CN113814402A - Preparation method of brake disc of heavy engineering machinery vehicle - Google Patents
Preparation method of brake disc of heavy engineering machinery vehicle Download PDFInfo
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
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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
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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
- B22F3/10—Sintering only
- B22F3/1003—Use of special medium during sintering, e.g. sintering aid
- B22F3/1007—Atmosphere
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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
- B22F3/12—Both compacting and sintering
- B22F3/14—Both compacting and sintering simultaneously
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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
- B22F3/24—After-treatment of workpieces or articles
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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
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/04—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C30/00—Alloys containing less than 50% by weight of each constituent
- C22C30/02—Alloys containing less than 50% by weight of each constituent containing copper
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C32/00—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ
- C22C32/0005—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with at least one oxide and at least one of carbides, nitrides, borides or silicides as the main non-metallic constituents
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- 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
- B22F3/24—After-treatment of workpieces or articles
- B22F2003/241—Chemical after-treatment on the surface
- B22F2003/242—Coating
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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
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/04—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
- B22F2009/043—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling by ball milling
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Abstract
The invention relates to a manufacturing method of a key component of a heavy engineering machinery vehicle. The method for preparing the brake disc of the heavy engineering machinery vehicle has the characteristics of simple process, convenience in manufacturing and low cost; the brake disc prepared by the method has stable friction and wear performance, good strength and toughness, higher thermal cracking resistance, good heat resistance and fatigue resistance, thermal conductivity, lower braking noise, small dual damage, long service life, and the like, and meets the requirements of environmental protection and the like. The technical scheme is as follows: a preparation method of a brake disc of a heavy engineering machinery vehicle comprises the following steps: 1) preparing materials; 2) mixing materials; 3) sieving; 4) pressing; 5) sintering under no pressure; 6) crushing and ball-milling; 7) drying and sieving; 8) pressing; 9) pressure sintering; 10) coating; 11) and (6) assembling.
Description
Technical Field
The invention relates to a manufacturing method of a key part of a heavy engineering machinery vehicle, in particular to a manufacturing method of a brake disc of the heavy engineering machinery vehicle.
Background
The heavy engineering mechanical vehicle is an important component of equipment manufacturing industry, and plays a significant role in infrastructure, production, agriculture, forestry, animal husbandry, fishery, city construction and other aspects. With the further promotion of China, domestic resource development and utilization and emergency rescue drive the rapid growth of the heavy engineering machinery vehicle market.
Heavy engineering machinery vehicles require high efficiency, heavy load, high speed and the like, so that the braking system of the engineering machinery vehicle bears larger and larger load, and more rigorous requirements are provided for the braking technology of the mechanical vehicle. Especially, emergency braking when the mechanical vehicle meets an emergency situation is realized by mainly depending on braking friction between a brake disc and a mating part in a mechanical vehicle braking system, the brake disc of the heavy engineering mechanical vehicle is used as one of key parts of the braking system, and the performance of the brake disc of the heavy engineering mechanical vehicle is directly related to the braking safety of the engineering mechanical vehicle. Heavy work machine vehicle brake discs should have (1) high temperature coefficient of friction stability. At high temperatures, pressures and speeds, the friction coefficient of the brake disc needs to be sufficiently high and there is sufficient stability. When the brake is worn out, the change of the friction coefficient of the brake disc is not more than +/-15% of the value obtained under the same condition after the brake is worn out. The mean coefficient of friction obtained under maximum contact pressure, wet conditions, cannot vary by more than ± 15% with respect to the dry conditions, when the other conditions are unchanged. (2) High anti-caking property. The friction pair does not adhere to the working surface of the friction pair, and the friction surface does not peel off, scratch, swing and other destructive damages. (3) High heat resistance. The mechanical property and the friction property of the alloy are basically kept unchanged when the instantaneous friction temperature is increased to 100-l 2OO ℃ and the long-time friction temperature is increased to 300-400 ℃. (4) High thermophysical stability. The friction material should be able to withstand frequent thermal changes, i.e. be resistant to thermal fatigue, while at the same time having a rather high thermal conductivity, specific heat value and as small a linear expansion coefficient as possible. (5) Sufficient mechanical strength. The material should not crack, delaminate, crack deeply, peel off and peel off from the steel backing; ensuring a feasible wear rate. (6) High environmental friendliness. Can have stronger corrosion resistance and candlelight property under the humid environment and the temperature range of minus 80 ℃ to 50 ℃ for a long time. Therefore, the preparation of the brake disc of the heavy engineering machinery vehicle is a very difficult key technology.
