Preparation process of carbon base sliding block material for track vehicle

Abstract

The preparation method comprises: 1) raw material processing: placing graphite, coke blacking, chopped carbon fiber and modifier at the drying cabinet to remove moisture from them; the drying temperature is 100 deg. C, and the drying time is 2-4 hours; 2) blending: evenly blending the graphite, coke blacking and chopped carbon fiber; adding the copper powder, copper fiber and modifier; in the last, adding phenolic resin to make mould material; 3) hot compacting and forming: placing the mould materials into die; heating and pressing it to make solidification forming; the press is 50-100MP, and the temperature is 160-170 deg. C; keeping 0.5-1 hours in room temperature; 4) sintering: making the sintering form the sample; the temperature is 800-900 deg. C, and the time length is 2-4 hours; 5) densification processing: after chemical vapor deposition or bituminizing, making the carbonizing treatment.

Description

(1) Technical field: [0001] The invention relates to a preparation process of a carbon-based slider material for rail vehicles, and belongs to the technical field of carbon / carbon composite materials. (two) background technology: [0002] The electrification and high-speed of railways have become the development trend of the world's railway transportation, and the pantograph slide is the soul part of the electric locomotive, and the quality of the slide has an important impact on the flow of the locomotive. At present, the slides used in electric locomotives mainly include copper slides, pure carbon slides, powder metallurgy slides and metal-impregnated carbon slides. Copper sliding plate has good electrical conductivity, high mechanical strength, convenient material acquisition, long service life, and low cost, but it has a large wear on the catenary wire and poor arc resistance, and its use is currently restricted; pure carbon sliding plate has self-lubricating properties ...

AI Technical Summary

Problems solved by technology

Copper sliding plate has good electrical conductivity, high mechanical strength, convenient material acquisition, long service life, and low cost, but it has a large wear on the catenary wire and poor arc resistance, and its use is currently restricted; pure carbon sliding plate has self-lubricating properties and wears the wire Low, and has good contact stability, but its inherent resistance is large, low mechanical strength, brittle, prone to breakage and block loss, and is also greatly limited in the scope of use; powder metallurgy slides generally have iron base and copper There are two basic types, which have high mechanical strength and strong impact resistance, but they are not ideal materials for catenary wires. The biggest shortcoming is poor arc resistance. The arc generated when offline often burns the slide plate or The mesh wire is melted; the impregnated metal slide plate has good electrical conductivity, which basically solves the problem of low mechanical strength of the pure carbon slide plate, greatly improves the wear resistance, and can fundamentally solve the problem of excessive wear of the mesh wire, but its impact resistance Insufficient, easy to appear block phenomenon, need to be constantly shaped during use, and the preparation process is complicated, the production and maintenance costs are too high

[0003] In order to solve the deficiencies of the above-mentioned pantograph slides, in recent years, some domestic scientific research institutions have begun to use carbon-based composite materials as slide materials. Some slides use copper-plated graphite as the conductive base material or modified components. Chopped carbon fiber (not greater than 8cm), continuous long carbon fiber (diameter less than 20μm) and copper-coated carbon fiber are used as reinforcing materials to develop skateboard materials. Although they all have good mechanical strength and electrical conductivity, and excellent friction and wear properties, the raw materials The pretreatment process is complicated and the production cost is high, which greatly reduces its market competitiveness

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