al composition; three, by MIG shielded arc welding (see figure 1 ) deposit the welding wire on the surface of the aluminum alloy; that is, obtain the SiCp / Al composite material coating on the surface of the aluminum alloy, wherein the MIG arc welding process conditions of step 3: the current form is direct current, adopting the reverse polarity connection method, weldin...

specific Embodiment approach 2

[0010] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the welding wire described in step 2 is composed of 4% to 10% SiC, 2.0% to 4.0% Ti, 6.0% to 8.0% Si and the balance by weight. Al composition. Other steps and parameters are the same as in the first embodiment.

specific Embodiment approach 3

[0011] Embodiment 3: The difference between this embodiment and Embodiment 1 is that the welding wire in step 2 is composed of 5% to 9% SiC, 3% to 5.0% Ti, 0.1 to 1.0% B, 7.0% to 9.0% by weight. % Si and the balance Al composition. Other steps and parameters are the same as in the first embodiment.

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Abstract

The present invention discloses a method for overlaying a SiCp / Al composite material coating by melting pole inert-gas protective arc welding, which relates to a method for preparing a surface coating of a particulate reinforced aluminum-based composite material. The invention solves the problems of easy cracking and stripping of a coating layer and high cost of the current aluminum alloy surface laser melting coating. The SiCp / Al composite material coating is overlaid on the surface of aluminum alloy by adopting melting pole inert-gas protective arc welding. The melting coating has high bonding strength with the aluminum alloy, thereby preventing cracking and stripping. The method has the advantages of low cost and high efficiency.

Description

technical field [0001] The invention relates to a method for preparing the surface coating of particle-reinforced aluminum-based composite materials. Background technique [0002] The preparation of aluminum matrix composite coatings reinforced by ceramic particles on the surface of aluminum alloys is one of the hotspots in the field of surface engineering research. At present, there are various technologies for preparing surface ceramic particle-reinforced composite materials, such as laser cladding technology, plasma cladding technology, thermal spraying technology, and argon arc cladding technology. In recent years, with the development and industrial application of high-power lasers, laser cladding technology on aluminum alloy surfaces has received widespread attention at home and abroad, especially laser cladding ceramic particle-reinforced composite coatings can significantly improve the surface properties of aluminum alloys. However, due to the high chemical activity...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K9/173
Inventor 汤文博牛济泰关绍康李杏瑞陈永潘继民卢广玺田昊王典亮李冬青来忠红
Owner HARBIN INST OF TECH
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