Disclosure of Invention
The invention aims to meet the requirements of the background technology and provides a method for preparing a brake disc of a heavy engineering machinery vehicle, which has the characteristics of simple process, convenient manufacture and lower cost; the brake disc prepared by the method has stable friction and wear performance, good strength and toughness, higher thermal cracking resistance, good heat resistance and fatigue resistance, thermal conductivity, lower braking noise, small dual damage, long service life, and the like, and meets the requirements of environmental protection and the like.
The technical scheme provided by the invention is as follows: a preparation method of a brake disc of a heavy engineering machinery vehicle comprises the following steps:
1) preparing materials: and (3) adding the following components in percentage by weight of 2: 1: 0.8: 1.1: 0.6: 1.8: respectively weighing titanium powder, aluminum powder, copper-tin alloy powder, cerium-tin alloy powder, boron-fluorine-containing aluminum oxide powder, titanium carbide powder and colloidal graphite powder in a molar ratio of 0.4, and putting the titanium powder, the aluminum powder, the copper-tin alloy powder, the cerium-tin alloy powder, the boron-fluorine-containing aluminum oxide powder, the titanium carbide powder and the colloidal graphite powder into a ball mill;
2) mixing materials: weighing a certain amount of agate balls, and ensuring the mass ratio of the balls to the materials to be 3: 1, putting the mixture into a ball mill filled with raw materials for dry mixing, ball-milling the mixture for 540 to 600 minutes at the rotating speed of 450 to 500r/min, and taking out the mixture;
3) sieving: sieving the agate balls by using a sieve to obtain a uniformly mixed raw material;
4) pressing: pouring the uniformly mixed raw material powder into a pre-pressing forming die, and pre-pressing at the pressure of 80MPa for 3-5 minutes to obtain a formed blank body;
5) pressureless sintering: placing the formed blank body into a vacuum pressureless sintering furnace with a set program, and carrying out pressureless sintering in an argon protective atmosphere; the sintering temperature is 1200-1250 ℃, and the heat preservation time is 75-90 minutes; cooling to 80 ℃ after pressureless sintering, opening the furnace and taking out to obtain a high-purity alloy powder block;
6) crushing and ball-milling: crushing the synthesized high-purity alloy powder block to small powder blocks of 60-80 meshes by using a crusher, then putting the small powder blocks into a ball mill, adding agate balls, pouring hexafluoroisopropanol into the crushed powder blocks, further grinding and crushing, wherein the ball milling time is 580-600 minutes, and the rotating speed of the ball mill is 450-500 r/min;
7) drying and sieving: taking the ball material out of the planetary ball milling tank, drying the ball material in an oven at the temperature of 100-110 ℃ for 220-230 minutes, screening the agate balls out by using a screen after cooling, and screening the dried powder by using a 350-mesh fine screen;
8) pressing: putting the powder into a die cavity and pressing the powder into a brake block, wherein the molding pressure is 600Mpa +/-10 Mpa, and the molding time is 3-5 minutes;
9) pressure sintering: and (3) putting the formed brake block into a vacuum hot-pressing furnace with a set program, and performing secondary pressure sintering under the protection of argon. The sintering temperature is 1450-1500 ℃, the pressure is 30-40 MPa, and the heat preservation time is 50-60 minutes; after hot-pressing sintering, pressure relief is carried out and furnace cooling is carried out, so as to obtain a high-purity high-density block material;
10) coating: preparing the titanium aluminum nitride coating on the brake disc back plate after cleaning treatment by adopting an atmospheric plasma spraying process, wherein the process parameters are as follows: the current is 580-600A, the voltage is 62-65V, the standard flow of argon is 35-45, the standard flow of hydrogen is 11-13, the spraying distance is 100-120 mm, and the speed of a powder feeder is 30-35%;
11) assembling: and assembling the sintered brake block and the back plate.
In the step 6), the mass ratio of the agate balls to the small powder fragments is 2: 1.
in the step 6), the hexafluoroisopropanol added should submerge the agate balls and the raw materials in the ball mill.
