CN117604306A - Zirconium carbide reinforced copper-based braking material and preparation method thereof - Google Patents
Zirconium carbide reinforced copper-based braking material and preparation method thereof Download PDFInfo
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- CN117604306A CN117604306A CN202410090252.1A CN202410090252A CN117604306A CN 117604306 A CN117604306 A CN 117604306A CN 202410090252 A CN202410090252 A CN 202410090252A CN 117604306 A CN117604306 A CN 117604306A
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title claims abstract description 65
- 229910026551 ZrC Inorganic materials 0.000 title claims abstract description 53
- OTCHGXYCWNXDOA-UHFFFAOYSA-N [C].[Zr] Chemical compound [C].[Zr] OTCHGXYCWNXDOA-UHFFFAOYSA-N 0.000 title claims abstract description 53
- 239000000463 material Substances 0.000 title claims abstract description 51
- 229910052802 copper Inorganic materials 0.000 title claims abstract description 46
- 239000010949 copper Substances 0.000 title claims abstract description 46
- 238000002360 preparation method Methods 0.000 title claims abstract description 23
- 239000000843 powder Substances 0.000 claims abstract description 79
- 239000000203 mixture Substances 0.000 claims abstract description 46
- 238000005245 sintering Methods 0.000 claims abstract description 43
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 34
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 34
- 239000010439 graphite Substances 0.000 claims abstract description 34
- 238000000498 ball milling Methods 0.000 claims abstract description 33
- 238000000713 high-energy ball milling Methods 0.000 claims abstract description 26
- 239000011812 mixed powder Substances 0.000 claims abstract description 23
- 238000002156 mixing Methods 0.000 claims abstract description 23
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 21
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims abstract description 19
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 19
- 238000000034 method Methods 0.000 claims abstract description 18
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 claims abstract description 16
- 229910052982 molybdenum disulfide Inorganic materials 0.000 claims abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 16
- 229910000604 Ferrochrome Inorganic materials 0.000 claims abstract description 13
- 239000002245 particle Substances 0.000 claims abstract description 11
- 229910021383 artificial graphite Inorganic materials 0.000 claims description 15
- 229910000831 Steel Inorganic materials 0.000 claims description 12
- 239000010959 steel Substances 0.000 claims description 12
- UPHIPHFJVNKLMR-UHFFFAOYSA-N chromium iron Chemical compound [Cr].[Fe] UPHIPHFJVNKLMR-UHFFFAOYSA-N 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 6
- 238000004321 preservation Methods 0.000 claims description 4
- 239000002994 raw material Substances 0.000 claims description 3
- 239000011159 matrix material Substances 0.000 abstract description 13
- 239000000919 ceramic Substances 0.000 abstract description 2
- 239000011156 metal matrix composite Substances 0.000 abstract description 2
- 238000002490 spark plasma sintering Methods 0.000 abstract description 2
- 239000002783 friction material Substances 0.000 description 4
- 230000001050 lubricating effect Effects 0.000 description 4
- 238000009924 canning Methods 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000004663 powder metallurgy Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/04—Making non-ferrous alloys by powder metallurgy
- C22C1/05—Mixtures of metal powder with non-metallic powder
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- 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
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C9/00—Alloys based on copper
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Powder Metallurgy (AREA)
- Braking Arrangements (AREA)
Abstract
The embodiment of the invention belongs to the technical field of ceramic reinforced metal matrix composite materials, and particularly relates to a zirconium carbide reinforced copper matrix brake material and a preparation method thereof. The method comprises the following steps: uniformly mixing water atomized copper powder, carbonyl iron powder, chromium powder and low-carbon ferrochrome powder to obtain mixed powder; performing high-energy ball milling on the mixed powder to obtain first ball-milled powder; performing high-energy ball milling on the first ball milling powder to obtain second ball milling powder; adding a graphite mixture and molybdenum disulfide into the second ball-milling powder, and mixing to obtain a powder mixture; sintering the powder mixture to obtain the zirconium carbide reinforced copper-based brake material. According to the preparation method provided by the invention, zirconium carbide particles are introduced as friction components, and then the spark plasma sintering is carried out to prepare the zirconium carbide reinforced copper-based braking material, so that the characteristics of a copper matrix are not affected, and the copper-based braking material with excellent comprehensive performances such as high heat conduction, high strength, high hardness and wear resistance can be obtained.
Description
Technical Field
The invention belongs to the technical field of ceramic reinforced metal matrix composite materials, and particularly relates to a zirconium carbide reinforced copper matrix brake material and a preparation method thereof.
