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Preparation method of iron-copper based composite friction materials

A composite friction material, iron-copper-based technology, applied in friction linings, chemical instruments and methods, mechanical equipment, etc., can solve the problems of poor friction coefficient stability, heavy metal Cu pollution, insufficient wear resistance, etc. No pollution, good wear resistance

Active Publication Date: 2019-01-04
滁州欧瑞斯机车部件有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the defects of the above-mentioned prior art, the surface of the existing single iron-based friction material is easy to stick, the stability of the friction coefficient is poor, the wear resistance is not enough, the friction coefficient of the single copper-based friction material is small, the economic cost is high, the pollution of heavy metal Cu, etc. Problem, the purpose of the present invention is to provide a preparation method of iron-copper-based composite friction material, to give full play to the respective advantages of iron and copper, and at the same time, apply carbon fibers with high specific modulus and high specific strength to the iron-copper-based friction material, Enhance matrix strength, improve impact toughness, reduce brake noise, appropriate friction coefficient, excellent high temperature wear resistance

Method used

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  • Preparation method of iron-copper based composite friction materials
  • Preparation method of iron-copper based composite friction materials
  • Preparation method of iron-copper based composite friction materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Prepare a cylindrical friction block with a diameter of about 25 mm and a height of 10 mm, including the following steps:

[0032] Step 1, ingredients. Mix 30% of dendritic electrolytic copper powder of 40 microns, 35% of spherical or nearly spherical atomized iron powder with a particle size of 40 microns, 3% of titanium powder, nickel powder and molybdenum powder of 40 microns and 60 microns of scaly graphite powder 9%, 4% chopped carbon fiber with a diameter of 5 microns and a length of 1 mm, 2% of nearly spherical molybdenum disulfide of 60 microns, plus 3% of kaolin, feldspar powder and mullite of 70 microns, and 2% of 70 microns mixed with vermiculite powder. And according to the formula 1, the theoretical density ρ is calculated to be 4.88 g / cm 3 .

[0033] Step 2, mixing ingredients. Weigh the raw materials in step 1 according to the proportion and put them into a "Y"-shaped mixer, add 120# solvent gasoline at 10 ml / kg, and then mix for 2 hours at a speed of...

Embodiment 2

[0040] Prepare a cuboid friction block with a length of 40 mm, a width of 20 mm, and a height of 10 mm, comprising the following steps:

[0041] Step 1, ingredients. 40% of dendritic electrolytic copper powder of 60 microns, 30% of spherical or nearly spherical atomized iron powder with a particle size of 60 microns, 2.5% of titanium powder, nickel powder and molybdenum powder of 60 microns and flaky graphite powder of 80 microns 8%, 3% chopped carbon fiber with a diameter of 7 microns and a length of 3 mm, 4% of nearly spherical molybdenum disulfide of 80 microns, plus 100 microns of kaolin, feldspar powder and mullite each 2%, and 1.5% of 100 microns mixed with vermiculite powder. And according to formula 1, the theoretical density ρ is calculated to be 5.31 g / cm 3 .

[0042] Step 2, mixing ingredients. Weigh the raw materials in step 1 according to the proportion and put them into a "Y"-shaped mixer, add 120# solvent gasoline at 12 ml / kg, and then mix the materials for ...

Embodiment 3

[0049] Prepare a fan-shaped friction block with an outer arc radius of 80 mm, an inner arc radius of 60 mm, a central angle of 80 degrees, and a thickness of 10 mm, including the following steps:

[0050] Step 1, ingredients. 37% of dendritic electrolytic copper powder of 50 microns, 33% of spherical or nearly spherical atomized iron powder with a particle size of 50 microns, 2% of titanium powder, nickel powder and molybdenum powder of 50 microns and 70 microns of flake graphite powder 10%, 2% chopped carbon fiber with a diameter of 6 microns and a length of 3 mm, 2.7% of nearly spherical molybdenum disulfide of 70 microns, plus 2.7% of kaolin, feldspar powder and mullite of 80 microns, and 1.2% of 80 Micron vermiculite powder is mixed, and according to formula 1, the theoretical density ρ is calculated to be 5.05 g / cm 3 .

[0051] Step 2, mixing ingredients. Weigh the raw materials in step 1 according to the proportion and put them into a "Y"-shaped mixer, add 120# solven...

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Abstract

Provided is a preparation method of iron-copper based composite friction materials. After raw materials are burdened and mixed, a mixture is obtained after being subjected to cold pressing and then subjected to high-temperature hot pressing and sintering, and the mixture is subjected to compression moulding forming through the pressure intensity of 450-550 MPa; and a pressed blank is put into a heating furnace and is subjected to pressure sintering under the nitrogen protection atmosphere, and the sintering process includes the steps that heat is preserved for 2-3 hours under the pressure of 2.5-2.8 MPa at 1000 DEG C and the billet is cooled along with the furnace. The friction materials are obtained through high-temperature hot pressing and sintering after cold pressing, the respective advantages of iron and copper are played, at the same time, carbon fibers with high specific modulus and high specific strength are applied into the iron-copper based composite friction materials, the strength of a matrix is enhanced, the impact toughness is improved, the brake noise is reduced, the friction coefficient is proper, and high-temperature abrasion resistance is good.

Description

technical field [0001] The invention relates to a preparation method of a composite friction material, in particular to a preparation method of an iron-copper-based composite friction material for braking and transmission of various engineering machinery. Background technique [0002] Friction material is a material that uses friction to transmit or absorb power, mainly including brake linings and clutch plates, and is widely used in various construction machinery and equipment such as automobiles, trains, airplanes, and oil drilling rigs. Commonly used friction materials are NAO type, semi-metal type and metal type friction materials. Among them, the NAO type friction material mainly uses glass fiber, aromatic polycool fiber or other fibers (carbon, ceramics, etc.) as reinforcement materials, and its performance mainly depends on the type of fiber and other added mixtures. It has excellent characteristics in terms of wear resistance and noise reduction, but it is sensitive...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16D69/02C09K3/14
CPCF16D69/02F16D2200/0008F16D2200/0052F16D2200/0065F16D2200/0086
Inventor 欧阳方明
Owner 滁州欧瑞斯机车部件有限公司
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