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A method of preparing boron-aluminum-magnesium ternary alloy coating by laser rapid remelting

A ternary alloy and remelting technology, applied in laser welding equipment, welding equipment, manufacturing tools, etc., can solve the problems of difficult to realize large-scale production and application of BAM, unsuitable for large-scale production, and high cost of preparation methods, and achieve easy Automated production, easy mass production, and good corrosion resistance

Inactive Publication Date: 2011-12-28
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above methods are not suitable for large-scale production, and the cost of the preparation method is high
[0004] The current preparation method has a high temperature of 1400 degrees for more than 24 hours. This method consumes a lot of energy and the conditions are harsh, so it is difficult to make a coating
The preparation of BAM by pulse current sintering method and pulse laser deposition method is difficult to realize the large-scale production and application of BAM
Therefore, in the existing technology, special equipment is required, the process is complicated, high energy consumption, high pollution, long time-consuming and other shortcomings

Method used

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  • A method of preparing boron-aluminum-magnesium ternary alloy coating by laser rapid remelting

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Effect test

Embodiment 1

[0021] Step 1: Separate the magnesium powder with a ball mill for 12 hours for use, manually grind the boron powder with a mortar for half an hour and grind the agglomerated blocks for use, and the aluminum powder is directly ready for use; the boron powder and magnesium powder , the particle diameter of aluminum powder is 5 μ m-10 μ m; Then boron powder, magnesium powder, aluminum powder are mixed respectively by the ratio of the mass percent of 70%: 10%: 12%;

[0022] Step 2: Mix the mixed powder and pure alcohol at a concentration ratio of 0.15 to 0.25g / ml, and stir continuously with a glass rod. While stirring, apply the mixed suspension evenly to the surface of No. 45 steel plate within one minute. Put it in a horizontal place to dry naturally; the steel plate needs to be polished and polished; the surface layer of the No. 45 steel plate is polished to silvery white with 80-grit sandpaper, then polished with 400-grit sandpaper, and finally polished with 1000-grit sandpaper...

Embodiment 2

[0025] Step 1: Separate the magnesium powder with a ball mill for 12 hours for use, manually grind the boron powder with a mortar for half an hour and grind the agglomerated blocks for use, and the aluminum powder is directly ready for use; the boron powder and magnesium powder , the particle diameter of aluminum powder is 5 μ m-10 μ m; Then boron powder, magnesium powder, aluminum powder are mixed respectively by the ratio of the mass percentage of 74.7%: 11.9%: 13.4%;

[0026] Step 2: Mix the mixed powder and pure alcohol at a concentration ratio of 0.15 to 0.25g / ml, and stir continuously with a glass rod. While stirring, apply the mixed suspension evenly to the surface of No. 45 steel plate within one minute. Put it in a horizontal place to dry naturally; the steel plate needs to be polished and polished; the surface layer of the No. 45 steel plate is polished to silvery white with 80-grit sandpaper, then polished with 400-grit sandpaper, and finally polished with 1000-grit ...

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Abstract

The invention relates to a method for preparing a boron-aluminum-magnesium ternary alloy coating by using laser rapid remelting. The laser cladding technology is used to obtain a surface alloy coating that is not limited by the solubility and the phase law determined by the equilibrium phase diagram under conventional conditions. layer, this alloy coating has high wear resistance, corrosion resistance and good electromagnetic and thermal properties. Compared with the traditional spraying process, the laser surface cladding technology has the following advantages: (1) The cladding layer has a dense structure, fine grains, and good oxidation resistance, corrosion resistance, and wear resistance; (2) ) The cladding layer has a good metallurgical bond with the substrate, and the bonding strength is high; (3) The heat input to the substrate is small, and the heat-affected zone of the substrate is small; (4) The dilution of the substrate to the coating (5) The laser surface cladding process can be precisely controlled, and the amount of subsequent machining is small; 6) Partial cladding treatment can be performed on the workpiece, the deformation of the treatment part is small, and the cladding process is well controllable.

Description

technical field [0001] The invention relates to a method for preparing a boron-aluminum-magnesium ternary alloy coating by using laser rapid remelting, and belongs to the fields of preparing functional materials and surface modification of metal materials. Background technique [0002] Boron-aluminum-magnesium alloy (BAM) was inadvertently prepared in 1999 by researchers at the U.S. Department of Energy's Ames Laboratory. It is smoother than PTFE and has a coefficient of friction of only 0.02. BAM has a complex low-symmetry 64-atom orthorhombic crystal structure, and there are vacancies in its structure, which is different from superhard materials with simple, high-symmetry crystal structures, mainly manifested in the following two Aspects: (1) By adding some substances such as Si and TiB2, the hardness of BAM can be increased, while the general superhard material is just the opposite; (2) BAM has good electrical conductivity. The unique properties of BAM provide favorable...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10B23K26/34
Inventor 耿兴国李峰卢福肖梦梦郭震远
Owner NORTHWESTERN POLYTECHNICAL UNIV
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