CN101070395B - Method for making braking shoe and piece of charcoal/charcoal-silicon carbonate composite material - Google Patents
Method for making braking shoe and piece of charcoal/charcoal-silicon carbonate composite material Download PDFInfo
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- CN101070395B CN101070395B CN200710035176A CN200710035176A CN101070395B CN 101070395 B CN101070395 B CN 101070395B CN 200710035176 A CN200710035176 A CN 200710035176A CN 200710035176 A CN200710035176 A CN 200710035176A CN 101070395 B CN101070395 B CN 101070395B
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Abstract
A preparation method of carbon/carbon-silicon carbide composite brake shoes and pads, the present invention produces C/C-SiC composite brake shoes and pads by several processes of mixing material, granulating, low-temperature hot embossing, high-temperature sintering, resin-impregnated solidifying, carbonizing, and buffing friction surface. The present invention, taking short carbon fiber as reinforced phase, can greatly reducing the cost comparing to those taking carbon fiber integer felt as reinforced phase; moreover, the content of various components can be effectively controlled by taking hot embossing; Adding SiC powder into raw material previously, can effectively increase the friction coefficient of brake shoes and pads, can achieve net-shape forming, can obviously reduce processing strength; Processing the mixture into irregular-appearance particles, and low-temperature hot embossing then, can effectively solve the bubbling and cracking problems of hot-embossed green body in sequent processes and decrease reject ratio.
Description
Technical field
The present invention relates to the manufacture method of a kind of manufacturing charcoal/carbon-silicon carbide (C/C-SiC) brake block brake sheet.This manufacture method can be used for the brake shoe brake lining of train, subway and engineering machinery, manufacturings such as automotive drum type braking sheet and disc brake pad.
Background technology
Charcoal fiber reinforcement C-SiC (being C/C-SiC) matrix material has the low (≤2.4gcm of density as brake material
-3), advantage such as wear resistance is good, frictional coefficient is high, braking is steady, anticorrosive, anti-oxidant, high temperature resistant, environmental compatibility strong (not failing as frictional coefficient under the hygrometric state) and life-span are grown, be a kind of high performance brake block brake sheet material.
The method for preparing the C/C-SiC brake material mainly contains chemical vapor infiltration, precursor infiltration and pyrolysis method, molten Si method of impregnation and hot pressing-sintering process, and temperature and pressure-in-situ reaction.Wherein, chemical vapor infiltration, precursor infiltration and pyrolysis method, molten Si method of impregnation need braiding charcoal fiber preform earlier, carry out carbon matrix and SiC density then, the C/C-SiC base substrate of density need could obtain the brake shoe brake lining through high-intensity mechanical workout, and C/C-SiC base substrate hardness height is difficult to processing such as cutting.Hot pressing-sintering process be with the charcoal fiber with slurries such as C powder, Si powder infiltrate handle after, drying is made no latitude cloth, will not have latitude cloth then to cut into certain size, and is stacked together, after hot pressed sintering obtains matrix material.This method need high temperature (〉=1500 ℃) high pressure (〉=just can obtain fine and close matrix material under 100MPa), damage charcoal fiber reduces its intensity; In addition, because the C/C-SiC composite body edge irregularity of making needs follow-up high-intensity mechanical workout just can obtain the brake shoe brake lining equally.Therefore, these four kinds of methods are difficult to be applied to the manufacturing of brake shoe brake linings such as train, automobile, subway, engineering machinery.
The national defence patent of invention of " preparation technology of a kind of charcoal/carbon-silicon carbide pottery brake lining " (application number: 200510000623.X), mainly to temperature and pressure-in-situ reaction prepare charcoal/carbon-silicon carbide pottery brake lining the technological process application patent protection.But this patent of invention only is applicable to that friction area is less than 60cm
2, thickness is less than the manufacturing of the brake lining of 1.5cm, and for the brake block brake sheet greater than this size, when adopting this method to make, base substrate easily produces bubbling and cracking in the manufacturing processed.
Summary of the invention
The purpose of this invention is to provide a kind of method of the C/C-SiC of manufacturing matrix material brake block brake sheet, make brake shoe or the disposable shaping of brake lining product, do not need high-intensity follow-up mechanical workout; Simultaneously, solve base substrate bubbling, problems of crack in the brake shoe brake lining manufacturing processed.
