CN112517905A - Preparation method of brake pad friction block - Google Patents
Preparation method of brake pad friction block Download PDFInfo
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- CN112517905A CN112517905A CN202011365808.1A CN202011365808A CN112517905A CN 112517905 A CN112517905 A CN 112517905A CN 202011365808 A CN202011365808 A CN 202011365808A CN 112517905 A CN112517905 A CN 112517905A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/10—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/02—Compacting only
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/10—Sintering only
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/20—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces by extruding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
- B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
- B22F9/082—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C47/00—Making alloys containing metallic or non-metallic fibres or filaments
- C22C47/14—Making alloys containing metallic or non-metallic fibres or filaments by powder metallurgy, i.e. by processing mixtures of metal powder and fibres or filaments
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C49/00—Alloys containing metallic or non-metallic fibres or filaments
- C22C49/02—Alloys containing metallic or non-metallic fibres or filaments characterised by the matrix material
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C49/00—Alloys containing metallic or non-metallic fibres or filaments
- C22C49/14—Alloys containing metallic or non-metallic fibres or filaments characterised by the fibres or filaments
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D69/00—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces
- F16D69/02—Compositions of linings; Methods of manufacturing
- F16D69/027—Compositions based on metals or inorganic oxides
- F16D69/028—Compositions based on metals or inorganic oxides containing fibres
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/20—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces by extruding
- B22F2003/208—Warm or hot extruding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
- B22F2998/10—Processes characterised by the sequence of their steps
Abstract
The invention discloses a preparation method of a brake pad friction block, which comprises the steps of firstly adding part of raw materials into a vacuum gas atomization furnace for smelting, atomizing and screening powder, then pouring the raw materials and other residual raw materials into a double-cone mixer, continuously rotating a mixing cylinder to turn over the materials, and dispersing powder particles in the mixing cylinder; and (3) taking out the mixture obtained in the step (2), preparing a green body by die pressing, heating the obtained green body by induction heating or microwave heating, transferring the heated green body into a preheated extrusion die, carrying out hot extrusion, and cooling to room temperature to obtain the brake pad friction block. The brake lining friction block manufactured by the method improves the metallographic structure, has compact structure and good microstructure, and has the characteristics of good abrasion loss, stable friction coefficient, difficulty in generating abnormal abrasion and noise, low heat conduction coefficient and the like.
Description
Technical Field
The invention relates to a preparation method of a brake pad friction block.
Technical Field
At present, railways are the national infrastructure, the aorta for national economy and the popular vehicles. In order to ensure the high-speed safe operation of the high-speed motor train unit, a stable and good brake system is required, wherein the brake pads are key parts and vulnerable parts of the brake system of the high-speed train. The brake pad mainly comprises parts such as a friction block, a supporting pad, a back plate, a spring clamp and the like, wherein the friction block can float locally, so that the maximum effective contact area of contact friction with a brake disc and more stable and uniform brake pressure are obtained, however, in the braking process, as the friction block is frequently impacted by friction force and thermal load, the material fracture of a powder metallurgy friction body and the separation and peeling between the friction body and a steel back are easily generated, and the safety of a high-speed train is influenced. The existing preparation method is to sinter by using a bell jar furnace, and the preparation process comprises the following steps: the method comprises the steps of particle preparation, material mixing, profiling, pressureless sintering, splicing with a gluing friction plate, curing and oil groove processing, and has the advantages of long preparation process, fussy preparation process, long production period and low production efficiency due to the fact that a bell-jar furnace is used for sintering. The powder metallurgy technology is not limited by smelting, alloy components and other structural components can be added, and the alloy components and the other structural components can be adjusted within a quite large range according to requirements, so that the effect of matching with parts can be achieved in the aspect of mechanical properties. The powder metallurgy has high degree of mechanization, can reduce personnel, can improve the efficiency and further saves the cost. Therefore, the invention designs a new powder metallurgy process by optimizing the raw material combination and reasonably setting the proportion and the production process, thereby preparing the brake pad friction block with high performance, and having important significance for improving the shear strength of the brake pad friction block and prolonging the service life of the brake pad friction block.
Disclosure of Invention
The invention aims to provide a preparation method of a brake pad friction block aiming at the defects of the prior art.
