High corrosion resisting and high wearable non-crystalline iron based nano crystal cost for plasma spraying and preparation method

An iron-based amorphous and plasma technology, applied in the direction of coating, metal material coating process, etc., to achieve excellent comprehensive performance of corrosion resistance and wear resistance, and improve the effect of cooling speed

Inactive Publication Date: 2005-10-26
UNIV OF SCI & TECH BEIJING
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Problems solved by technology

[0009] The present invention aims at the problems existing in the preparation of a single amorphous coating or nanostructure coating by thermal spraying technology in the past, and proposes to use amorphous alloy powder as the spraying powder, and use the atmospheric plas

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  • High corrosion resisting and high wearable non-crystalline iron based nano crystal cost for plasma spraying and preparation method
  • High corrosion resisting and high wearable non-crystalline iron based nano crystal cost for plasma spraying and preparation method
  • High corrosion resisting and high wearable non-crystalline iron based nano crystal cost for plasma spraying and preparation method

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[0017] The composition of the selected iron-based multi-element amorphous alloy powder is calculated by weight percentage: 0.9%wtC, 3.8%wtSi, 4.1%wtB, 6.5%wtCr, 11.5%wtW, 6.7%wtMo, 4.5% %wtNi, 0.2%wt Y, the rest is Fe, and the particle size of the powder ranges from 160 mesh to 400 mesh. The coating was prepared on the 0Cr13Ni5Mo stainless steel substrate by plasma spraying. The plasma spraying parameters were: arc voltage 60V, arc current 550A, main gas (Ar gas) 60L / min, auxiliary gas (H 2 Gas) 30L / min, powder feeding speed 45g / min, spraying distance 120mm. During the spraying process, the substrate is cooled by air blowing method, and the flow rate of the cooling gas is 300 L / min.

[0018] Crystal structure of spray powders and coatings

[0019] figure 1 It is the X-ray diffraction pattern of the iron-based spray powder and the corresponding coating. It can be seen from the figure that the spray powder is a typical amorphous powder, and the coating contains crystalline su...

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Abstract

Preparation of iron base amorphous nanocrystalline alloy coatings by plasma spraying which is wearable and anti-corrosive relates to iron base alloy coatings by plasma spraying, especially for the preparation of amorphous and nanocrystalline alloy coatings. The present invention aims at the problem of amorphous alloy coatings and nanocrystalline alloy coatings by thermal spraying. We use iron base multi- elements amorphous alloy as the coatings. We cool the substrate by carrying water or top injection method in spraying. The method can accelerate the cooling. The iron base amorphous alloy powder deposits on substrate, so we can get amorphous and nanocrystalline alloy coatings which contains the structure of amorphous and nanocrystalline. The coatings have the wearable and anti-corrosive capability.

Description

technical field [0001] The invention relates to plasma spraying iron-based alloy coating, in particular to the preparation of amorphous nanocrystalline composite coating. Background technique [0002] Amorphous materials and nanocrystalline materials have more unique and excellent properties than traditional materials, and are promising new materials. However, in practice, until now, these materials have not been widely used. The main factor is that their preparation process is difficult to control. In practice, it is difficult to prepare bulk amorphous and nanocrystalline materials, and their applications are mainly limited to thin films. On low-dimensional shapes such as ribbons, filaments, and powders. Relatively speaking, the preparation process of amorphous and nanocrystalline coatings is relatively easy to realize. Among many methods of preparing coatings, thermal spraying technology is a very competitive technology, and it is also a very promising technology. In the...

Claims

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Application Information

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IPC IPC(8): C23C24/00
Inventor 樊自拴孙冬柏孟惠民俞宏英王旭东
Owner UNIV OF SCI & TECH BEIJING
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