The manufacture method of charcoal/braking shoe and piece of charcoal/charcoal-silicon carbonate composite material, the present invention is starting material with short carbon fiber, powdered carbon, resin, pitch, Si powder and SiC powder, makes C/C-SiC matrix material brake shoe brake lining by operations such as batching batch mixing, granulation, low temperature and pressure shaping, high temperature sintering, resin impregnation curing, charing, surface of friction polishings; Concrete processing parameter is:
(1) starting material: length is the short carbon fiber of 2～15mm, granularity is the powdered carbon (can be Graphite Powder 99, pitch powdered carbon, resin powdered carbon or their mixture) of 0.075～0.30mm, granularity is the Si powder of 0.075～0.30mm, granularity is resin-oatmeal (can be resol, furane resin or Resins, epoxy) or the asphalt powder of 0.075～0.15mm, and granularity is the SiC powder of 0.075～0.15mm.
(2) batching batch mixing.The load weighted starting material blender of packing into is carried out batch mixing.Difference according to the requirement of brake shoe brake lining braking quality, raw-material proportioning can change in following scope, short carbon fiber 5～20% (mass content), Si powder 20～50% (mass content), powdered carbon 5～30% (mass content), resin-oatmeal or asphalt powder 10～30% (mass content), SiC powder 0～15% (mass content).
(3) granulation.Mixed starting material are carried out mechanical pelleting, and 75% grain diameter is good at 5～15mm, requires particle appearance irregular.
(4) low temperature and pressure.Particulate material is packed in the mold cavity, apply the pressure of 150～400MPa, be incubated 0.5～1 hour in 140 ℃～200 ℃, make particle be bonded to base substrate by resin solidification, the base substrate size is identical with brake shoe or the brake lining size that will make.
(5) high temperature sintering.By high temperature sintering, making resin (or pitch) pyrolysis charring is resin charcoal (or asphalt carbon) with base substrate, makes Si powder and powdered carbon, resin charcoal (or asphalt carbon) reaction generate β-SiC.Sintering carries out in vacuum oven, 1350 ℃～1700 ℃ of top temperatures, and furnace atmosphere is a vacuum, also can fill Ar to normal pressure, 30～60 hours time.
(6) follow-up density.Adopt liquid resin (or pitch) to the base substrate behind the sintering flood, curing, charing density.Dipping temperature is 50 ℃～80 ℃, and solidification value is 150 ℃～200 ℃, 800 ℃～900 ℃ of carbonization temperatures.
(7) friction surface processing.Base substrate after the follow-up density is carried out surface working, obtain brake shoe brake lining parts.
The present invention is wild phase with the short carbon fiber, be that wild phase is compared lower cost significantly with adopting the carbon fabric integer felt, and hot compacting can effectively be controlled the content of each composition; In starting material, add the SiC powder in advance, can effectively improve the frictional coefficient of brake shoe brake lining; By the adjustment of composition, particularly adjust Si powder and the content of SiC powder and both ratios in the starting material, can the frictional coefficient of C/C-SiC friction materials is adjustable between 0.25～0.50, abrasion loss is lower than 0.3cm
3/ MJ; Can realize that dead size is shaped, only need the friction surface of mechanical workout brake shoe brake lining, significantly reduce processing intensity; Compound is processed into the irregular particle of outward appearance, and then the low temperature and pressure shaping, bubbling and rimose problem, the rate of reducing the number of rejects and seconds appear in the base substrate that can effectively solve hot compacting in subsequent handling.
Embodiment
Embodiment 1
Adopt the technology of the present invention to make large-scale port machine C/C-SiC matrix material brake brake lining, brake lining friction area 105cm
2, thickness 1.4cm.
Starting material are that length is the short carbon fiber of 2～8mm, and granularity is the Graphite Powder 99 of 0.10mm, and granularity is the Si powder of 0.075mm, and granularity is the phenol-formaldehyde resin powder of 0.10mm.
Raw-material proportioning is short carbon fiber 10% (mass content), Si powder 36% (mass content), powdered carbon 30% (mass content), phenol-formaldehyde resin powder 24% (mass content).The load weighted starting material blender of packing into is carried out batch mixing.