The specifications of the sieves in the step 2) and the step 7) are all 20 meshes.
The invention has the beneficial effects that: the brake disc for the heavy engineering machinery vehicle has stable friction and wear performance, good strength and toughness, higher thermal cracking resistance, good heat resistance and fatigue resistance, thermal conductivity and lower braking noise, has small damage to wheels and long service life, and meets the requirements of environmental protection and the like. Through tests (the initial braking speed is 50-70 Km/h, the heavy load is 50 tons, the pressure of a single-side brake disc is 28-32 KN, and the test environment is in a dry state and a wet state), all technical indexes of the brake disc accord with the technical specifications of manufacturers and are superior to similar products. In addition, all raw materials of the heavy engineering machinery vehicle brake disc can be purchased from other places, so that the heavy engineering machinery vehicle brake disc not only meets the requirement of environmental protection, but also has simple manufacturing process, convenient manufacture, lower cost and wide market prospect.
Drawings
Fig. 1 is a front view schematically illustrating a brake disc for a heavy construction machine vehicle according to the present invention.
Fig. 2 is a schematic sectional structure view of fig. 1.
Detailed Description
The following further description is made with reference to the embodiments shown in the drawings.
The heavy construction machinery vehicle brake disc shown in the drawing comprises a circular ring-shaped back plate 1 and a plurality of brake blocks 2 which are fixedly embedded on two end faces of the back plate, and a plurality of embodiments of the heavy construction machinery vehicle brake disc are provided below.
Example 1
A preparation method of a brake disc of a heavy engineering machinery vehicle is carried out according to the following steps;
1) preparing materials: the raw materials are mixed according to a molar ratio of 2: 1: 0.8: 1.1: 0.6: 1.8: 0.4 respectively weighing titanium powder, aluminum powder, copper-tin alloy powder, cerium-tin alloy powder, boron-fluorine aluminum oxide powder, titanium carbide powder and colloidal graphite powder and putting into a roller ball mill;
2) mixing materials: weighing a certain amount of agate balls, and ensuring the mass ratio of the balls to the materials to be 3: 1, putting the mixture into a roller ball mill filled with raw materials for dry mixing, ball-milling the mixture for 540 minutes at the rotating speed of 450r/min, and taking out the mixture;
3) sieving: sieving the agate balls by using a sieve of 20 meshes to obtain a uniformly mixed raw material;
4) pressing: pouring the uniformly mixed raw material powder into a pre-pressing forming die, and pressing for 3 minutes under the pre-pressing pressure of 80MPa to obtain a formed blank body;
5) pressureless sintering: and (3) putting the formed blank body into a vacuum pressureless sintering furnace with a set program, and carrying out pressureless sintering in an argon protective atmosphere. The sintering temperature is 1200 ℃, the heat preservation time is 75 minutes, and the argon is used for protection. After pressureless sintering, cooling to 80 ℃, opening the furnace and taking out a sample to obtain a high-purity alloy powder block;
6) crushing and ball-milling: crushing the synthesized high-purity alloy powder block by using a crusher to obtain 60-80-mesh powder small fragments, then putting the powder small fragments into a planetary ball milling tank (an alumina tank), adding agate balls (the mass ratio of the balls to the materials is 2: 1), pouring hexafluoroisopropanol into the powder to submerge the balls, putting the powder into the planetary ball mill for further grinding and crushing, wherein the time is 580 minutes, and the rotating speed is 450 r/min;
7) drying and sieving: taking the ball material out of the planetary ball milling tank, drying the ball material in an oven at 100 ℃ for 220 minutes, cooling, sieving the agate balls by using a sieve of 20 meshes, and sieving the dried powder by using a sieve of 350 meshes;
8) pressing: putting the powder into a die cavity, pressing the powder into a brake block, wherein the molding pressure is 600Mpa +/-10 Mpa, and the molding time is 3 minutes;
9) pressure sintering: and (3) putting the formed brake block into a vacuum hot-pressing furnace with a set program, and performing secondary pressure sintering under the protection of argon. The sintering temperature is 1450 ℃, the pressure is 30MPa, and the heat preservation time is 50 minutes. And (4) after hot-pressing sintering, unloading pressure and cooling along with the furnace, and taking out a sample to obtain the high-purity high-density block material.