Background
Along with the development of science and technology, the transportation is gradually increased, in order to construct a convenient, fast, economical and efficient transportation network, the development trend of train high-speed has become one of important targets of various countries, the competition of various countries to high-speed railways is increasingly vigorous, 20 countries and regions are being built and planned to build the high-speed railways globally, the total operation mileage is more than 6 ten thousand kilometers, and the highest speed per hour can reach 350 km. With the continuous increase of the train speed, the safety problem of train braking is also widely focused, and the train braking system is required to have larger braking capability, so that higher requirements are put forward on the train braking technology. The traditional cast iron friction material and the organic synthetic friction material can not meet the requirement of high-speed train, so that most of high-speed iron brake pads are made of powder metallurgy friction materials.
The existing copper-based brake material is prepared by mainly taking copper as a matrix, adding friction components and lubricating components, and mixing and sintering. At present, al is used as copper-based brake material 2 O 3 、SiO 2 And low-density particles such as SiC are used as friction components, and the wettability with a copper matrix is poor, so that the bonding strength between the friction body and the matrix is not high, and the friction body is easy to peel off during high-speed braking, thereby increasing abrasion. With the increase of the speed of the high-speed train, the instantaneous highest temperature on the friction surface during braking can reach 900 ℃ or even higher, and the friction material is easy to fall off, crack, unstable friction coefficient and the like at high temperature.
Most of the existing copper-based brake materials have poor heat conduction performance due to high porosity. At high speed braking of a train, a great amount of heat generated by friction may soften copper of a friction surface so that a friction coefficient is lowered, and thus a material having a stable friction coefficient and excellent heat conductive properties is urgently needed to satisfy the friction properties at high speed braking.
Disclosure of Invention
The invention mainly aims to provide a zirconium carbide reinforced copper-based brake material and a preparation method thereof, so as to overcome the defects in the prior art.
In order to achieve the purpose of the invention, the technical scheme adopted by the invention comprises the following steps:
according to a first aspect of an embodiment of the present invention, there is provided a method for preparing a zirconium carbide reinforced copper-based brake material, comprising the steps of:
s1, uniformly mixing water atomized copper powder, carbonyl iron powder, chromium powder and low-carbon ferrochrome powder to obtain mixed powder;
s2, mixing the mixed powder with steel balls, then loading the mixed powder into a ball milling tank, and performing high-energy ball milling to obtain first ball milling powder;
s3, adding zirconium carbide powder into a ball milling tank filled with the first ball milling powder at room temperature, and performing high-energy ball milling to obtain second ball milling powder;
s4, placing the second ball-milling powder into a mixer, adding a graphite mixture and molybdenum disulfide into the mixer, and mixing to obtain a powder mixture;
and S5, placing the graphite mold filled with the powder mixture into a sintering furnace for sintering, and cooling to room temperature after the sintering is completed to obtain the zirconium carbide reinforced copper-based brake material.
Further, in step S1, the particle size of the water atomized copper powder is 10 μm; the granularity of the carbonyl iron powder is 5 mu m; the granularity of the chromium powder is 15 mu m; the granularity of the low-carbon ferrochrome powder is 15 mu m; the purities of the water atomized copper powder, the carbonyl iron powder, the chromium powder and the low-carbon chromium iron powder are all more than 99.9 percent.
Further, in the step S2, the ball-to-material ratio of the steel ball to the mixed powder is 2:1; the volume of the mixed powder mixed with the steel balls is less than 50% of the volume of the ball milling tank.
Further, in step S2, the high-energy ball milling comprises the step of performing high-energy ball milling for 2 hours at room temperature at a rotating speed of 500r/min, so as to obtain first ball milling powder with an average particle size of 2 mu m.
Further, in step S3, the zirconium carbide powder has a particle size of 2 μm; the high-energy ball milling comprises the step of performing high-energy ball milling for 1 hour at room temperature at the rotating speed of 500 rpm, so as to obtain second ball milling powder.
Further, in step S4, the graphite mixture includes artificial graphite and natural crystalline flake graphite, and the mixing mass ratio of the artificial graphite to the natural crystalline flake graphite is 9:1.
further, in the step S4, the granularity of the artificial graphite is 2 mu m, the granularity of the natural crystalline flake graphite is 200 mu m, and the granularity of the molybdenum disulfide is 5 mu m.
