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Copper/graphite compound material and preparation method thereof

A composite material and manufacturing method technology, applied in metal material coating process, hot-dip plating process, coating, etc., can solve the problems of unsatisfactory dipping composite effect and high equipment, and achieve good friction and lubrication performance, high mechanical strength and The effect of toughness

Active Publication Date: 2011-08-10
AEROSPACE RES INST OF MATERIAL & PROCESSING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] For impregnating tin, antimony, babbitt alloy and other medium and low melting point metals, these methods are mostly feasible; but for impregnating high melting point metals such as copper and silver alloy, the requirements for equipment are higher, and the impregnation composite effect of the above methods is not ideal enough.

Method used

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  • Copper/graphite compound material and preparation method thereof
  • Copper/graphite compound material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The copper / graphite composite material of the present invention uses carbon graphite as the matrix material and tin bronze alloy as the impregnating metal.

[0024] Such as figure 1 As shown, the above-mentioned copper / graphite composite material manufacturing method is as follows:

[0025] (1) The carbonaceous graphite material block is processed according to the needs; then the tin bronze alloy is melted into a molten liquid in the heat treatment furnace, the carbonaceous graphite material block is immersed, and the copper sheath covering the graphite material block is formed after cooling. The used tin-bronze alloy composition includes 5.2% by mass of tin, and the rest is copper; the melting of the tin-bronze alloy is at a temperature of 1150°C for 12 minutes. The density of carbon graphite used is 1.50g / cm 3 , The open porosity is 22.9%, the Shore hardness is 55HS, and the compressive strength is 70MPa.

[0026] (2) Put the copper sheath obtained in step (1) into a hot i...

Embodiment 2

[0030] The copper / graphite composite material of the present invention uses carbon graphite as the matrix material and tin bronze alloy as the impregnating metal.

[0031] Such as figure 1 As shown, the manufacturing method of the above-mentioned copper / graphite composite material is as follows:

[0032] (1) The carbonaceous graphite material block is processed according to the needs; then the tin bronze alloy is melted into a molten liquid in the heat treatment furnace, the carbonaceous graphite material block is immersed, and the copper sheath covering the graphite material block is formed after cooling. The density of carbon graphite used is 1.60g / cm 3 , The open porosity is 18.9%, the Shore hardness is 55HS, and the compressive strength is 80MPa. The used tin-bronze alloy composition includes 3% by mass of tin, and the rest is copper; the tin-bronze alloy has a melting temperature of 1100°C and a heat preservation time of 20 minutes.

[0033] (2) Put the copper sheath obtained ...

Embodiment 3

[0037] The copper / graphite composite material of the present invention uses carbon graphite as the matrix material and tin bronze alloy as the impregnating metal.

[0038] Such as figure 1 As shown, the above-mentioned copper / graphite composite material manufacturing method is as follows:

[0039] (1) The carbonaceous graphite material block is processed according to the needs; then the tin bronze alloy is melted into a molten liquid in the heat treatment furnace, the carbonaceous graphite material block is immersed, and the copper sheath covering the graphite material block is formed after cooling. The density of carbon graphite used is 1.60g / cm 3 , The open porosity is 18.9%, the Shore hardness is 55HS, and the compressive strength is 80MPa. The used tin-bronze alloy composition includes 5.2% by mass of tin, and the rest is copper. The tin-bronze alloy is melted at a temperature of 1200°C in the heat treatment furnace for 15 minutes.

[0040] (2) The copper sheath obtained in st...

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Abstract

The invention relates to a copper / graphite compound material and a preparation method thereof. In the compound material, carbon graphite is used as a substrate material, and a tin bronze alloy is used as a dipping metal. The preparation method comprises the following steps: (1) melting the tin bronze alloy to meltwater in a heat treatment furnace, immersing carbon graphite material blocks, and cooling so as to form a copper clad wrap coated by the graphite material blocks; (2) putting the copper clad wrap obtained in the step (1) in a hot isostatic press for hot isostatic press dipping at the temperature of 1100-1300 DEG C under the pressure of 60-80MPa at the atmosphere of argon, carrying out thermal insulation and pressure preservation for 60-120 minutes, and then carrying out belt pressure cooling; and (3) taking out the copper clad wrap obtained in the step (2) and then dissecting the copper clad wrap by using a machining method. The copper / graphite compound material is applied to machinery motive seal or bearings with high parameters (the temperature changes between minus 253 to 350 DEG C and the rotate speed is over 10000 rpm).

Description

Technical field [0001] The invention relates to a copper / graphite composite material and a manufacturing method thereof. The prepared copper-impregnated graphite is used for mechanical dynamic seals or bearings. Background technique [0002] Silver-impregnated graphite and copper-impregnated graphite are the highest mechanical properties in mechanical carbon graphite, and are generally used for high-parameter dynamic sealing conditions. According to reports, the RL-10-A hydrogen-oxygen engine in the United States uses immersion silver graphite (P5Ag) produced by Pure Carbon as a dynamic sealing material under liquid hydrogen and gas hydrogen conditions. According to investigations, PureCarbon has been merged into Morgan Group. P5Ag is graphite for military use in the United States (Western), which is difficult for my country to obtain. The dynamic seal of a certain type of hydrogen-oxygen engine turbo pump in our country is characterized by ultra-low temperature medium of liquid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C2/04C23C2/26
Inventor 唐正华郑恩启张葆霞杨村林姜召阳
Owner AEROSPACE RES INST OF MATERIAL & PROCESSING TECH
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