10) Coating: carrying out titanium aluminum nitride coating on the cleaned brake disc back plate by adopting an atmospheric plasma spraying process, wherein the process parameters are as follows: current 580A, voltage 62V, standard flow of argon 35, standard flow of hydrogen 11, spraying distance 100mm, and powder feeder speed 30%.
11) Assembling: and (4) assembling the sintered brake block and the back plate (the assembling method is the prior art).
Example 2
A preparation method of a brake disc of a heavy engineering machinery vehicle comprises the following steps:
1) preparing materials: the raw materials are mixed according to a molar ratio of 2: 1: 0.8: 1.1: 0.6: 1.8: 0.4 respectively weighing titanium powder, aluminum powder, copper-tin alloy powder, cerium-tin alloy powder, boron-fluorine aluminum oxide powder, titanium carbide powder and colloidal graphite powder and putting into a roller ball mill;
2) mixing materials: weighing a certain amount of agate balls, and ensuring the mass ratio of the balls to the materials to be 3: 1, putting the mixture into a roller ball mill filled with raw materials for dry mixing, carrying out ball milling at the rotating speed of 480r/min for 560 minutes, and taking out;
3) sieving: sieving the agate balls by using a sieve of 20 meshes to obtain a uniformly mixed raw material;
4) pressing: pouring the uniformly mixed raw material powder into a pre-pressing forming die, and pressing for 4 minutes under the pre-pressing pressure of 80MPa to obtain a formed blank body;
5) pressureless sintering: and (3) putting the formed blank body into a vacuum pressureless sintering furnace with a set program, and carrying out pressureless sintering in an argon protective atmosphere. The sintering temperature is 1220 ℃, the holding time is 80 minutes, and the argon is used for protection. After pressureless sintering, cooling to 80 ℃, opening the furnace and taking out a sample to obtain a high-purity alloy powder block;
6) crushing and ball-milling: crushing the synthesized high-purity alloy powder block by using a crusher to obtain 60-80-mesh powder small fragments, then putting the powder small fragments into a planetary ball milling tank (an alumina tank), adding agate balls (the mass ratio of the balls to the materials is 2: 1), pouring hexafluoroisopropanol into the powder to submerge the balls, putting the powder into the planetary ball mill for further grinding and crushing, wherein the time is 590 minutes, and the rotating speed is 480 r/min;
7) drying and sieving: taking the ball material out of the planetary ball milling tank, drying the ball material in an oven at 105 ℃ for 225 minutes, cooling, sieving the agate balls by using a sieve of 20 meshes, and sieving the dried powder by using a sieve of 350 meshes;
8) pressing: putting the powder into a die cavity, pressing the powder into a brake block, wherein the molding pressure is 600Mpa +/-10 Mpa, and the molding time is 4 minutes;
9) pressure sintering: and (3) putting the formed brake block into a vacuum hot-pressing furnace with a set program, and performing secondary pressure sintering under the protection of argon. The sintering temperature is 1480 ℃, the pressure is 35MPa, and the heat preservation time is 55 minutes. And (4) after hot-pressing sintering, unloading pressure and cooling along with the furnace, and taking out a sample to obtain the high-purity high-density block material.
10) Coating: carrying out titanium aluminum nitride coating on the cleaned brake disc back plate by adopting an atmospheric plasma spraying process, wherein the process parameters are as follows: current 590A, voltage 63V, standard flow of argon gas 40, standard flow of hydrogen gas 12, spraying distance 110mm, and powder feeder speed 32%.
11) Assembling: and assembling the sintered brake block and the back plate.