Further, in step S4, the rotational speed of the mixer is 50r/min, and the mixture is mixed for 1h.
Further toIn step S5, the sintering furnace is a discharge plasma sintering furnace, the sintering temperature in the sintering furnace is 850-950 ℃, the sintering pressure is 40MPa, the heating rate is 60 ℃/min, the heat preservation and pressure maintaining time is 5min, and the vacuum degree is 10 -4 Pa。
According to a second aspect of the embodiment of the invention, there is provided a zirconium carbide reinforced copper-based brake material prepared by the method, and the raw materials for preparing the zirconium carbide reinforced copper-based brake material comprise the following components in parts by weight: 30 parts of water atomized copper powder, 20 parts of carbonyl iron powder, 2 parts of chromium powder, 1 part of low-carbon chromium iron powder, 5 parts of zirconium carbide powder, 10 parts of graphite mixture and 3 parts of molybdenum disulfide.
Compared with the prior art, the invention has the advantages that:
the embodiment of the invention provides a zirconium carbide reinforced copper-based braking material and a preparation method thereof, wherein zirconium carbide particles are introduced as friction components, and the zirconium carbide reinforced copper-based braking material is prepared through spark plasma sintering, so that the characteristics of a copper matrix are not affected, and the copper-based braking material with excellent comprehensive performances such as high heat conduction, high strength, high hardness and wear resistance can be obtained. Meanwhile, the preparation method of the invention has the advantages of simple process and short preparation period.
Detailed Description
In view of the shortcomings in the prior art, the inventor of the present invention has long studied and practiced in a large number of ways to propose the technical scheme of the present invention. The technical scheme, the implementation process, the principle and the like are further explained as follows.
The following detailed description of the invention is provided in connection with the accompanying drawings that are presented to illustrate the invention and not to limit the scope thereof. The examples provided below are intended as guidelines for further modifications by one of ordinary skill in the art and are not to be construed as limiting the invention in any way.
The experimental methods in the following examples, unless otherwise specified, are conventional methods, and are carried out according to techniques or conditions described in the literature in the field or according to the product specifications. Materials, reagents and the like used in the examples described below are commercially available unless otherwise specified.
The embodiment of the invention provides a preparation method of a zirconium carbide reinforced copper-based braking material, which comprises the following steps:
s1, uniformly mixing water atomized copper powder, carbonyl iron powder, chromium powder and low-carbon ferrochrome powder to obtain mixed powder; the granularity of the water atomized copper powder is 10 mu m; the granularity of the carbonyl iron powder is 5 mu m; the granularity of the chromium powder is 15 mu m; the granularity of the low-carbon ferrochrome powder is 15 mu m; the purities of the water atomized copper powder, the carbonyl iron powder, the chromium powder and the low-carbon chromium iron powder are all more than 99.9 percent.
S2, mixing the mixed powder with steel balls, then loading the mixed powder into a ball milling tank, and performing high-energy ball milling to obtain first ball milling powder; the ball-material ratio of the steel ball to the mixed powder is 2:1; the volume of the mixed powder after being mixed with the steel balls is less than 50% of the volume of the ball milling tank; the high-energy ball milling comprises the step of performing high-energy ball milling for 2 hours at room temperature at a rotating speed of 500r/min to obtain first ball milling powder with an average particle size of 2 mu m.
S3, adding zirconium carbide powder into a ball milling tank filled with the first ball milling powder at room temperature, and performing high-energy ball milling to obtain second ball milling powder; the granularity of the zirconium carbide powder is 2 mu m; the high-energy ball milling comprises the step of performing high-energy ball milling for 1 hour at room temperature at the rotating speed of 500 rpm, so as to obtain second ball milling powder.
S4, placing the second ball-milling powder into a mixer, adding a graphite mixture and molybdenum disulfide into the mixer, and mixing to obtain a powder mixture; the graphite mixture comprises artificial graphite and natural crystalline flake graphite, and the mixing mass ratio of the artificial graphite to the natural crystalline flake graphite is 9:1, a step of; the granularity of the artificial graphite is 2 mu m, the granularity of the natural crystalline flake graphite is 200 mu m, and the granularity of the molybdenum disulfide is 5 mu m; the rotating speed of the mixer is 50r/min, and the mixing is carried out for 1h.