The purpose of the invention is realized by the following technical scheme: a preparation method of a brake pad friction block comprises the following steps:
step 1, weighing the following raw materials in parts by weight: 100-120 parts of electrolytic copper powder, 20-40 parts of ferromanganese ore, 10-20 parts of chromite, 6-14 parts of nickel powder, 4-5 parts of tungsten carbide powder, 3-11 parts of boron nitride ceramic powder, 2-6 parts of calcium fluoride, 3-8 parts of cinnabar powder, 4-9 parts of chromium powder, 3-6 parts of zirconium silicate, 10-20 parts of niobium-titanium alloy powder, 5-12 parts of molybdenum disulfide, 2-5 parts of zinc stearate, 6-8 parts of nano boron fiber, 3-11 parts of tin sesquioxide, 10-20 parts of glass beads, 2-4 parts of nano diamond powder, 1-6 parts of hafnium boride, 2-8 parts of barium sulfate, 4-8 parts of barite powder and 1-3 parts of fatty acid diamide;
step 2, putting the electrolytic copper powder, the ferromanganese ore, the chromite, the nickel powder, the tungsten carbide powder, the chromium powder, the zirconium silicate, the niobium-titanium alloy powder, the molybdenum disulfide and the hafnium boride in the formula in the step 1 into a vacuum induction electromagnetic oven, and then heating to completely melt the electrolytic copper powder, the ferromanganese ore, the chromite, the nickel powder, the tungsten carbide powder, the chromium powder, the zirconium silicate, the niobium; then carrying out vacuum atomization treatment on the molten liquid, wherein the atomization pressure is 3-5MPa, then drying, and screening out powder with the particle size of 15-45 mu m; then pouring the powder and other raw materials into a double-cone mixer, continuously rotating a mixing cylinder to turn over the materials, and dispersing powder particles in the mixing cylinder;
step 3, taking out the mixture obtained in the step 2, and preparing a green body by mould pressing, wherein the applied pressure is 500-1500MPa, and the pressure maintaining time is 1-10 minutes;
step 4, heating the green body obtained in the step 3 by induction heating or microwave heating, wherein the heating temperature range is 1000-1200 ℃, the heating rate is 50-200 ℃/min, and the heat preservation time is 2-10 min;
and 5, moving the heated green body into a preheated extrusion die for hot extrusion, wherein the preheating temperature is 400-.
In the step 3, the applied pressure is 1000-1200MPa, and the pressure maintaining time is 4-6 minutes.
In the step 4, the temperature rise rate is 100-.
The preheating temperature is 450 ℃, the pressure is 1100MPa, and the extrusion ratio is 25: 1.
In the step 4, the heating rate is 120 ℃/min.
The invention has the following beneficial effects: the brake lining friction block manufactured by the method improves the metallographic structure, has compact structure and good microstructure, and has the characteristics of good abrasion loss, stable friction coefficient, difficulty in generating abnormal abrasion and noise, low heat conduction coefficient and the like.
Detailed Description
Example 1
A preparation method of a brake pad friction block comprises the following steps:
step 1, weighing the following raw materials in parts by weight: 120 parts of electrolytic copper powder, 40 parts of ferromanganese ore, 20 parts of chromite, 14 parts of nickel powder, 5 parts of tungsten carbide powder, 11 parts of boron nitride ceramic powder, 6 parts of calcium fluoride, 8 parts of cinnabar powder, 9 parts of chromium powder, 6 parts of zirconium silicate, 20 parts of niobium-titanium alloy powder, 12 parts of molybdenum disulfide, 5 parts of zinc stearate, 8 parts of nano boron fiber, 11 parts of tin sesquioxide, 20 parts of glass microsphere, 4 parts of nano diamond powder, 6 parts of hafnium boride, 8 parts of barium sulfate, 8 parts of barite powder and 3 parts of fatty acid diamide;
step 2, putting the electrolytic copper powder, the ferromanganese ore, the chromite, the nickel powder, the tungsten carbide powder, the chromium powder, the zirconium silicate, the niobium-titanium alloy powder, the molybdenum disulfide and the hafnium boride in the formula in the step 1 into a vacuum induction electromagnetic oven, and then heating to completely melt the electrolytic copper powder, the ferromanganese ore, the chromite, the nickel powder, the tungsten carbide powder, the chromium powder, the zirconium silicate, the niobium; then carrying out vacuum atomization treatment on the molten liquid, wherein the atomization pressure is 5MPa, then drying, and screening out powder with the particle size of 15-45 mu m; then pouring the powder and other raw materials into a double-cone mixer, continuously rotating a mixing cylinder to turn over the materials, and dispersing powder particles in the mixing cylinder;
step 3, taking out the mixture obtained in the step 2, and preparing a green body by mould pressing, wherein the applied pressure is 1500MPa, and the pressure maintaining time is 10 minutes;
step 4, heating the green body obtained in the step 3 by induction heating or microwave heating, wherein the heating temperature range is 1200 ℃, the heating rate is 200 ℃/min, and the heat preservation time is 10 min;
and 5, moving the heated green body into a preheated extrusion die, carrying out hot extrusion at the preheating temperature of 500 ℃, the pressure of 1500MPa and the extrusion ratio of 50:1, and cooling to room temperature to obtain the brake pad friction block.