Example 3
The preparation method of the brake disc of the heavy engineering machinery vehicle comprises the following steps:
1) preparing materials: the raw materials are mixed according to a molar ratio of 2: 1: 0.8: 1.1: 0.6: 1.8: 0.4 respectively weighing titanium powder, aluminum powder, copper-tin alloy powder, cerium-tin alloy powder, boron-fluorine aluminum oxide powder, titanium carbide powder and colloidal graphite powder and putting into a roller ball mill;
2) mixing materials: weighing a certain amount of agate balls, and ensuring the mass ratio of the balls to the materials to be 3: 1, putting the mixture into a roller ball mill filled with raw materials for dry mixing, ball-milling the mixture for 600 minutes at the rotating speed of 500r/min, and taking out the mixture;
3) sieving: sieving the agate balls by using a sieve of 20 meshes to obtain a uniformly mixed raw material;
4) pressing: pouring the uniformly mixed raw material powder into a pre-pressing forming die, and pressing for 3-5 minutes under the pre-pressing pressure of 80MPa to obtain a formed blank body;
5) pressureless sintering: and (3) putting the formed blank body into a vacuum pressureless sintering furnace with a set program, and carrying out pressureless sintering in an argon protective atmosphere. The sintering temperature is 1250 ℃, the heat preservation time is 90 minutes, and the argon is used for protection. After pressureless sintering, cooling to 80 ℃, opening the furnace and taking out a sample to obtain a high-purity alloy powder block;
6) crushing and ball-milling: crushing the synthesized high-purity alloy powder block by using a crusher to obtain 60-80-mesh powder small fragments, then putting the powder small fragments into a planetary ball milling tank (an alumina tank), adding agate balls (the mass ratio of the balls to the materials is 2: 1), pouring hexafluoroisopropanol into the powder to submerge the balls, putting the powder into the planetary ball mill for further grinding and crushing for 600 minutes at the rotating speed of 500 r/min;
7) drying and sieving: taking the ball material out of the planetary ball milling tank, drying the ball material in an oven at the temperature of 110 ℃ for 230 minutes, cooling, sieving the agate balls by using a 20-mesh sieve, and sieving the dried powder by using a 350-mesh sieve;
8) pressing: putting the powder into a die cavity, pressing the powder into a brake block, wherein the molding pressure is 600Mpa +/-10 Mpa, and the molding time is 5 minutes;
9) pressure sintering: and (3) putting the formed brake block into a vacuum hot-pressing furnace with a set program, and performing secondary pressure sintering under the protection of argon. The sintering temperature is 1500 ℃, the pressure is 40MPa, and the heat preservation time is 60 minutes. And (4) after hot-pressing sintering, unloading pressure and cooling along with the furnace, and taking out a sample to obtain the high-purity high-density block material.
10) Coating: carrying out titanium aluminum nitride coating on the cleaned brake disc back plate by adopting an atmospheric plasma spraying process, wherein the process parameters are as follows: the current is 600A, the voltage is 65V, the standard flow of argon is 45, the standard flow of hydrogen is 13, the spraying distance is 120mm, and the speed of the powder feeder is 35%.
11) Assembling: and assembling the sintered brake block and the back plate.
The brake disc obtained by the processing method is compared and detected to obtain the following data:
and (4) conclusion: from the comparison of the friction and wear properties of the three products under different braking conditions, environments, pressures and temperatures, the brake disc of the heavy engineering machinery vehicle disclosed by the invention consists of the metal framework and the friction brake block, is superior to domestic similar products and foreign products in the performance aspects of all the products, and can meet the technical requirements of customers.
Claims (4)
1. A preparation method of a brake disc of a heavy engineering machinery vehicle comprises the following steps:
1) preparing materials: and (3) adding the following components in percentage by weight of 2: 1: 0.8: 1.1: 0.6: 1.8: respectively weighing titanium powder, aluminum powder, copper-tin alloy powder, cerium-tin alloy powder, boron-fluorine-containing aluminum oxide powder, titanium carbide powder and colloidal graphite powder in a molar ratio of 0.4, and putting the titanium powder, the aluminum powder, the copper-tin alloy powder, the cerium-tin alloy powder, the boron-fluorine-containing aluminum oxide powder, the titanium carbide powder and the colloidal graphite powder into a ball mill;
2) mixing materials: weighing a certain amount of agate balls, and ensuring the mass ratio of the balls to the materials to be 3: 1, putting the mixture into a ball mill filled with raw materials for dry mixing, ball-milling the mixture for 540 to 600 minutes at the rotating speed of 450 to 500r/min, and taking out the mixture;
