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Scooter made of whisker reinforced C-Al-Cu composite material and its making process

A composite material and whisker technology, which is applied in the formulation and preparation of whisker-reinforced carbon-aluminum-copper composite slides, can solve the problems of cumbersome preparation process of slides, high resistivity of slides, low compressive strength, etc., and achieve high strength, Short production cycle and improved impact toughness

Inactive Publication Date: 2007-03-21
杨连威
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the skateboard has good impact resistance, the preparation process of the skateboard is cumbersome, and the resistivity of the skateboard is high and the compressive strength is low.

Method used

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  • Scooter made of whisker reinforced C-Al-Cu composite material and its making process

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Embodiment 1: copper content 60wt%, whisker content 1.4wt%, graphite content 15wt% in copper-plated graphite powder, carbon fiber content 0.2wt%, aluminum content 15wt%, nickel content 2.4wt%, tin content 5.6wt%, niobium The content is 0.4wt%, and the uniform mixing time in the ball mill tank is 2.5h. After the raw materials are taken out, they are directly hot-pressed. The hot-pressing pressure is 200MPa, the temperature is 860°C, and the density of the skateboard is 4.28g / cm 3 , resistivity 0.18μΩ·m, impact toughness 3.80J / cm 2 , Bending strength 346MPa, friction coefficient 0.075, compressive strength 340MPa.

Embodiment 2

[0022] Embodiment 2: copper content 68wt%, whisker content 2wt%, graphite content 12wt% in copper-plated graphite powder, carbon fiber content 0.2wt%, aluminum content 11wt%, nickel content 1.5wt%, tin content 4.56wt%, niobium content 0.8wt%, the uniform mixing time in the ball mill tank is 3h, after the raw materials are taken out, they are directly hot-pressed, the hot-pressing pressure is 220MPa, the temperature during hot-pressing is 872°C, and the density of the skateboard is 4.4g / cm 3 , resistivity 0.16μΩ m, impact toughness 3.92J / cm 2 , Bending strength 328MPa, friction coefficient 0.062, compressive strength 342MPa.

Embodiment 3

[0023] Embodiment 3: copper content 62wt%, whisker content 3.4wt%, graphite content 12wt% in copper-plated graphite powder, carbon fiber content 0.24wt%, nickel content 3wt%, tin content 2wt%, niobium content 0.36wt%, aluminum content 17wt%, the uniform mixing time in the ball mill tank is 3.8h, after the raw materials are taken out, they are directly hot-pressed, the hot-pressing pressure is 220MPa, the temperature during hot-pressing is 860°C, and the density of the skateboard is 4.31g / cm 3 , resistivity 0.17μΩ·m, impact toughness 3.67J / cm 2 , Bending strength 325MPa, friction coefficient 0.080, compressive strength 322MPa.

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Abstract

The present invention is pantograph pan made of whisker reinforced C-Al-Cu composite material and its making process, and the pantograph pan of new material is used in high speed electric train. The composite material for the pantograph pan has whisker as reinforcing material, Al-Cu base material, C as self-lubricating anti-wear material, and Ni, Sn and Nb as additives. The pantograph pan is made through mixing all the components and hot pressing to form. The pantograph pan of the present invention has excellent conducting performance, high wear resistance, good shock resistance and less wear n the contact lines, and the material is suitable for high speed electric train as well as underground train and other electric vehicles.

Description

technical field [0001] The invention belongs to the field of new materials, and relates to a formula and a preparation method of a whisker-reinforced carbon-aluminum-copper composite sliding plate, which can be used on high-speed electric trains, urban subways or other electric vehicles. Background technique [0002] Skateboards are important current-collecting components of electric trains. Skateboards are required to have good electrical conductivity, wear resistance, impact resistance and toughness. At the same time, they are required to wear as little as possible on catenary wires. There are three types of slides commonly used in electric trains: carbon slides, powder metallurgy slides and metal-impregnated carbon slides. [0003] Carbon skateboards have good wear resistance, but they have high lift resistance and poor impact resistance, so they are easily broken during locomotive operation. The powder metallurgy slide plate has good electrical conductivity and impact t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L5/00H01B1/02
Inventor 杨连威
Owner 杨连威
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