Mixed starting material are carried out mechanical pelleting, and grain diameter is between 5～10mm.Particulate material is packed in the mold cavity, apply the pressure of 185MPa, insulation is 0.5 hour in 180 ℃, and starting material are hot pressed into the brake lining base substrate.With base substrate high temperature sintering in vacuum oven, 1450 ℃ of top temperatures are filled Ar and are kept normal pressure, 45 hours time in the stove.Base substrate after adopting furane resin to sintering floods (60 ℃), solidifies (190 ℃), charing density (900 ℃).The processing of base substrate friction surface is obtained C/C-SiC matrix material brake brake lining.
Carried out the friction and wear behavior test of C/C-SiC matrix material brake lining on the bench testing machine at 1: 1.The theoretical friction of steel retarding disc diameter is 70cm, brake pressurize 2.05N/mm
2, rotational inertia is 151.5kgm
2, the frictional coefficient of brake lining under different braking initial speed degree sees Table 1.40 times brake back brake lining average abrasion amount is 0.173cm
3/ MJ.
The frictional behaviour of C/C-SiC brake lining under the table 1 different braking initial speed degree
| Initial speed (rpm) | 800 | 1200 | 1500 | 1800 |
| Average friction coefficient | 0.45 | 0.36 | 0.26 | 0.22 |
| Braking time (s) | 0.67 | 1.41 | 2.17 | 3.14 |
Embodiment 2
Adopt the present technique invention to make train locomotive C/C-SiC matrix material brake brake lining, brake lining friction area 185cm
2, thickness 2.3cm.
Starting material are that length is the short carbon fiber of 10～15mm, and granularity is the Graphite Powder 99 of 0.15mm, and granularity is the Si powder of 0.15mm, and granularity is the phenol-formaldehyde resin powder of 0.10mm, and granularity is the SiC powder of 0.10mm.
Raw-material proportioning is short carbon fiber 16% (mass content), Si powder 27% (mass content), powdered carbon 23% (mass content), phenol-formaldehyde resin powder 22% (mass content), Si C powder 12% (mass content).The load weighted starting material blender of packing into is carried out batch mixing.
Mixed starting material are carried out mechanical pelleting, and the largest particle particle diameter is less than 15mm.Particulate material is packed in the mold cavity, apply the pressure of 320MPa, insulation is 0.7 hour in 180 ℃, and starting material are hot pressed into the brake lining base substrate.With base substrate high temperature sintering in vacuum oven, 1700 ℃ of top temperatures are filled Ar and are kept normal pressure, 50 hours time in the stove.Base substrate after adopting liquid furane resin to sintering floods (60 ℃), solidifies (200 ℃), charing density (850 ℃).The processing of base substrate friction surface is obtained C/C-SiC matrix material brake brake lining.
Carried out the train locomotive brake diagnostic test of C/C-SiC matrix material brake lining on the bench testing machine at 1: 1.Cast steel retarding disc diameter 75mm, wheel diameter 1050mm, the heavy 19.5T of axle, brake lining pressure 23.2kN.The frictional coefficient of brake lining under difference brake original speed sees Table 2.63 times brake back brake lining average abrasion amount is 0.375cm
3/ MJ.
The frictional behaviour of C/C-SiC brake lining under the table 2 different braking original speed
| Braking original speed (km/h) | 120 | 140 | 160 | 180 | 200 | 225 | 250 | 270 |
| Average friction coefficient | 0.35 | 0.34 | 0.32 | 0.31 | 0.30 | 0.28 | 0.28 | 0.27 |
Claims (2)
1. the manufacture method of charcoal/braking shoe and piece of charcoal/charcoal-silicon carbonate composite material, it is characterized in that: with short carbon fiber, powdered carbon, resin, pitch, Si powder and SiC powder is starting material, makes C/C-SiC matrix material brake shoe brake lining by batching batch mixing, granulation, low temperature and pressure shaping, high temperature sintering, resin impregnation curing, charing, surface of friction polishing operation; Concrete processing parameter is:
(1) starting material: length is the short carbon fiber of 2～15mm, and granularity is the powdered carbon of 0.075～0.30mm, and granularity is the Si powder of 0.075～0.30mm, and granularity is resin-oatmeal or the asphalt powder of 0.075～0.15mm, and granularity is the SiC powder of 0.075～0.15mm;
(2) the raw-material mass content of batching batch mixing is short carbon fiber 5～20%, Si powder 20～50%, powdered carbon 5～30%, resin-oatmeal or asphalt powder 10～30%, SiC powder 0～15%;
(3) granulation is carried out mechanical pelleting with mixed starting material, and 75% grain diameter is at 5～15mm;
(4) low temperature and pressure is packed particulate material in the mold cavity into, applies the pressure of 50～400MPa, is incubated 0.5～1 hour in 140 ℃～200 ℃, makes particle be bonded to base substrate by resin solidification, and the base substrate size is measure-alike with brake shoe or the brake lining that will make;
(5) by high temperature sintering, sintering carries out in vacuum oven high temperature sintering with base substrate, 1350 ℃～1700 ℃ of top temperatures, and 30～60 hours time, furnace atmosphere is vacuum or fills Ar to normal pressure;
(6) base substrate after density adopts liquid resin or pitch to sintering floods, curing, charing density, and dipping temperature is 50 ℃～80 ℃, and solidification value is 150 ℃～200 ℃, 800 ℃～900 ℃ of carbonization temperatures;
(7) friction surface processing is carried out surface working with the base substrate after the density, obtains brake shoe brake lining parts;
Described resin-oatmeal is a phenol-formaldehyde resin powder;
Described liquid resin is liquid furane resin.