3) sieving: sieving the agate balls by using a sieve to obtain a uniformly mixed raw material;
4) pressing: pouring the uniformly mixed raw material powder into a pre-pressing forming die, and pre-pressing at the pressure of 80Mpa for 3-5 minutes to obtain a formed blank body;
5) pressureless sintering: placing the formed blank body into a vacuum pressureless sintering furnace with a set program, and carrying out pressureless sintering in an argon protective atmosphere; the sintering temperature is 1200-1250 ℃, and the heat preservation time is 75-90 minutes; cooling to 80 ℃ after pressureless sintering, opening the furnace and taking out to obtain a high-purity alloy powder block;
6) crushing and ball-milling: crushing the synthesized high-purity alloy powder block to small powder blocks of 60-80 meshes by using a crusher, then putting the small powder blocks into a ball mill, adding agate balls, pouring hexafluoroisopropanol into the crushed powder blocks, further grinding and crushing, wherein the ball milling time is 580-600 minutes, and the rotating speed of the ball mill is 450-500 r/min;
7) drying and sieving: taking out the ball material from the planetary ball milling tank, airing, and then putting into an oven for drying at the temperature of 100-110 ℃ for 220-230 minutes; after cooling, sieving the agate balls by a sieve, and then sieving the dried powder by a 350-mesh fine sieve;
8) pressing: putting the powder into a die cavity and pressing the powder into a brake block, wherein the molding pressure is 600Mpa +/-10 Mpa, and the molding time is 3-5 minutes;
9) pressure sintering: placing the formed brake block into a vacuum hot-pressing furnace with a set program, and performing secondary pressure sintering under the protection of argon; the sintering temperature is 1450-1500 ℃, the pressure is 30-40 MPa, and the heat preservation time is 50-60 minutes; after hot-pressing sintering, pressure relief is carried out and furnace cooling is carried out, so as to obtain a high-purity high-density block material;
10) coating: preparing the titanium aluminum nitride coating on the brake disc back plate after cleaning treatment by adopting an atmospheric plasma spraying process, wherein the process parameters are as follows: the current is 580-600A, the voltage is 62-65V, the standard flow of argon is 35-45, the standard flow of hydrogen is 11-13, the spraying distance is 100-120 mm, and the speed of a powder feeder is 30-35%;
11) assembling: and assembling the sintered brake block and the back plate.
2. The method of manufacturing a heavy construction machinery vehicle brake disc according to claim 1, wherein: in the step 6), the mass ratio of the agate balls to the small powder fragments is 2: 1.
3. the method for manufacturing a heavy construction machinery vehicle brake disc according to claim 2, wherein: in the step 6), the hexafluoroisopropanol added should submerge the agate balls and the raw materials in the ball mill.
4. The method of manufacturing a heavy construction machinery vehicle brake disc according to claim 3, wherein: the specifications of the sieves in the step 2) and the step 7) are all 20 meshes.
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| CN202111191439.3A CN113814402A (en) | 2021-10-13 | 2021-10-13 | Preparation method of brake disc of heavy engineering machinery vehicle |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101468918A (en) * | 2007-12-28 | 2009-07-01 | 北京有色金属研究总院 | High purity zirconium boride / hafnium boride and preparation of superhigh temperature ceramic target material |
| CN109666815A (en) * | 2018-12-28 | 2019-04-23 | 西安交通大学 | A kind of MAX phase enhances the preparation method and applications of nickel-base high-temperature lubricating composite |
| CN109836157A (en) * | 2019-03-28 | 2019-06-04 | 北京交通大学 | A kind of titanium aluminium silicon-carbon solid solution block materials preparation method with high intensity and superior abrasion resistance |
| CN111172416A (en) * | 2020-01-17 | 2020-05-19 | 北京交通大学 | In-situ authigenic Cr3C2Reinforced Ni-based composite material and hot-pressing preparation method thereof |
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2021
- 2021-10-13 CN CN202111191439.3A patent/CN113814402A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101468918A (en) * | 2007-12-28 | 2009-07-01 | 北京有色金属研究总院 | High purity zirconium boride / hafnium boride and preparation of superhigh temperature ceramic target material |
| CN109666815A (en) * | 2018-12-28 | 2019-04-23 | 西安交通大学 | A kind of MAX phase enhances the preparation method and applications of nickel-base high-temperature lubricating composite |
| CN109836157A (en) * | 2019-03-28 | 2019-06-04 | 北京交通大学 | A kind of titanium aluminium silicon-carbon solid solution block materials preparation method with high intensity and superior abrasion resistance |
| CN111172416A (en) * | 2020-01-17 | 2020-05-19 | 北京交通大学 | In-situ authigenic Cr3C2Reinforced Ni-based composite material and hot-pressing preparation method thereof |
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