Preparation method of copper-based titanium carbide/aluminum oxide surface particle strengthening composite material

A technology of copper-based titanium carbide and surface particles, which is applied in the field of preparing copper-based TiC/Al2O3 composite ceramic surface particle-reinforced composite materials, can solve the problem of low volume fraction of the strengthening phase in the strengthening layer, low bonding strength between the strengthening layer and the matrix, and strengthening the Thin layer thickness and other problems, to achieve the effect of good bonding strength, clean bonding interface, and improved production efficiency

Inactive Publication Date: 2015-09-30
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the surface strengthening technologies mainly include electroplating, multi-component co-infiltration, thermal spraying, laser cladding, etc., but there are defects such as thinner thickness of the strengthening layer, low bonding strength between the strengthening layer and the matrix, and low volume fraction of strengthening phase in the strengthening layer. Improved workpiece performance
The method of preparing copper-based surface particle-reinforced composites by reactive cladding has not been reported yet

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] (1) Take by weighing 4kg of iron oxide powder with an average particle size of 20-25 μm, 4kg of aluminum powder of 35 μm, 4kg of titanium powder of 40-45 μm, and 1 kg of graphite powder of 40-45 μm and mix in a ball mill for 8 hours;

[0019] (2) Add 600g of polyvinyl alcohol aqueous solution of 3%wt in mixed powder, stir and make paste coating;

[0020] (3) Apply the paste paint on the surface of the EPS plastic foam mold or the designated position, the thickness of the coating layer is 6mm, and place it in an environment of 30°C to dry for 3 hours;

[0021] (4) The mold obtained in step 3 is hung with a 3mm thick quartz sand powder anti-sticking sand coating, and placed in a 40°C environment to dry for 4 hours;

[0022] (5) Buried sand for vibration molding, and vacuumed the sandbox with a vacuum degree of 0.07MPa. Melted pure copper liquid in an intermediate frequency induction furnace for casting. spreading reaction;

[0023] (6) The casting is buried in sand to c...

Embodiment 2

[0025] (1) Weigh 4kg of iron oxide powder with an average particle size of 20-25 μm, 4kg of aluminum powder of 35 μm, 4kg of titanium powder of 40-45 μm, and 1kg of graphite powder of 40-45 μm and mix them in a ball mill for 8 hours;

[0026] (2) placing the uniformly mixed powder in a steel mold, and pressing it under a pressure of 200MPa to obtain a prefabricated block;

[0027] (3) Bond the prefabricated block on the surface of the EPS plastic foam mold or the designated position, the thickness of the prefabricated block is 4mm, and place it in a 30°C environment to dry for 1 hour;

[0028] (4) The mold obtained in step 3 is hung with a 3mm thick quartz sand powder anti-sticking sand coating, and placed in a 40°C environment to dry for 4 hours;

[0029] (5) Buried sand for vibration molding, and vacuumed the sandbox with a vacuum degree of 0.07MPa. Melted brass liquid in an intermediate frequency induction furnace for casting. spreading reaction;

[0030] (6) The casting ...

Embodiment 3

[0032] (1) Take 4kg of copper oxide powder with an average particle size of 20-25 μm, 2kg of aluminum powder of 35 μm, 4kg of titanium powder of 40-45 μm, and 1 kg of graphite powder of 40-45 μm, and mix them in a ball mill for 6 hours;

[0033] (2) Add 500g of polyvinyl alcohol aqueous solution of 3%wt in mixed powder, stir and make paste coating;

[0034] (3) Bond the prefabricated block on the surface of the EPS plastic foam mold or the designated position, the thickness of the prefabricated block is 5mm, and place it in a 30°C environment to dry for 4 hours;

[0035] (4) The mold obtained in step 3 is hung with a 3mm thick quartz sand powder anti-sticking sand coating, and placed in a 40°C environment to dry for 4 hours;

[0036] (5) Buried sand for vibration molding, and vacuumed the sandbox with a vacuum degree of 0.07MPa. Melted aluminum bronze liquid in an intermediate frequency induction furnace for casting. spreading reaction;

[0037] (6) The casting is cooled by ...

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Abstract

The invention discloses a preparation method of a copper-based titanium carbide / aluminum oxide surface particle strengthening composite material, and belongs to the technical field of metal-based composite material preparation. The preparation method includes preparing surface strengthening layer powder, namely self-propagating reaction system powder; adding polyvinyl alcohol liquor, evenly stirring the surface strengthening layer powder and the liquor to obtain paste through mixing or obtain a precast block through pressing, applying or adhering the paste or precast block to the surface of an EPS (expandable polystyrene) plastic foam mold, spraying fireproof paint before drying, and performing copper liquid smelting and inter-sand casting to obtain the copper-based TiC / Al2O3 complex-phase ceramic surface particle strengthening composite material. The method has the advantages that a self-propagating reaction of the surface strengthening layer powder is initiated by casting heat, and a product is generated in situ, so that external pollution and inclusion are avoided, and mechanical and physical performance of a strengthened area is guaranteed; due to high heating temperature of the self-propagating reaction, the product is enabled to be a melt which is fused on the surface of metal, so that compactness of a strengthening coating as well as metallurgical bonding between the strengthening coating and a base body are guaranteed.

Description

technical field [0001] The invention belongs to the technical field of metal matrix composite material preparation, in particular to a method for preparing copper-based TiC / Al 2 o 3 A method for particle-reinforced composites on the surface of multiphase ceramics. technical background [0002] Due to their good thermal conductivity, electrical conductivity and plasticity, copper and copper alloys are widely used in actual production, such as small tuyeres, continuous casting molds, electrical contact materials, etc. Due to its low hardness and poor wear resistance, it leads to frequent replacement of workpieces or frequent maintenance of production lines, resulting in huge energy consumption and economic losses. At present, the main method to alleviate the impact wear of parts under severe working conditions is surface strengthening technology, which has the great advantage of low cost and high performance. [0003] At present, the surface strengthening technologies mainl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D19/02
Inventor 郭志猛石韬罗骥郝俊杰叶安平杨芳
Owner UNIV OF SCI & TECH BEIJING
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