Wet type friction clutch disc material for transmitting high power and preparation process

A clutch, high-power technology, applied in the direction of friction lining, mechanical equipment, etc., can solve the problems of insignificant effect, the performance of C/C composite materials cannot meet the requirements, etc., to improve the ability of shear resistance, improve hardness, The effect of increasing the coefficient of friction

Active Publication Date: 2014-01-08
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] To solve the above shortcomings and problems, some people have tried to introduce C / C friction materials into wet friction materials, but due to the special environment of the clutch and the support of the inner core plate, the performance of very thin C / C composite materials can not meet the requirements
Some people also use the method of adding multi-component composite friction agent to the wet copper-based friction material to increase the friction coefficient and thermal load, but the effect is not obvious

Method used

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  • Wet type friction clutch disc material for transmitting high power and preparation process

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] First, according to the mass percentage of alloy elements: Cu 62.8%, Fe 8%, Sn 3%, Zn 3%, Ni 2%, Ti 8.5%, SiO 2 4%, C 3.5%, W 0.2%, chopped carbon fiber T700, 5%, and forming agent (kerosene) to prepare a mixture, and the mixture is mixed with the powder in a roller ball mill for 6-8 hours; the mixture is cooled under a pressure of 500MPa Press molding, then paste the green compact and the supporting steel back and put it in a bell-type heating and sintering furnace for pressure sintering, and carry out pressure sintering under the protection of hydrogen. The sintering temperature is 920 ° C, the sintering pressure is 4.5 MPa, and the holding time is 3h. Water-cooled to room temperature and out of the furnace; after quenching the sintered parts at 800 °C, pressurized tempering at a temperature of 550 °C and a pressure of 5 MPa to achieve a certain hardness of the supporting steel back (HRC35-38), and the sintered parts were vacuum At a temperature of -0.2MPa and a tem...

Embodiment 2

[0027] First, according to the mass percentage of alloy elements: Cu 61.5%, Fe 8%, Sn 3%, Zn 3%, Ni 2%, Ti 8.5%, SiO 2 4%, C 3.5%, W 0.5%, chopped carbon fiber T700, 6% and forming agent to prepare alloy raw materials, and mix the powder in a roller ball mill for 6-8 hours; the mixture is cold-pressed under 700MPa pressure, and then The green compact and the supporting steel back were pasted and placed in a bell-type heating and sintering furnace for pressure sintering, under the protection of hydrogen, the sintering temperature was 900 °C, the sintering pressure was 3.5 MPa, and the holding time was 3 h. After water-cooling to room temperature, the sintered parts are quenched at 800 ° C, and then tempered under pressure at a temperature of 550 ° C and a pressure of 5 MPa to achieve a certain hardness (HRC35-38) of the supporting steel back. The temperature is -0.2MPa, the temperature is 500℃, impregnate the phenolic resin for high temperature resistant brake pads for 30 minu...

Embodiment 3

[0029] First, according to the mass percentage of alloy elements: Cu 64.5%, Fe 8%, Sn 3%, Zn 3%, Ni 2%, Ti 8.5%, SiO 2 4%, C 3.5%, W 0.5%, chopped carbon fiber T700, 3%, and forming agent to prepare alloy raw materials, and mix the powder in a roller ball mill for 6-8 hours; the mixture is cold-pressed under 700MPa pressure, and then The green compact and the supporting steel back were pasted together and placed in a bell-type heating and sintering furnace for pressure sintering. Under the protection of hydrogen, pressure sintering was carried out. The sintering temperature was 900°C, the sintering pressure was 3.0 MPa, and the holding time was 3 hours. After water-cooling to room temperature, the sintered parts are quenched at 850 °C, and then tempered under pressure at a temperature of 550 °C and a pressure of 7 MPa to achieve a certain hardness (HRC35-38) on the supporting steel back. The temperature is -0.2MPa, the temperature is 500℃, impregnate the phenolic resin for hi...

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Abstract

The invention discloses a wet type friction clutch disc material for transmitting high power and a preparation process. The wet type friction clutch disc material comprises the following components by weight percent: 60-70% of copper powder, 6-9% of iron powder, 2-4% of tin powder, 2-4% of zinc powder, 1-3% of nickel powder, 0-1% of tungsten powder, 7-9% of titanium powder, 3-5% of natural quartz sand, 2-3% of natural flaky graphite, 1-2% of particle graphite, and 0-7% of chopped carbon fiber. The ultimate shear strength is 28 MPa by adopting fiber strengthening; meanwhile, the heat-resisting coefficient is as high as 10400-11200 J2 / cm4.s. The strength of the material is further improved by dipping the high temperature resin, the abrasion is reduced, and the abrasion is about 5.6*10<-9>cm<3> / J, and the friction coefficient of the wet type friction material is improved, the friction coefficient is as follows: u(motion) equals to 0.102, and u(motionlessness) equals to 0.152. The hardness of a transmission part of the friction disc is improved by adopting press tempering treatment, the general HRC (Rockwell hardness) can be 35-38.

Description

Technical field: [0001] The invention relates to a novel high-torque and heavy-load wet copper-based clutch friction material and a preparation method thereof. Background technique: [0002] The clutch is a key part in the transmission system, relying on it to realize functions such as speed change, steering, parking and torque conversion lock. Its function is to reliably transmit the power of the engine to the load part. Its performance, life and reliability directly affect the The maneuverability of the vehicle and the flexibility of operation. At present, the dynamic friction coefficient of wet copper-based clutches used in my country is generally between 0.06 and 0.08. Although it meets the current GB technical requirements, with the increase of speed and load of various construction machinery, higher friction and wear properties of materials are proposed. requirements, especially the allowable heat load. Although some research units achieve 0.10 by adding a large amoun...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16D69/02B22F1/00B22F5/00B22F3/16B22F3/26
Inventor 张兆森徐慧宋招权严深浪
Owner CENT SOUTH UNIV
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