2. manufacture method according to claim 1 is characterized in that: described powdered carbon is Graphite Powder 99, pitch powdered carbon, resin powdered carbon or their mixture.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710035176A CN101070395B (en) | 2007-06-20 | 2007-06-20 | Method for making braking shoe and piece of charcoal/charcoal-silicon carbonate composite material |
Applications Claiming Priority (1)
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|---|---|---|---|
| CN200710035176A CN101070395B (en) | 2007-06-20 | 2007-06-20 | Method for making braking shoe and piece of charcoal/charcoal-silicon carbonate composite material |
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| CN101070395A CN101070395A (en) | 2007-11-14 |
| CN101070395B true CN101070395B (en) | 2010-05-26 |
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Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102494065A (en) * | 2011-11-29 | 2012-06-13 | 重庆红宇摩擦制品有限公司 | Manufacturing process of drum-type friction material |
| CN103449818B (en) * | 2013-08-06 | 2016-01-20 | 西安科技大学 | A kind of preparation method of carbon fiber/silicon carbide gradient laminar composite material |
| CN104119837B (en) * | 2014-07-30 | 2016-06-08 | 太仓力达莱特精密工业有限公司 | A kind of preparation method of fiber reinforced ceramic-base friction material |
| US20190249059A1 (en) * | 2016-06-13 | 2019-08-15 | Teijin Limited | Silicon carbide production method and silicon carbide composite material |
| CN106830967B (en) * | 2016-12-30 | 2020-08-14 | 烟台凯泊复合材料科技有限公司 | Heat-resistant high-strength carbon/ceramic fastener and preparation method thereof |
| CN107100949B (en) * | 2017-04-17 | 2019-01-29 | 湖南世鑫新材料有限公司 | A kind of combined type composite material brake disc and preparation method and application |
| CN107010979B (en) * | 2017-04-25 | 2020-08-04 | 宁波欧翔精细陶瓷技术有限公司 | Preparation method of novel carbon fiber reinforced silicon carbide composite material |
| CN109279899A (en) * | 2018-10-23 | 2019-01-29 | 山东宝纳新材料有限公司 | Carbon/carbide composite ceramic preparation method, its carbon/carbide composite ceramic, application and brake disc obtained |
| CN111961912B (en) * | 2020-08-26 | 2022-01-25 | 中南大学 | Copper-based powder metallurgy friction material for high-energy braking |
| CN113548902A (en) * | 2021-08-27 | 2021-10-26 | 北京理工大学 | Preparation method of carbon fiber reinforced silicon carbide brake disc |
| CN113929480B (en) * | 2021-11-12 | 2023-04-21 | 航天特种材料及工艺技术研究所 | C/SiC ceramic matrix composite material and preparation method thereof |
| CN115558446B (en) * | 2022-09-19 | 2023-09-29 | 湖南博云新材料股份有限公司 | Adhesive for two-in-one of carbon/carbon aircraft brake half discs and application thereof |
| CN115383469B (en) * | 2022-09-21 | 2024-03-29 | 杭州沃瑞奥汽车零部件有限公司 | Welding manufacturing process of urban railway brake shoe assembly |
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