And S5, placing the graphite mold filled with the powder mixture into a sintering furnace for sintering, and cooling to room temperature after the sintering is completed to obtain the zirconium carbide reinforced copper-based brake material. In a specific implementation, the sintering furnace is discharge or the likeThe ion sintering furnace has a sintering temperature of 850 ℃, a sintering pressure of 40MPa, a heating rate of 60 ℃/min, a heat preservation time and a pressure maintaining time of 5min and a vacuum degree of 10 -4 Pa。
In addition, the invention also provides a zirconium carbide reinforced copper-based braking material, which is prepared from the following raw materials in parts by weight: 30 parts of water atomized copper powder, 20 parts of carbonyl iron powder, 2 parts of chromium powder, 1 part of low-carbon chromium iron powder, 5 parts of zirconium carbide powder, 10 parts of graphite mixture and 3 parts of molybdenum disulfide.
The invention is described in detail below with reference to specific examples:
example 1
The preparation method of the zirconium carbide reinforced copper-based brake material provided by the embodiment comprises the following steps:
1) Preparation of a matrix: the method comprises the steps of taking water atomized copper powder with the granularity of 10 mu m, carbonyl iron powder with the granularity of 5 mu m, chromium powder with the granularity of 15 mu m and low-carbon ferrochrome powder with the granularity of 15 mu m with the purity of more than 99.9% as matrix parts, primarily mixing the above-mentioned powder uniformly, canning with steel balls with the ball-to-material ratio of 2:1 and the mixed powder, carrying out high-energy ball milling for 2 hours at the room temperature at the rotating speed of 500 rpm to obtain mixed powder with the average granularity of 2 mu m for standby; wherein the copper powder accounts for 30 percent of the total composition, the carbonyl iron powder accounts for 20 percent of the total composition, the chromium powder accounts for 2 percent of the total composition, and the low-carbon ferrochrome powder accounts for 1 percent of the total composition;
2) Preparation of friction components: continuously adding 5% of zirconium carbide powder into a ball milling tank at room temperature, and performing high-energy ball milling for 1 hour at a rotating speed of 500 revolutions per minute to obtain a powder mixture for later use; wherein the granularity of the zirconium carbide powder is 2 mu m;
3) Preparation of lubricating components: placing the powder mixture prepared in the second step into a V-shaped mixer, and then adding graphite mixture (the artificial graphite and the natural crystalline flake graphite are mixed at a ratio of 9:1) to account for 10 percent of the total components, and mixing molybdenum disulfide to account for 3 percent of the total components for 1 hour at a rotating speed of 50 revolutions per minute to obtain the powder mixture, wherein the granularity of the artificial graphite is 2 mu m, the granularity of the natural crystalline flake graphite is 200 mu m, and the granularity of the molybdenum disulfide is 5 mu m;
4) And (3) sintering: placing the powder mixture into a graphite mold, placing the filled mold into a discharge plasma sintering furnace for sintering and forming, wherein the sintering temperature is 850 ℃, the sintering pressure is 40MPa, the heating rate is 60 ℃/min, the heat preservation and pressure maintaining time is 5min, and the vacuum degree is 10 -4 Pa, cooling to room temperature along with the furnace after sintering is completed, and obtaining the zirconium carbide particle reinforced copper-based brake material.
Example 2
The preparation method of the zirconium carbide reinforced copper-based brake material provided by the embodiment comprises the following steps:
1) Preparation of a matrix: the method comprises the steps of taking water atomized copper powder with the granularity of 10 mu m, carbonyl iron powder with the granularity of 5 mu m, chromium powder with the granularity of 15 mu m and low-carbon ferrochrome powder with the granularity of 15 mu m with the purity of more than 99.9% as matrix parts, primarily mixing the above-mentioned powder uniformly, canning with steel balls with the ball-to-material ratio of 2:1 and the mixed powder, carrying out high-energy ball milling for 2 hours at the room temperature at the rotating speed of 500 rpm to obtain mixed powder with the average granularity of 2 mu m for standby; wherein the copper powder accounts for 30 percent of the total composition, the carbonyl iron powder accounts for 20 percent of the total composition, the chromium powder accounts for 2 percent of the total composition, and the low-carbon ferrochrome powder accounts for 1 percent of the total composition;
2) Preparation of friction components: continuously adding 5% of zirconium carbide powder into a ball milling tank at room temperature, and performing high-energy ball milling for 1 hour at a rotating speed of 500 revolutions per minute to obtain a powder mixture for later use; wherein the granularity of the zirconium carbide powder is 2 mu m;
3) Preparation of lubricating components: placing the powder mixture prepared in the second step into a V-shaped mixer, and then adding graphite mixture (the artificial graphite and the natural crystalline flake graphite are mixed at a ratio of 9:1) to account for 10 percent of the total components, and mixing molybdenum disulfide to account for 3 percent of the total components for 1 hour at a rotating speed of 50 revolutions per minute to obtain the powder mixture, wherein the granularity of the artificial graphite is 2 mu m, the granularity of the natural crystalline flake graphite is 200 mu m, and the granularity of the molybdenum disulfide is 5 mu m;
4) And (3) sintering: placing the powder mixture into graphite mold, and fillingPlacing the filled mold into a discharge plasma sintering furnace for sintering and forming, wherein the sintering temperature is 900 ℃, the sintering pressure is 40MPa, the heating rate is 60 ℃/min, the heat and pressure maintaining time is 5min, and the vacuum degree is 10 -4 Pa, cooling to room temperature along with the furnace after sintering is completed, and obtaining the zirconium carbide particle reinforced copper-based brake material.
