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Micro porous friction material and its producing method

A technology of friction material and manufacturing method, which is applied in the field of microporous friction material and its manufacturing, which can solve the problems of damage, hook peeling, cracking and other problems of the paired material, and meet the requirements of working conditions, good physical and mechanical properties, and good friction performance effect

Active Publication Date: 2007-04-11
SHANGHAI RENPHEN COMPOSITE MARERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, increasing the PV value of the material by traditional methods will inevitably increase its hardness, so that although the friction material can barely meet the requirements, it will cause greater damage to the dual material (such as the wheel tread, the surface of the brake disc, etc.), such as turtles. Cracks, peeling and hook wear, etc., thus affecting driving safety

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] The raw material composition and content of the brake shoe are as follows:

[0048] Component Weight percent

[0049] Steel Fiber 20%

[0050] Kevlar Pulp 979 2.5%

[0051] Fluorene type epoxy (DGEBF) modified phenolic resin 20%

[0052] Zinc Oxide 3.5%

[0053] Clay 17%

[0054] Graphite 5%

[0055] Precipitated barium sulfate 32%

[0056] Add the above-mentioned raw materials into the high-speed rake mixer in proportion and step by step, and mix the materials at room temperature at 400kg / cm 2 The pressure reaction is 300 seconds to form, and then put the formed billet into the sintering furnace, and sinter at a temperature of 180 ° C for 8 hours to obtain the brake shoe. The performance of the brake shoe is as follows:

[0057] 1. Physical and mechanical properties

[0058] 1. Porosity: 15.9%,

[0059] 2. Rockwell hardness: HRR 62.5,

[0060] 3. Impact strength: 0.19J / cm 2 ,

[0061] 4. Compressive strength: 86.0MPa.

[0062] 2. Friction performance

[0...

Embodiment 2

[0065] A microporous friction material, the raw material formula and weight percentage of the friction material are as follows:

[0066] Component Weight percent

[0067] PMR polyimide modified phenolic resin 10%,

[0068] Nitrile powder 10%,

[0069] Kaolin 20%,

[0070] Precipitated Barium Sulfate 25%,

[0071] Graphite 20%,

[0072] Zinc Oxide 1%,

[0073] Corundum 1%,

[0074] Chromite powder 1%,

[0075] Iron Oxide Red 1%,

[0076] Steel Fiber 10%,

[0077] Aramid pulp 0.1%,

[0078] Carbon Fiber 0.9%.

[0079] Add the above-mentioned raw materials into the high-speed rake mixer in proportion and step by step, and mix the materials at 800kg / cm2 at 120°C 2 The pressure reaction is 20 seconds, and then the formed billet is put into a sintering furnace and sintered at a temperature of 150°C for 2 hours to obtain a microporous friction material.

[0080] The micropores in the friction material are evenly distributed, the pore size is small, about 1μ, the porosity re...

Embodiment 3

[0082] A microporous friction material, the raw material formula and weight percentage of the friction material are as follows:

[0083] Component Weight percent

[0084] Silicone modified phenolic resin 35%,

[0085] Kaolin 20%,

[0086] Precipitated Barium Sulfate 25%,

[0087] graphite 5%,

[0088] Zinc Oxide 1%,

[0089] Steel Fiber 10%,

[0090] Aramid pulp 2%,

[0091] Carbon Fiber 2%.

[0092] Add the above-mentioned raw materials into the high-speed rake mixer in proportion and step by step, and mix the materials at 200kg / cm2 at 140°C 2 The pressure reaction is 300 seconds for forming, and then the formed billet is put into a sintering furnace, and sintered at a temperature of 200°C for 16 hours to obtain a microporous friction material.

[0093] The micropores in the friction material are evenly distributed, the pore size is small, about 2μ, the porosity reaches 5%, the friction coefficient: 0.3, the abrasion loss: 20 grams, and the impact strength: 0.19J / cm ...

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Abstract

The present invention relates to one kind of microporous friction material and its production process. The friction material is produced with the raw materials including modified resin 10-35 wt%, butyronitrile powder 0-10 wt%, kaolin 20-40 wt%, precipitated barium sulfate 25-50 wt%, graphite 5-20 wt%, zinc oxide 1-10 wt%, corundum 0-1 wt%, chromite powder 0-5 wt%, iron oxide red 0-2 wt%, steel fiber 10-30 wt%, aramid fiber pulp 0.1-10 wt%, and carbon fiber 0- 10 wt%. The production process includes mixing the raw materials, reaction and forming at the temperature from room temperature to 140 deg.c and the pressure of 200-800 kg / sq cm for 20-800 sec, and final sintering in a sintering furnace at 150-200 deg.C for 2-16 hr. Compared with available technology, the present invention has the advantages of excellent friction performance, excellent physical and mechanical performance, no noise, etc.

Description

technical field [0001] The invention relates to a friction material and a manufacturing method thereof, in particular to a microporous friction material and a manufacturing method thereof. Background technique [0002] As we all know, rail transportation vehicles are developing towards high speed and heavy load, especially urban rail transportation, whose braking frequency is unmatched by other transportation vehicles. Therefore, the PV value requirements for brake materials (friction materials) are also increasing day by day. The industry generally adopts the method of increasing the PV value of the material to improve the performance of the material. However, increasing the PV value of the material by traditional methods will inevitably increase its hardness, so that although the friction material can barely meet the requirements, it will cause greater damage to the dual material (such as the wheel tread, the surface of the brake disc, etc.), such as turtles. Cracks, pee...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/14C08L61/14C08K7/06C08L9/02C08K3/34C08K3/30C08K3/22C08K3/04
Inventor 张定权
Owner SHANGHAI RENPHEN COMPOSITE MARERIALS
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