CN112553534B - Preparation method of copper-iron-based friction material - Google Patents
Preparation method of copper-iron-based friction material Download PDFInfo
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- 239000002783 friction material Substances 0.000 title claims abstract description 40
- IYRDVAUFQZOLSB-UHFFFAOYSA-N copper iron Chemical compound [Fe].[Cu] IYRDVAUFQZOLSB-UHFFFAOYSA-N 0.000 title claims abstract description 22
- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- 239000010949 copper Substances 0.000 claims abstract description 58
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 57
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 42
- 229910052802 copper Inorganic materials 0.000 claims abstract description 42
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 30
- 239000010439 graphite Substances 0.000 claims abstract description 30
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 29
- 238000005245 sintering Methods 0.000 claims abstract description 16
- 239000000843 powder Substances 0.000 claims description 80
- 239000011651 chromium Substances 0.000 claims description 29
- 239000011572 manganese Substances 0.000 claims description 23
- 238000010438 heat treatment Methods 0.000 claims description 18
- 239000002245 particle Substances 0.000 claims description 16
- 238000002156 mixing Methods 0.000 claims description 12
- 238000004519 manufacturing process Methods 0.000 claims description 8
- 239000002994 raw material Substances 0.000 claims description 7
- 238000007605 air drying Methods 0.000 claims description 6
- 238000004140 cleaning Methods 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 6
- 238000007731 hot pressing Methods 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 6
- 238000004321 preservation Methods 0.000 claims description 6
- 238000003825 pressing Methods 0.000 claims description 6
- 238000005303 weighing Methods 0.000 claims description 6
- 238000009713 electroplating Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 5
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 3
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 3
- 239000011159 matrix material Substances 0.000 abstract description 12
- 238000000034 method Methods 0.000 abstract description 9
- 238000004663 powder metallurgy Methods 0.000 abstract description 9
- 239000002131 composite material Substances 0.000 abstract description 8
- 230000001050 lubricating effect Effects 0.000 abstract description 8
- 238000005728 strengthening Methods 0.000 abstract description 6
- 239000000956 alloy Substances 0.000 abstract description 5
- 229910045601 alloy Inorganic materials 0.000 abstract description 5
- 229910052804 chromium Inorganic materials 0.000 abstract description 3
- 229910052748 manganese Inorganic materials 0.000 abstract description 3
- 230000007547 defect Effects 0.000 abstract description 2
- 238000005457 optimization Methods 0.000 abstract description 2
- 238000009827 uniform distribution Methods 0.000 abstract description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 22
- 238000001514 detection method Methods 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 229910052759 nickel Inorganic materials 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 238000012876 topography Methods 0.000 description 2
- 229910000570 Cupronickel Inorganic materials 0.000 description 1
- YOCUPQPZWBBYIX-UHFFFAOYSA-N copper nickel Chemical compound [Ni].[Cu] YOCUPQPZWBBYIX-UHFFFAOYSA-N 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 229910000765 intermetallic Inorganic materials 0.000 description 1
- UGKDIUIOSMUOAW-UHFFFAOYSA-N iron nickel Chemical compound [Fe].[Ni] UGKDIUIOSMUOAW-UHFFFAOYSA-N 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/02—Making ferrous alloys by powder metallurgy
- C22C33/0257—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements
- C22C33/0264—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements the maximum content of each alloying element not exceeding 5%
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/02—Making ferrous alloys by powder metallurgy
- C22C33/0257—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements
- C22C33/0278—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements with at least one alloying element having a minimum content above 5%
- C22C33/0292—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements with at least one alloying element having a minimum content above 5% with more than 5% preformed carbides, nitrides or borides
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
Abstract
The invention provides a preparation method of a copper-iron-based friction material, and belongs to the technical field of preparation of brake friction composite materials. 1 to 3 weight percent of strengthening component Ni, 0.5 to 1 weight percent of alloy component Mn and Cr, 2 to 6 weight percent of friction component WC and 4 to 10 weight percent of lubricating component copper-clad graphite are added into a copper-clad iron powder matrix, and the low-wear copper-iron based friction material for braking is prepared by a powder metallurgy method. The copper-clad graphite is used as a lubricating component instead of graphite powder, the defect of poor wettability of copper and graphite is effectively overcome in the sintering process, the graphite can be uniformly distributed in the whole friction material, and the obtained powder metallurgy copper-iron friction material has low porosity and uniform distribution through component optimization design and process exploration, so that the friction material has the characteristics of high strength, low wear rate and stable friction coefficient.