Example 2
A preparation method of a brake pad friction block comprises the following steps:
step 1, weighing the following raw materials in parts by weight: 100 parts of electrolytic copper powder, 20 parts of ferromanganese ore, 10 parts of chromite, 6 parts of nickel powder, 4 parts of tungsten carbide powder, 3 parts of boron nitride ceramic powder, 2 parts of calcium fluoride, 3 parts of cinnabar powder, 4 parts of chromium powder, 3 parts of zirconium silicate, 10 parts of niobium-titanium alloy powder, 5 parts of molybdenum disulfide, 2 parts of zinc stearate, 6 parts of nano boron fiber, 3 parts of tin sesquioxide, 10 parts of glass microsphere, 2 parts of nano diamond powder, 1 part of hafnium boride, 2 parts of barium sulfate, 4 parts of barite powder and 1 part of fatty acid diamide;
step 2, putting the electrolytic copper powder, the ferromanganese ore, the chromite, the nickel powder, the tungsten carbide powder, the chromium powder, the zirconium silicate, the niobium-titanium alloy powder, the molybdenum disulfide and the hafnium boride in the formula in the step 1 into a vacuum induction electromagnetic oven, and then heating to completely melt the electrolytic copper powder, the ferromanganese ore, the chromite, the nickel powder, the tungsten carbide powder, the chromium powder, the zirconium silicate, the niobium; then carrying out vacuum atomization treatment on the molten liquid, wherein the atomization pressure is 3MPa, then drying, and screening out powder with the particle size of 15-45 mu m; then pouring the powder and other raw materials into a double-cone mixer, continuously rotating a mixing cylinder to turn over the materials, and dispersing powder particles in the mixing cylinder;
step 3, taking out the mixture obtained in the step 2, and preparing a green body by mould pressing, wherein the applied pressure is 500MPa, and the pressure maintaining time is 1 minute;
step 4, heating the green body obtained in the step 3 by induction heating or microwave heating, wherein the heating temperature range is 1000 ℃, the heating rate is 50 ℃/min, and the heat preservation time is 2 min;
and 5, moving the heated green body into a preheated extrusion die, carrying out hot extrusion at the preheating temperature of 400 ℃, the pressure intensity of 800MPa and the extrusion ratio of 5:1, and cooling to room temperature to obtain the brake pad friction block.
Example 3
A preparation method of a brake pad friction block comprises the following steps:
step 1, weighing the following raw materials in parts by weight: 110 parts of electrolytic copper powder, 30 parts of ferromanganese ore, 15 parts of chromite, 10 parts of nickel powder, 4.5 parts of tungsten carbide powder, 7 parts of boron nitride ceramic powder, 4 parts of calcium fluoride, 5 parts of cinnabar powder, 6 parts of chromium powder, 4 parts of zirconium silicate, 15 parts of niobium-titanium alloy powder, 8 parts of molybdenum disulfide, 3 parts of zinc stearate, 7 parts of nano boron fiber, 7 parts of tin sesquioxide, 15 parts of glass microsphere, 3 parts of nano diamond powder, 4 parts of hafnium boride, 5 parts of barium sulfate, 6 parts of barite powder and 2 parts of fatty acid diamide;
step 2, putting the electrolytic copper powder, the ferromanganese ore, the chromite, the nickel powder, the tungsten carbide powder, the chromium powder, the zirconium silicate, the niobium-titanium alloy powder, the molybdenum disulfide and the hafnium boride in the formula in the step 1 into a vacuum induction electromagnetic oven, and then heating to completely melt the electrolytic copper powder, the ferromanganese ore, the chromite, the nickel powder, the tungsten carbide powder, the chromium powder, the zirconium silicate, the niobium; then carrying out vacuum atomization treatment on the molten liquid, wherein the atomization pressure is 4MPa, then drying, and screening out powder with the particle size of 15-45 mu m; then pouring the powder and other raw materials into a double-cone mixer, continuously rotating a mixing cylinder to turn over the materials, and dispersing powder particles in the mixing cylinder;
step 3, taking out the mixture obtained in the step 2, and preparing a green body by mould pressing, wherein the applied pressure is 1000MPa, and the pressure maintaining time is 5 minutes;
step 4, heating the green body obtained in the step 3 by induction heating or microwave heating, wherein the heating temperature range is 1100 ℃, the heating rate is 100 ℃/min, and the heat preservation time is 6 min;
and 5, moving the heated green body into a preheated extrusion die, carrying out hot extrusion at the preheating temperature of 450 ℃, the pressure of 1100MPa and the extrusion ratio of 25:1, and cooling to room temperature to obtain the brake pad friction block.
