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Foaming silican carbide ceramic strengthening copper base composite abrasive sheet and preparation process thereof

A technology of copper-based composite materials and foamed silicon carbide, applied in the direction of friction linings, mechanical equipment, etc., can solve the problem of inability to effectively suppress the high-temperature deformation and adhesive wear of friction linings, the limitation of the improvement range of heat resistance of friction linings, and the heat resistance of friction linings. The problems such as the improvement limit of the machine can be solved, and the effects of considerable economic and social benefits, low wear rate and reduced wheel pressure can be achieved.

Inactive Publication Date: 2007-07-18
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the 1-3 connection relationship between the reinforcing phase and the matrix in this type of composite material, the reinforcing particles dispersed in the copper alloy matrix cannot effectively suppress the high-temperature deformation and adhesive wear of the friction plate caused by a large amount of frictional heat, making the friction plate resistant. The improvement of thermal properties is limited; even if the surface of the friction plate is functionalized (such as ceramics), the surface resistance to adhesive wear and thermal deformation can be significantly improved, but the interlayer thermal stress caused by a large amount of frictional heat will still cause The overall deformation and damage of the friction plate will limit the improvement of heat resistance

Method used

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  • Foaming silican carbide ceramic strengthening copper base composite abrasive sheet and preparation process thereof
  • Foaming silican carbide ceramic strengthening copper base composite abrasive sheet and preparation process thereof
  • Foaming silican carbide ceramic strengthening copper base composite abrasive sheet and preparation process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] First prepare foamed silicon carbide ceramics according to the method provided by the patent application number 03134039.3. The skeleton of the foamed silicon carbide ceramics is shown in Figure 3a. The size of the foamed silicon carbide ceramics is: a ring with an outer diameter of Φ85mm, an inner diameter of Φ75mm, and a thickness of 3mm. On a 45# steel ring with a diameter of Φ97mm, an inner diameter of Φ75mm, and a thickness of 10mm, heat it to 300°C and put it into a mold of Φ100mm.

[0053] Using the die-casting method, heat the iron brass Hfe59-1-1 to the melting point temperature (901°C) above 100°C, press it into the foamed silicon carbide ceramic skeleton with a pressure of 50MPa, and hold the pressure for 20 seconds. Size, you can get foam silicon carbide ceramic skeleton integrally reinforced copper matrix composite friction plate (see Figure 3c). The friction plate has the characteristics of good heat resistance, excellent friction performance, high mechan...

Embodiment 2

[0055] The difference from Example 1 is:

[0056] First prepare foamed silicon carbide ceramics according to the method provided by the patent application number 03134039.3. Among them, the size of the foamed silicon carbide ceramics is: a ring with an outer diameter of Φ90, an inner diameter of Φ75, and a thickness of 3mm. The mesh size is 0.2mm, and the volume fraction is 20%. 10mm 65 manganese steel ring, heated to 500°C and placed in a Φ100 mold.

[0057] Using the die-casting method, the silicon brass Hsi80-3 is heated to a melting point temperature (900°C) of 150°C or higher, the pressure is 80MPa, the holding time is 30 seconds, pressed into the foamed silicon carbide ceramic skeleton, and machined to the required size. The foamed silicon carbide ceramic framework integrally reinforced copper-based composite material friction plate can be obtained. The friction plate has the characteristics of good heat resistance, excellent friction performance, high mechanical stren...

Embodiment 3

[0059] The difference from Example 1 is:

[0060] First prepare foamed silicon carbide ceramics according to the method provided by the patent application number 03134039.3. Among them, the size of the foamed silicon carbide ceramics is: a ring with an outer diameter of Φ200, an inner diameter of Φ160, and a thickness of 3mm. The mesh size is 1mm, and the volume fraction is 30%. On the stainless steel ring, heat it to 800°C and put it into a Φ220 mold.

[0061] Using the die-casting method, heat the tin bronze QSn6-6-3 to the melting point temperature (1019°C) above 200°C, use a pressure of 100MPa, hold the pressure for 40 seconds, press it into the foamed silicon carbide ceramic skeleton, and machine it to the required size , you can get foam silicon carbide ceramic skeleton overall reinforced copper matrix composite material friction plate. The friction plate has the characteristics of good heat resistance, excellent friction performance, high mechanical strength and good ...

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Abstract

The invention relates to the friction material preparing technique, concretely a foam SiC ceramic-copper alloy two phase-combined, foam SiC ceramic frame whole reinforced copper-base composite friction plate and the preparing method thereof, and by volume fraction, the friction plate is composed of foam SiC ceramic 15%-50% and copper alloy 85%-50%; and the preparing method comprises the two key process steps of preparing high intensity, compact foam SiC ceramic and combining foam SiC ceramic with copper alloy: firstly preparing high intensity compact foam SiC ceramic, then making liquid copper alloy enter 3D connecting hole spacing of foam SiC ceramic by extrusion casting and solidify to make it. And it has characters of good heat resistance, excellent friction performance, high mechanical intensity and good process performance, able to act as novel high performance frictional brake and transmission material.

Description

technical field [0001] The invention relates to a friction material preparation technology, in particular to a foam silicon carbide ceramic skeleton integrally reinforced copper-based composite material friction sheet composed of two phases of foam silicon carbide ceramics and copper alloy and a preparation method thereof. Background technique [0002] Friction linings are critical components that are heavily used in power transmission and braking systems such as aircraft, tracked vehicles, and heavy-duty vehicles. Aircraft and vehicles continue to develop towards high power, high speed, and high maneuverability, which puts forward higher and higher requirements for the performance of transmission and braking devices. [0003] Advanced friction plate materials must have stable friction coefficient, low wear rate, high elastic modulus, sufficient mechanical strength, high heat resistance (including high melting point and high deformation resistance temperature), high thermal ...

Claims

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Application Information

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IPC IPC(8): F16D69/02
Inventor 张劲松曹小明胡宛平田冲邢宏伟
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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