Carbonide / iron-base alloy composite coating and its reaction brass coating technology

An iron-based alloy and composite coating technology, which is applied in the direction of metal material coating process, coating, superimposed layer plating, etc., can solve the problem of easy pollution of ceramic/metal bonding interface, insufficient stability of coating performance, brazing coating, etc. Problems such as high material cost, to achieve the effect of high hardness, good corrosion resistance and low material cost

Inactive Publication Date: 2007-06-20
UNIV OF SCI & TECH BEIJING
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Problems solved by technology

[0003] In addition, when using the existing brazing technology to prepare ceramic / metal composite coatings, the brazing alloy as the bonding phase and the ceramic phase as the hard phase in the brazing material are pre-synthesized, and the cost of the brazing material is high. The ceramic phase in the coating is coarse and unevenly distributed, the ceramic / metal bonding interface is easily polluted, and the coating performance is not stable enough

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  • Carbonide / iron-base alloy composite coating and its reaction brass coating technology
  • Carbonide / iron-base alloy composite coating and its reaction brass coating technology

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Embodiment Construction

[0022] The present invention adopts above-mentioned reactive brazing process, with the industrial iron powder of chemical composition shown in table 1, titanium iron powder, Mo powder, Ni powder, colloidal graphite, boron iron powder, chromium iron powder and Si powder etc. as raw material powder, according to According to the composition ratio in Table 2, the (titanium carbide + chromium carbide) / iron-based alloy composite coating was prepared by reactive brazing on the surface of ordinary low-carbon steel.

[0023] The specific process steps are as follows:

[0024] 1. The material powder is mixed according to the composition ratio, wet milled on a ball mill for 24 hours, the ball-to-material ratio is 4:1, the ball milling speed is 120r.p.m, the ball milling medium is alcohol, and the average particle size of the powder obtained after ball milling is 6-7μm;

[0025] 2. The mixed powder after ball milling is dried in a drying box, the drying temperature is 50°C, and the dryin...

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Abstract

The present invention is one kind of composite (titanium carbide+chromium carbid) / ferroalloy coating and its reaction coating process, and belongs to the field of composite ceramic / metal coating. Industry Ti-Fe powder, Cr-Fe powder, B-Fe powder, Fe powder, etc. as main material, alcohol and organic adhesive are mixed to form slurry; the slurry is sprayed or painted onto the surface of base body; and through in-situ reaction and alloying under vacuum condition and at certain temperature, composite coating with hard phase of titanium carbide and chromium carbide and base phase of ferroalloy is formed after lowering the temperature. The present invention has low cost of forming the composite coating, and the composite coating has high heat resistance, high oxidation resistance, high corrosion resistance, high antiwear, etc. and may be used widely in metallurgy, thermal power generation and other fields.

Description

technical field [0001] The invention belongs to the technical field of preparation of ceramic / metal composite coatings, in particular to a (titanium carbide+chromium carbide) / iron coating with titanium carbide and chromium carbide as the hard phase and an iron-based alloy as the matrix phase (bonding phase). Base alloy composite coating and its reactive brazing process. Background technique [0002] Brazing coating technology is a material surface processing technology that uses the wetting and spreading of liquid solder alloy on the base metal to form a coating with special properties on the surface of the base. Metal coatings with specific properties can be prepared by using brazing technology, and ceramics / metals can be conveniently prepared by using mixed powders of ceramics (such as carbides, borides, oxides, etc.) and metals (or alloys) as brazing materials. Composite wear-resistant coating. Compared with the traditional coating technology, the braze coating technolo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C28/00C23C24/00C23C30/00
Inventor 黄继华裴新军张建纲
Owner UNIV OF SCI & TECH BEIJING
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