Method for preparing titanium diboride and titanium carbide enhanced iron-based wear resistant composite paint

A technology of titanium diboride and composite coating, applied in coating, metal material coating technology and other directions, can solve the problems of difficult control of coating processing accuracy, single-phase ceramic accumulation and growth, and low coating bonding strength, etc. Achieve easy automation, reduce rapid accumulation and growth, and small heat affected zone

Inactive Publication Date: 2011-10-26
SHANDONG ELECTRIC POWER RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The usual methods of preparing titanium diboride and titanium carbide reinforced coatings are thermal spraying, induction cladding, surface melting and casting, etc., but these methods often have the disadvantages of low coating bonding strength, non-dense coating, and difficult control of thickness.
For example, Shipway et al. prepared TiB by supersonic flame spraying. 2 , TiC joint strengthening coating, but the coating thickness is thin and the density is low
[0004] Patent CN101037771A discloses "a preparation of TiC-TiB 2 Nano-micro composite ceramic coating method", which prepared TiC-TiB by laser cladding ceramic powder precursor 2 Ceramic coating, but this preparation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Polish the surface of Q235 steel plates with length, width and height of 50mm, 30mm and 10mm respectively with sandpaper and clean with acetone. Iron powder, ferro-titanium powder, ferroboron powder and graphite powder are mixed, and the mass fraction of each element in the mixed powder is 35.5% Ti, 7.36% B, 52.14% Fe, 5% C. The mixed powder is mixed evenly by a mixer and then mixed with water glass to form a paste. The mass ratio of water glass to mixed powder is 1:6. Naturally dry at room temperature for 5 hours. Using CO 2 The gas laser produces laser irradiation to melt the preset powder and part of the low-carbon steel substrate. The power used is 2500W, the scanning speed is 5mm / s, the spot diameter is 3mm, the protective gas flow rate is 10L / min, and the overlap rate is 30%. The thickness of the titanium diboride and titanium carbide reinforced iron-based composite coating is about 1.5 mm. The microhardness value of the coating is as high as HV620, and the rin...

Embodiment 2

[0021] The surface of the Q235 steel plate whose length, width and height are 50mm, 30mm and 10mm respectively is polished with sandpaper and cleaned with acetone. Mix iron powder, titanium powder, B4C powder, Cr powder, Si powder, and Ni powder with a mixer, and the mass fraction of each element is: 28.4% Ti, 7.83% B, 40.06% Fe, 2.71% C, 10 %Cr, 8%Ni, 3%Si. Mix it with water glass to make a paste, the mass ratio of water glass to preset powder is 1:8, preset on the above-mentioned low carbon steel, and the thickness of the preset layer is 1mm. Dry naturally at room temperature for 5 hours. Using CO 2 The gas laser produces laser radiation to melt the preset powder and some low-carbon steel substrates. The power used is 2500W, the scanning speed is 5mm / s, the spot diameter is 3mm, the protective gas flow rate is 10L / min, and the overlap rate is 30%. The obtained titanium diboride and titanium carbide reinforced iron-based composite coating has a thickness of about 1.5 mm. ...

Embodiment 3

[0023] The surface of the Q235 steel plate whose length, width and height are 50mm, 30mm and 10mm respectively is polished with sandpaper and cleaned with acetone. Iron powder, ferro-titanium powder, titanium powder, B4C powder, Cr powder, Si powder, Ni powder, Y 2 o 3 powder, using a mixer to mix evenly, wherein the mass fraction of each element is: 33.8% Ti, 10.17% B, 28.7% Fe, 2.83% C, 13% Cr, 7% Ni, 3.5% Si, 1% Y 2 o 3 Mix it with water glass to make a paste, the mass ratio of water glass to preset powder is 1:8, preset on the above-mentioned low carbon steel, and the thickness of the preset layer is 1mm. Dry naturally at room temperature for 5 hours. Using CO 2 The gas laser produces laser radiation to melt the preset powder and some low-carbon steel substrates. The power used is 2500W, the scanning speed is 5mm / s, the spot diameter is 3mm, the protective gas flow rate is 10L / min, and the overlap rate is 30%. The obtained titanium diboride and titanium carbide reinfo...

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Abstract

The invention relates to a method for preparing a titanium diboride and titanium carbide enhanced iron-based wear resistant composite paint. The method comprises the following steps: selecting a plurality of materials from iron powder, titanium powder, ferrotitanium powder, boron carbide powder, ferroboron powder and graphite powder to mix and form mixed powder containing the four elements of iron, titanium, boron and carbon, adding or not adding one or more of Ni, Cr, Si and Y2O3, placing the obtained powder in a ball mill or mixer to mix evenly; then using the mixed metal powder to form paste, coating the paste on the surface of carbon steel to form a layer of preset powder; and then adopting laser heating to irradiate the preset powder and ensure that the preset powder and partial carbon steel base material are molten to form a molten bath and perform metallurgical reaction. The preparation method is simple and the prepared composite paint has high hardness and excellent wear resistance.

Description

technical field [0001] The invention relates to a preparation method of a coating material. Background technique [0002] Titanium diboride and titanium carbide ceramics have high strength, high hardness, high elastic modulus (titanium diboride 29.4GPa, titanium carbide 28GPa), and good chemical stability, and are often used as reinforcements in wear-resistant composite materials Mutually. The preparation of titanium diboride and titanium carbide reinforced iron-based composite coatings can not only give full play to the characteristics of high wear resistance of the reinforcing phase, but also have high toughness and good crack resistance. At the same time, the composition of the iron-based alloy is close to that of the repaired steel-based component, the interface is firmly bonded, and the cost is low. [0003] The usual methods of preparing titanium diboride and titanium carbide reinforced coatings are thermal spraying, induction cladding, surface melting and casting, e...

Claims

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Application Information

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IPC IPC(8): C23C24/10
Inventor 杜宝帅王新洪邹增大张忠文李新梅
Owner SHANDONG ELECTRIC POWER RES INST
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