Example 3
The preparation method of the zirconium carbide reinforced copper-based brake material provided by the embodiment comprises the following steps:
1) Preparation of a matrix: the method comprises the steps of taking water atomized copper powder with the granularity of 10 mu m, carbonyl iron powder with the granularity of 5 mu m, chromium powder with the granularity of 15 mu m and low-carbon ferrochrome powder with the granularity of 15 mu m with the purity of more than 99.9% as matrix parts, primarily mixing the above-mentioned powder uniformly, canning with steel balls with the ball-to-material ratio of 2:1 and the mixed powder, carrying out high-energy ball milling for 2 hours at the room temperature at the rotating speed of 500 rpm to obtain mixed powder with the average granularity of 2 mu m for standby; wherein the copper powder accounts for 30 percent of the total composition, the carbonyl iron powder accounts for 20 percent of the total composition, the chromium powder accounts for 2 percent of the total composition, and the low-carbon ferrochrome powder accounts for 1 percent of the total composition;
2) Preparation of friction components: continuously adding 5% of zirconium carbide powder into a ball milling tank at room temperature, and performing high-energy ball milling for 1 hour at a rotating speed of 500 revolutions per minute to obtain a powder mixture for later use; wherein the granularity of the zirconium carbide powder is 2 mu m;
3) Preparation of lubricating components: placing the powder mixture prepared in the second step into a V-shaped mixer, and then adding graphite mixture (the artificial graphite and the natural crystalline flake graphite are mixed at a ratio of 9:1) to account for 10 percent of the total components, and mixing molybdenum disulfide to account for 3 percent of the total components for 1 hour at a rotating speed of 50 revolutions per minute to obtain the powder mixture, wherein the granularity of the artificial graphite is 2 mu m, the granularity of the natural crystalline flake graphite is 200 mu m, and the granularity of the molybdenum disulfide is 5 mu m;
4) And (3) sintering: placing the powder mixture into a graphite mold, placing the filled mold into a discharge plasma sintering furnace for sintering and forming, wherein the sintering temperature is 950 ℃, the sintering pressure is 40MPa, the heating rate is 60 ℃/min, and the heat and pressure are maintained5min, vacuum degree 10 -4 Pa, cooling to room temperature along with the furnace after sintering is completed, and obtaining the zirconium carbide particle reinforced copper-based brake material.
Performance tests of the zirconium carbide reinforced copper-based brake materials prepared in the above examples 1 to 3 are carried out, wherein the performance tests comprise average friction coefficient, abrasion loss, friction coefficient stability, brinell hardness and compactness, and the test results are shown in the following table 1.
TABLE 1
The result shows that the zirconium carbide reinforced copper-based brake material prepared by the invention has good wear resistance, strength and hardness.
While only certain embodiments of the present invention have been described, it will be apparent to those skilled in the art that other modifications and improvements can be made without departing from the inventive concept of the present invention.
Claims (10)
1. The preparation method of the zirconium carbide reinforced copper-based brake material is characterized by comprising the following steps of:
s1, uniformly mixing water atomized copper powder, carbonyl iron powder, chromium powder and low-carbon ferrochrome powder to obtain mixed powder;
s2, mixing the mixed powder with steel balls, then loading the mixed powder into a ball milling tank, and performing high-energy ball milling to obtain first ball milling powder;
s3, adding zirconium carbide powder into a ball milling tank filled with the first ball milling powder at room temperature, and performing high-energy ball milling to obtain second ball milling powder;
s4, placing the second ball-milling powder into a mixer, adding a graphite mixture and molybdenum disulfide into the mixer, and mixing to obtain a powder mixture;
and S5, placing the graphite mold filled with the powder mixture into a sintering furnace for sintering, and cooling to room temperature after the sintering is completed to obtain the zirconium carbide reinforced copper-based brake material.