Description
Technical Field
The invention relates to the technical field of preparation of brake friction materials, and particularly provides a preparation method of a copper-iron-based friction material.
Background
The working principle of the friction material is that in various braking devices, the tribological property of the friction material is utilized to convert kinetic energy into heat energy or other forms of energy, so that the rotating device is braked. The powder metallurgy friction material is a friction material which is prepared by taking metal or alloy as a matrix, adding a strengthening component, a lubricating component and a friction component and applying a powder metallurgy technology. The method is widely used for manufacturing friction plates of friction clutches and friction brakes. The friction material prepared by the powder metallurgy technology has the advantages of relatively easy control of porosity, basically one-step forming, stable friction coefficient, excellent thermal conductivity, good running-in performance, small environmental pollution, long service life and the like.
At present, the powder metallurgy copper-based friction material has wide application prospect in the fields of transportation, aerospace, military industry, national defense and the like due to the advantages of high heat conductivity coefficient, stable friction, low abrasion loss and the like. However, the copper-based powder metallurgy friction material still has the problems of higher manufacturing cost, low hardness, low density after sintering, high wear rate and the like, and is particularly applied to the aspect of high-speed rail train braking materials. At present, the carbon content of the powder metallurgy copper-iron based friction material is low, the tribological performance and the lubricating performance of the friction material are poor, and simultaneously, because copper and carbon are not wetted with each other, the interface bonding of the two materials is poor, so that the continuity of a matrix is reduced, the strength is reduced, and the abrasion is increased.
Disclosure of Invention
In order to solve the problems, the invention provides a preparation method of a copper-iron-based friction material.
The invention has the following inventive concept: the inventor starts from adjusting the properties of raw material powder to improve the wettability of the powder, carbon is directly added into a matrix material in a graphite form under normal conditions, and excessive graphite can divide an alloy matrix to increase the porosity of the material, so that when a lubricating component adopts copper-clad graphite to replace graphite with poor wettability with copper, the matrix strength of a friction material can be improved, and the friction and wear performance of a copper-iron-based friction material can be effectively improved.
The preparation method of the brake copper-iron-based composite friction material provided by the invention is characterized in that electroplating copper-clad iron powder is used as a matrix, a strengthening component Ni, a friction component WC, a lubricating component electroplating copper-clad graphite (flaky graphite) and alloy components Mn and Cr are added, and the copper-iron composite friction material is prepared by utilizing the good wettability of the copper-clad graphite and the copper-clad iron in the sintering process; the copper-clad iron powder is prepared by adopting an electroplating mode, the mass fraction of copper element is 25%, and the mass fraction of iron is 75%; the strengthening component Ni and the matrix copper-clad iron matrix form a high-temperature-resistant and high-strength copper-nickel and iron-nickel intermetallic compound, so that the matrix strength is improved; the alloy components Mn and Cr and the matrix form a high-strength solid solution strengthening matrix; the copper-clad graphite is prepared by adopting an electroplating mode, a copper-clad layer on the surface of the flake graphite has a three-dimensional reticular structure, the mass fraction of copper element is 50%, and the mass fraction of graphite is 50%. The copper-clad graphite is used as a lubricating component instead of graphite powder, the defect of poor wettability of copper and graphite is effectively overcome in the sintering process, the graphite can be uniformly distributed in the whole friction material, and the obtained powder metallurgy copper-iron friction material has low porosity and uniform distribution through component optimization design and process exploration, so that the friction material has the characteristics of high strength, low wear rate and stable friction coefficient.
The specific process steps for preparing the brake copper-iron composite friction material are as follows:
firstly, selecting original and auxiliary powder materials;
copper coated iron powder (Fe-25Cu) (particle size < 75 μm, W)Cu＝25％)；
Ni powder (particle size less than 75 μm, W)Ni＞99.9％)；
Mn powder (grain size less than 100 μm, W)Mn＞99.9％)；
Cr powder (grain size less than 100 μm, W)Cr＞99.9％)；
WC powder (grain size less than 50 μm, W)WC＞99.9％)；
Copper-coated graphite powder (particle size less than 75 μm, W)Cu＝50％)；
Secondly, designing the mass ratio of 2-6 wt% of WC powder; ni powder: 1wt% -3 wt%; mn powder and Cr powder: 0.5wt% -1 wt%; copper-coated graphite powder: 4-10 wt% of copper-clad iron powder, and the balance of copper-clad iron powder; wherein the copper-coated graphite powder graphite is flake graphite.
