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Powder metallurgy clutch friction piece and preparation method thereof

A technology of powder metallurgy and clutch, which is applied in the field of powder metallurgy, can solve the problems of not being able to reach railway railcars, shear resistance, low compressive strength, uneconomical, etc., and achieve flexible connection, no pollution to the environment, and stable friction coefficient Effect

Inactive Publication Date: 2014-01-29
WUHU HONGKUN AUTO PARTS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing friction materials have low shear and compressive strength and high wear and tear, which cannot meet the requirements of railway railcars, and their prices are high and uneconomical

Method used

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Examples

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Comparison scheme
Effect test

Embodiment Construction

[0016] specific implementation

[0017] The present invention will be described in detail below through specific examples.

[0018] A powder metallurgy clutch friction body, made of the following raw materials in parts by weight (kg): copper 1.4, iron powder 82, zircon sand 0.4, zinc 5.1, graphite 0.4, silicon carbide 0.4, mullite 0.2, Mg 6, Mn 1.6, V 0.6, Cr3.3, Ni 7.2, additive 2;

[0019] The auxiliary agent is made of the following raw materials in parts by weight (kg): iron powder 30, kaolin 2, alum 1, nano-carbon 1, polyisobutylene 2, aluminate coupling agent DL-411 1, sodium tripolyphosphate 2. Ricinoleic acid 1, aluminum nitride powder 2; the preparation method is to mix iron powder, kaolin, alum, and sodium tripolyphosphate, grind it into 200-300 mesh powder, and then add aluminate coupling agent DL-411 to mix Uniform, pressed into a blank at 10-15Mpa, then sent to 920-950°C for calcination for 3-4 hours, after cooling, crushed into 300-400 mesh powder, mixed with o...

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PUM

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Abstract

The invention discloses a powder metallurgy clutch friction piece. The invention is characterized in that the friction piece is prepared from the following raw materials in parts by weight: 1.4-1.8 parts of copper, 82-84 parts of iron powder, 0.4-0.8 part of zircon sand, 5.1-5.3 parts of zinc, 0.4-0.8 part of graphite, 0.4-0.6 part of silicon carbide, 0.2-0.4 part of mullite, 6-7 parts of Mg, 1.6-2.1 parts of Mn, 0.6-0.9 part of V, 3.3-3.5 parts of Cr, 7.2-7.6 parts of Ni and 2-3 parts of assistant. By adding the assistant, the alloy powder is dispersed uniformly, and the longitudinal and transverse uniformity of the internal structure of the product is ensured, so that the fatigue life of the product is prolonged; and the friction piece has the advantages of favorable on-off braking property, stable friction factor, soft and smooth run-on and high safety and reliability; and the clutch still has favorable frictional property in rain water, and has the advantages of environment friendliness and no pollution.

Description

technical field [0001] The invention relates to the field of powder metallurgy, in particular to a powder metallurgy clutch friction body and a preparation method thereof. Background technique [0002] The clutch driven friction disc assembly of rail locomotives is the key component of rail locomotive clutches used in various locomotive depots of the railway system. It forms a friction pair with the intermediate pressure plate (clutch couple) and plays a role in transmitting torque in the clutch. The function of stopping and retreating is an essential and important part in the rail locomotive clutch. There are 2 clutch driven friction disc assemblies and 1 middle pressure plate in each rail car clutch, plus the left and right end cover plates to form four friction pairs. Among them, the rail locomotive clutch driven friction disc assembly is composed of 12 clutch friction bodies, 1 clutch steel chip, 8 large and small damping springs, 1 flower disc, 1 spline tooth disc, 2 c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/58B22F3/16B22F5/00B22F1/00
Inventor 黄浩
Owner WUHU HONGKUN AUTO PARTS
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