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Preparation method of self-propagating synthesis TiB2 particle-reinforced copper-based surface composite material and composite copper casting

A technology of copper-based composite materials and surface composite materials, which is applied in the field of self-propagating synthesis of TiB2 particle-reinforced copper-based surface composite materials, can solve problems such as poor high-temperature performance, and achieve high density, good high-temperature wear resistance, and high-temperature good stability effect

Inactive Publication Date: 2013-09-18
JIANGSU LANRI ULTRA HARD MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] One object of the present invention is to provide a preparation technology for self-propagating synthesis of titanium diboride particle reinforced copper matrix composites on the surface of copper castings to solve the problems of poor high temperature performance of copper matrix composites, so that the prepared particle reinforced copper matrix The surface composite material has excellent comprehensive performance, which can significantly improve the high temperature wear resistance of composite copper castings, and at the same time, other metal bodies can be added appropriately to achieve better results in use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] A self-propagating method for synthesizing titanium diboride particle-reinforced copper matrix composites:

[0066] (1) Preparation of SHS powder: Take 320g of 50μm boron oxide powder, 220g of 30μm Ti powder, 260g of 40μm Al powder, 150g of 150μm Cu powder and 50g of borax according to the weight ratio, and mix them in a ball mill for 4 hours. Mix it well.

[0067] (2) Preparation of powder paste: Then add about 150ml of 5% polyvinyl alcohol aqueous solution, and stir in a mixer for 0.5 hour to make SHS powder paste.

[0068] (3) Loading powder paste: apply the mixed SHS powder paste on the working surface of the small foam plastic model of the blast furnace tuyere with a thickness of 2-4mm, and then dry it at a temperature of ≤40oC for 10 hours.

[0069] (4) Surface treatment: Hang the anti-sticking sand coating about 1mm thick on the model in step (3). Dry in an oven at ≤50oC for 24 hours before use.

[0070] (5) Pouring: Place the foamed plastic model of the tuyer...

Embodiment 2

[0073] A self-propagating method for synthesizing titanium diboride particle-reinforced copper matrix composites:

[0074] (1) Preparation of SHS powder: Take 300g of 100μm boron oxide powder, 220g of 40μm Ti powder, 220g of 20μm Al powder, 100g of 50μm Cu powder and 60g of borax according to the weight ratio, and mix them in a ball mill for 6 hours to make the powder Mix well.

[0075] (2) Preparation of powder paste: Add about 150ml of 4% polyvinyl alcohol aqueous solution to the above SHS powder, and stir in a mixer for 1 hour to make SHS powder paste.

[0076] (3) Loading powder paste: Spray the mixed SHS paint paste on the working surface of the polystyrene foam plastic model of the oxygen lance nozzle of the converter, with a thickness of 1-2mm, and then spray it at ≤30oC Dry in the drying room for 12 hours.

[0077] (4) Surface treatment: Hang anti-sticking sand paint about 1mm thick on the above model. Dry in an oven at ≤50oC for 18 hours before use.

[0078] (5) P...

Embodiment 3

[0081] A self-propagating method for synthesizing titanium diboride particle-reinforced copper matrix composites:

[0082] (1) Preparation of SHS powder: Take 300g of 80μm boron oxide powder, 220g of 50μm Ti powder, 220g of 90μm Al powder, 100g of 50μm Cu powder and 60g of borax according to the weight ratio, and mix them in a ball mill for 10 hours to make the powder Mix well.

[0083] (2) Preparation of powder paste: add about 150ml of 8% polyvinyl alcohol aqueous solution to the above SHS powder, and stir in a mixer for 1 hour to make SHS powder paste.

[0084] (3) Loading powder paste: Spray the mixed SHS paint paste on the working surface of the polystyrene foam plastic model of the oxygen lance nozzle of the converter, with a thickness of 1-2mm, and then spray it at ≤30oC Dry in the drying room for 12 hours.

[0085] (4) Surface treatment: Hang anti-sticking sand paint about 1mm thick on the above model. Dry in an oven at ≤50oC for 20 hours before use.

[0086] (5) P...

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Abstract

The invention relates to the technical field of metal-based composite material preparation and provides a preparation method of a self-propagating synthesis TiB2 particle-reinforced copper-based surface composite material and a composite copper casting. The preparation method comprises the following steps: mixing metal powder such as B2O3 powder, Ti powder, Al powder and Cu powder by a vacuum lost foam casting process and an SHS (Self-propagating High-temperature Synthesis) technology, adding a bonding agent for preparing into SHS powder paste, applying the SHS powder paste onto the work surface of the casting, producing a self-propagating synthesis reaction due to a high temperature of a copper metal solution in a pouring process to generate a TiB2 particle hard phase, and finally obtaining the surface self-propagating synthesis TiB2 particle-reinforced copper-based surface composite casting. The composite copper casting has the advantages that the compactness of a particle-reinforced alloy layer of the composite copper casting is high, and the composite copper casting is metallurgically bonded with a basic body and is high in strength, good in heat conductivity and high-temperature frictional wear resistance and suitable for various wear-resistant copper alloy parts working in high-temperature wear-resistant work conditions.

Description

technical field [0001] The invention belongs to the technical field of metal matrix composite material preparation, and particularly provides a self-propagating synthetic TiB 2 Preparation method of particle-reinforced copper-based surface composite. Background technique [0002] Particle-reinforced copper-based composites have better comprehensive properties than copper alloys. In particle-reinforced copper-based composites, fine particles have a load-bearing effect, which can reduce the plastic deformation of the sub-surface layer caused by friction pair scraping; at the same time, the high-temperature stability The addition of good particles can maintain the high temperature strength of the composite material, thus slowing down the softening of the wear surface material and reducing the adhesion tendency between the copper matrix and the friction pair. Thereby significantly improving the wear resistance of copper alloys [0003] Titanium diboride has a series of unique ...

Claims

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Application Information

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IPC IPC(8): B22D19/02B22D27/18
Inventor 不公告发明人
Owner JIANGSU LANRI ULTRA HARD MATERIAL
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