Weighing the raw materials according to the mixture ratio, firstly putting the copper-coated iron powder, the Ni powder, the WC powder, the Mn powder and the Cr powder into a planetary high-energy ball mill for mixing for 5-8 hours, and then putting the copper-coated graphite powder into the planetary high-energy ball mill for mixing for 5 hours;
fourthly, cold-pressing the powder into a cylindrical green compact with the diameter of 20mm and the thickness of 2mm under the pressure of 800MPa-1000 MPa;
fifthly, putting the cold blank into a hot vacuum hot pressing sintering furnace for sintering, wherein the pressure is 200 MPa; the heating speed is 50 ℃/min-100 ℃/min, and when the temperature reaches 1100 ℃, the heating is stopped after the heating and heat preservation is carried out for 2 h; cooling to room temperature along with the furnace;
sixthly, taking out the sample, ultrasonically cleaning and then air-drying;
and seventhly, detecting the performance of the sample.
Further, in the second step, the mass ratio of the manganese powder to the chromium powder is 1: 1.
The preparation method of the brake copper-iron composite friction material has the advantages that: the copper-clad graphite powder is adopted to replace the traditional graphite powder, so that the wettability of copper-clad iron powder and the graphite powder is improved, the prepared friction material copper-clad layer has a fine spatial three-dimensional network structure, the overall strength of the copper-iron friction material is improved together with a strengthening component Ni, and in the friction and wear process, the graphite coated in the copper can be stripped out and a lubricating film is formed on the friction surface, so that the severe wear between the friction material and a mating part is prevented. The friction material has fewer and smaller pores, and the pores are distributed more uniformly. The brake copper-iron composite friction material prepared by the invention has the Hardness (HRC) of 60-90, the friction coefficient of 0.30-0.45 and the wear rate (multiplied by 10)-10g/N.m)2.5-5.0, and has the characteristics of high strength, low wear rate and stable friction coefficient.
Drawings
FIG. 1 is a surface topography of the copper-iron composite friction material of the present invention.
Detailed Description
The invention is described in more detail below with reference to specific examples, without limiting the scope of the invention. In the following examples, the Fe content in copper-clad iron powder (Fe-25Cu) is 75 wt%, and the Cu content is 25 wt%; the Cu content in the copper-coated graphite powder is 50 wt%, and the graphite content is 50 wt%.
Example 1
The manufacturing process comprises the following steps:
copper coated iron powder (Fe-25Cu) (particle size < 75 μm, W)Cu＝25％)；
Ni powder (particle size less than 75 μm, W)Ni＞99.9％)；
Mn powder (grain size less than 100 μm, W)Mn＞99.9％)；
Cr powder (grain size less than 100 μm, W)Cr＞99.9％)；
WC powder (grain size less than 50 μm, W)WC＞99.9％)；
Copper-coated graphite powder (flake graphite) (particle size < 75 μm, W)Cu＝50％)；
Secondly, designing the mass ratio of 2wt% of WC and Ni: 1 wt%; mn powder and Cr powder (the mass ratio of the Mn powder to the Cr powder is 1: 1): 0.5 wt%; copper-coated graphite: 4wt%, Fe-25 Cu: 92.5 wt%.
Weighing the raw materials according to the mixture ratio, firstly putting the copper-coated iron powder, the Ni powder, the WC powder, the Mn powder and the Cr powder into a planetary high-energy ball mill for mixing for 5-8 hours, and then putting the copper-coated graphite powder into the planetary high-energy ball mill for mixing for 5 hours;
fourthly, cold-pressing the powder into a cylindrical green compact with the diameter of 20mm and the thickness of 2mm under the pressure of 800MPa-1000 MPa;
fifthly, putting the cold blank into a hot vacuum hot pressing sintering furnace for sintering, wherein the pressure is 200 MPa; the heating speed is 50 ℃/min-100 ℃/min, and when the temperature reaches 1100 ℃, the heating is stopped after the heating and heat preservation is carried out for 2 h; cooling to room temperature along with the furnace;
sixthly, taking out the sample, ultrasonically cleaning and then air-drying;
the detection result is as follows: hardness HRC70, friction coefficient 0.50, wear rate 5.5X 10-10g/N.m。
As shown in fig. 1, which is a surface topography of the copper-iron composite friction material of the embodiment, it can be known that the porosity of the copper-iron friction material is low and uniformly distributed, and the copper plating layer on the graphite surface of the friction material has a fine three-dimensional network structure.