Claims (5)
1. A preparation method of a brake pad friction block is characterized by comprising the following steps:
step 1, weighing the following raw materials in parts by weight: 100-120 parts of electrolytic copper powder, 20-40 parts of ferromanganese ore, 10-20 parts of chromite, 6-14 parts of nickel powder, 4-5 parts of tungsten carbide powder, 3-11 parts of boron nitride ceramic powder, 2-6 parts of calcium fluoride, 3-8 parts of cinnabar powder, 4-9 parts of chromium powder, 3-6 parts of zirconium silicate, 10-20 parts of niobium-titanium alloy powder, 5-12 parts of molybdenum disulfide, 2-5 parts of zinc stearate, 6-8 parts of nano boron fiber, 3-11 parts of tin sesquioxide, 10-20 parts of glass beads, 2-4 parts of nano diamond powder, 1-6 parts of hafnium boride, 2-8 parts of barium sulfate, 4-8 parts of barite powder and 1-3 parts of fatty acid diamide;
step 2, putting the electrolytic copper powder, the ferromanganese ore, the chromite, the nickel powder, the tungsten carbide powder, the chromium powder, the zirconium silicate, the niobium-titanium alloy powder, the molybdenum disulfide and the hafnium boride in the formula in the step 1 into a vacuum induction electromagnetic oven, and then heating to completely melt the electrolytic copper powder, the ferromanganese ore, the chromite, the nickel powder, the tungsten carbide powder, the chromium powder, the zirconium silicate, the niobium; then carrying out vacuum atomization treatment on the molten liquid, wherein the atomization pressure is 3-5MPa, then drying, and screening out powder with the particle size of 15-45 mu m; then pouring the powder and other raw materials into a double-cone mixer, continuously rotating a mixing cylinder to turn over the materials, and dispersing powder particles in the mixing cylinder;
step 3, taking out the mixture obtained in the step 2, and preparing a green body by mould pressing, wherein the applied pressure is 500-1500MPa, and the pressure maintaining time is 1-10 minutes;
step 4, heating the green body obtained in the step 3 by induction heating or microwave heating, wherein the heating temperature range is 1000-1200 ℃, the heating rate is 50-200 ℃/min, and the heat preservation time is 2-10 min;
and 5, moving the heated green body into a preheated extrusion die for hot extrusion, wherein the preheating temperature is 400-.
2. The method for preparing a brake lining friction block according to claim 1, wherein the method comprises the following steps: in the step 3, the applied pressure is 1000-1200MPa, and the pressure maintaining time is 4-6 minutes.
3. The method for preparing a brake lining friction block according to claim 1, wherein the method comprises the following steps: in the step 4, the temperature rise rate is 100-.
4. The method for preparing a brake lining friction block according to claim 1, wherein the method comprises the following steps: the preheating temperature is 450 ℃, the pressure is 1100MPa, and the extrusion ratio is 25: 1.
5. The method for preparing a brake lining friction block according to claim 3, wherein the method comprises the following steps: in the step 4, the heating rate is 120 ℃/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011365808.1A CN112517905A (en) | 2020-11-29 | 2020-11-29 | Preparation method of brake pad friction block |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011365808.1A CN112517905A (en) | 2020-11-29 | 2020-11-29 | Preparation method of brake pad friction block |
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| CN112517905A true CN112517905A (en) | 2021-03-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011365808.1A Pending CN112517905A (en) | 2020-11-29 | 2020-11-29 | Preparation method of brake pad friction block |
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| CN106312052A (en) * | 2016-10-21 | 2017-01-11 | 广西南宁智翠科技咨询有限公司 | High-density powder metallurgy material for train brake lining |
| CN106392062A (en) * | 2016-10-21 | 2017-02-15 | 广西南宁智翠科技咨询有限公司 | Powder metallurgy material for train brake pad |
| CN107881396A (en) * | 2017-11-30 | 2018-04-06 | 无锡昊瑜节能环保设备有限公司 | A kind of preparation method of automobile brake sheet low noise powdered metallurgical material |
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2020
- 2020-11-29 CN CN202011365808.1A patent/CN112517905A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004081405A1 (en) * | 2003-03-10 | 2004-09-23 | Ms Production Miklavz Zornik S.P. | Friction material and process of manufacturing thereof |
| CN1947895A (en) * | 2006-11-09 | 2007-04-18 | 上海交通大学 | Method for preparing copper based composite material reinforced by surface modified granules for spot welding electrode |
| CN104043836A (en) * | 2014-06-03 | 2014-09-17 | 芜湖水泵制造有限公司 | Preparation method of powder metallurgy gear with excellent performance |
| CN105018768A (en) * | 2015-07-31 | 2015-11-04 | 陕西斯瑞工业有限责任公司 | High-performance copper chromium contactor material and preparing method thereof |
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| CN106312052A (en) * | 2016-10-21 | 2017-01-11 | 广西南宁智翠科技咨询有限公司 | High-density powder metallurgy material for train brake lining |
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