2. The method for preparing the zirconium carbide reinforced copper-based brake material according to claim 1, wherein: in the step S1, the granularity of the water atomized copper powder is 10 mu m; the granularity of the carbonyl iron powder is 5 mu m; the granularity of the chromium powder is 15 mu m; the granularity of the low-carbon ferrochrome powder is 15 mu m; the purities of the water atomized copper powder, the carbonyl iron powder, the chromium powder and the low-carbon chromium iron powder are all more than 99.9 percent.
3. The method for preparing the zirconium carbide reinforced copper-based brake material according to claim 1, wherein: in the step S2, the ball-material ratio of the steel ball to the mixed powder is 2:1; the volume of the mixed powder mixed with the steel balls is less than 50% of the volume of the ball milling tank.
4. The method for preparing the zirconium carbide reinforced copper-based brake material according to claim 1, wherein: in step S2, the high-energy ball milling comprises the step of performing high-energy ball milling for 2 hours at room temperature at a rotating speed of 500r/min, so as to obtain first ball milling powder with an average particle size of 2 mu m.
5. The method for preparing the zirconium carbide reinforced copper-based brake material according to claim 1, wherein: in the step S3, the granularity of the zirconium carbide powder is 2 mu m; the high-energy ball milling comprises the step of performing high-energy ball milling for 1 hour at room temperature at the rotating speed of 500 rpm, so as to obtain second ball milling powder.
6. The method for preparing the zirconium carbide reinforced copper-based brake material according to claim 1, wherein: in the step S4, the graphite mixture includes artificial graphite and natural crystalline flake graphite, and the mixing mass ratio of the artificial graphite to the natural crystalline flake graphite is 9:1.
7. the method for preparing the zirconium carbide reinforced copper-based brake material according to claim 6, wherein: in the step S4, the granularity of the artificial graphite is 2 mu m, the granularity of the natural crystalline flake graphite is 200 mu m, and the granularity of the molybdenum disulfide is 5 mu m.
8. The method for preparing the zirconium carbide reinforced copper-based brake material according to claim 1, wherein: in the step S4, the rotating speed of the mixer is 50r/min, and the mixing is carried out for 1h.
9. The method for preparing the zirconium carbide reinforced copper-based brake material according to claim 1, wherein: in the step S5, the sintering furnace is a discharge plasma sintering furnace, the sintering temperature in the sintering furnace is 850-950 ℃, the sintering pressure is 40MPa, the heating rate is 60 ℃/min, the heat preservation and pressure maintaining time is 5min, and the vacuum degree is 10 -4 Pa。
10. A zirconium carbide reinforced copper-based brake material prepared by the method of any one of claims 1 to 9, wherein the raw materials for preparing the zirconium carbide reinforced copper-based brake material comprise the following components in parts by weight: 30 parts of water atomized copper powder, 20 parts of carbonyl iron powder, 2 parts of chromium powder, 1 part of low-carbon chromium iron powder, 5 parts of zirconium carbide powder, 10 parts of graphite mixture and 3 parts of molybdenum disulfide.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10310832A (en) * | 1997-05-09 | 1998-11-24 | Kubota Corp | Wear resistant composite material excellent in sliding characteristic |
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| CN109722560A (en) * | 2018-12-03 | 2019-05-07 | 江西理工大学 | A kind of ZrC Reinforced Cu-Fe based composites and preparation method thereof |
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2024
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| JPH10310832A (en) * | 1997-05-09 | 1998-11-24 | Kubota Corp | Wear resistant composite material excellent in sliding characteristic |
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| CN108103348A (en) * | 2016-11-25 | 2018-06-01 | 胡威 | A kind of copper-based wear-resistant material available for high-speed train braking |
| CN107760898A (en) * | 2017-10-20 | 2018-03-06 | 渭南高新区火炬科技发展有限责任公司 | Preparation method of copper-based composite material |
| CN109385586A (en) * | 2018-11-15 | 2019-02-26 | 北京科技大学 | A kind of preparation method of powder metallurgy friction material and friction block |
| CN109722560A (en) * | 2018-12-03 | 2019-05-07 | 江西理工大学 | A kind of ZrC Reinforced Cu-Fe based composites and preparation method thereof |
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