Example 2
The manufacturing process comprises the following steps:
copper coated iron powder (Fe-25Cu) (particle size < 75 μm, W)Cu＝25％)；
Ni powder (particle size less than 75 μm, W)Ni＞99.9％)；
Mn powder (grain size less than 100 μm, W)Mn＞99.9％)；
Cr powder (grain size less than 100 μm, W)Cr＞99.9％)；
WC powder (grain size less than 50 μm, W)WC＞99.9％)；
Copper-coated graphite powder (flake graphite) (particle size < 75 μm, W)Cu＝50％)；
Step two, designing the mass ratio of WC to 6wt%, Ni: 3 wt%; mn powder and Cr powder (the mass ratio of the Mn powder to the Cr powder is 1: 1): 1 wt%; copper-coated graphite: 10wt%, Fe-25 Cu: 80 wt%.
Weighing the raw materials according to the mixture ratio, firstly putting the copper-coated iron powder, the Ni powder, the WC powder, the Mn powder and the Cr powder into a planetary high-energy ball mill for mixing for 5-8 hours, and then putting the copper-coated graphite powder into the planetary high-energy ball mill for mixing for 5 hours;
fourthly, cold-pressing the powder into a cylindrical green compact with the diameter of 20mm and the thickness of 2mm under the pressure of 800MPa-1000 MPa;
fifthly, putting the cold blank into a hot vacuum hot pressing sintering furnace for sintering, wherein the pressure is 200 MPa; the heating speed is 50 ℃/min-100 ℃/min, and when the temperature reaches 1100 ℃, the heating is stopped after the heating and heat preservation is carried out for 2 h; cooling to room temperature along with the furnace;
sixthly, taking out the sample, ultrasonically cleaning and then air-drying;
the detection result is as follows: hardness HRC80, friction coefficient 0.55, wear rate 4.5X 10-10g/N.m。
Example 3
The manufacturing process comprises the following steps:
copper coated iron powder (Fe-25Cu) (particle size < 75 μm, W)Cu＝25％)；
Ni powder (particle size less than 75 μm, W)Ni＞99.9％)；
Mn powder (grain size less than 100 μm, W)Mn＞99.9％)；
Cr powder (grain size less than 100 μm, W)Cr＞99.9％)；
WC powder (grain size less than 50 μm, W)WC＞99.9％)；
Copper-coated graphite powder (flake graphite) (particle size < 75 μm, W)Cu＝50％)；
And step two, designing the mass ratio of 4wt% of WC and Ni: 2 wt%; mn powder and Cr powder (the mass ratio of the Mn powder to the Cr powder is 1: 1): 0.5 wt%; copper-coated graphite: 6wt%, Fe-25 Cu: 87.5 wt%.
Weighing the raw materials according to the mixture ratio, firstly putting the copper-coated iron powder, the Ni powder, the WC powder, the Mn powder and the Cr powder into a planetary high-energy ball mill for mixing for 5-8 hours, and then putting the copper-coated graphite powder into the planetary high-energy ball mill for mixing for 5 hours;
fourthly, cold-pressing the powder into a cylindrical green compact with the diameter of 20mm and the thickness of 2mm under the pressure of 800MPa-1000 MPa;
fifthly, putting the cold blank into a hot vacuum hot pressing sintering furnace for sintering, wherein the pressure is 200 MPa; the heating speed is 50 ℃/min-100 ℃/min, and when the temperature reaches 1100 ℃, the heating is stopped after the heating and heat preservation is carried out for 2 h; cooling to room temperature along with the furnace;
sixthly, taking out the sample, ultrasonically cleaning and then air-drying;
the detection result is as follows: hardness HRC90, friction coefficient 0.45, wear rate 4.0X 10-10g/N.m。
Example 4
The manufacturing process comprises the following steps:
copper coated iron powder (Fe-25Cu) (particle size < 75 μm, W)Cu＝25％)；
Ni powder (particle size less than 75 μm, W)Ni＞99.9％)；
Mn powder (grain size less than 100 μm, W)Mn＞99.9％)；
Cr powder (grain size less than 100 μm, W)Cr＞99.9％)；
WC powder (grain size less than 50 μm, W)WC＞99.9％)；
Copper-coated graphite powder (flake graphite) (particle size < 75 μm, W)Cu＝50％)；
And step two, designing the mass ratio of WC (wolfram carbide) 3wt%, Ni: 3 wt%; mn powder and Cr powder (the mass ratio of the Mn powder to the Cr powder is 1: 1): 0.75 wt%; copper-coated graphite: 8 wt%, Fe-25 Cu: 85.25 wt%.
Weighing the raw materials according to the mixture ratio, firstly putting the copper-coated iron powder, the Ni powder, the WC powder, the Mn powder and the Cr powder into a planetary high-energy ball mill for mixing for 5-8 hours, and then putting the copper-coated graphite powder into the planetary high-energy ball mill for mixing for 5 hours;
fourthly, cold-pressing the powder into a cylindrical green compact with the diameter of 20mm and the thickness of 2mm under the pressure of 800MPa-1000 MPa;
fifthly, putting the cold blank into a hot vacuum hot pressing sintering furnace for sintering, wherein the pressure is 200 MPa; the heating speed is 50 ℃/min-100 ℃/min, and when the temperature reaches 1100 ℃, the heating is stopped after the heating and heat preservation is carried out for 2 h; cooling to room temperature along with the furnace;
sixthly, taking out the sample, ultrasonically cleaning and then air-drying;
the detection result is as follows: hardness HRC60, friction coefficient 0.65, wear rate 6.0X 10-10g/N.m。
The above description is only for the purpose of creating a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can substitute or change the technical solution and the inventive concept of the present invention within the technical scope of the present invention.
Claims (3)
1. A preparation method of a copper-iron based friction material is characterized by comprising the following steps:
firstly, selecting original and auxiliary powder materials;
copper-clad iron powder with grain size less than 75 μm and WCu=25%；
Ni powder with grain size less than 75 μm, WNi＞99.9%；
Manganese powder with grain size less than 100 mu m, WMn＞99.9%；
Chromium powder with grain size less than 100 μm, WCr＞99.9%；
WC powder with grain size less than 50 μm, WWC＞99.9%；
Copper-coated graphite powder with particle size less than 75 μm and WCu=50%；
Secondly, designing the mass ratio of 2-6 wt% of WC powder; ni powder: 1wt% -3 wt%; mn powder and Cr powder: 0.5wt% -1 wt%; copper-coated graphite powder: 4-10 wt% of copper-clad iron powder, and the balance of copper-clad iron powder;
weighing the raw materials according to the mixture ratio, firstly putting the copper-coated iron powder, the Ni powder, the WC powder, the Mn powder and the Cr powder into a planetary high-energy ball mill for mixing for 5-8 hours, and then putting the copper-coated graphite powder into the planetary high-energy ball mill for mixing for 5 hours;
fourthly, cold-pressing the powder into a cylindrical green compact with the diameter of 20mm and the thickness of 2mm under the pressure of 800MPa-1000 MPa;
fifthly, putting the cold blank into a hot vacuum hot pressing sintering furnace for sintering, wherein the pressure is 200 MPa; the heating speed is 50 ℃/min-100 ℃/min, and when the temperature reaches 1100 ℃, the heating is stopped after the heating and heat preservation is carried out for 2 h; cooling to room temperature along with the furnace;
sixthly, taking out the sample, ultrasonically cleaning and then air-drying;
seventhly, detecting the performance of the sample;
the copper-clad iron powder and the copper-clad graphite powder are both prepared by adopting an electroplating mode.
2. The method of manufacturing a copper-iron based friction material according to claim 1, characterized in that: in the copper-coated graphite powder, graphite is flaky.
3. The method of manufacturing a copper-iron based friction material according to claim 1, characterized in that: in the second step, the mass ratio of the manganese powder to the chromium powder is 1: 1.
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| CN111705231A (en) * | 2020-07-03 | 2020-09-25 | 毛金昌 | Nickel-based copper-clad graphite self-lubricating composite material and sintering method thereof |
| CN113481405B (en) * | 2021-06-29 | 2022-05-20 | 宁波金田铜业(集团)股份有限公司 | Preparation method of copper-iron alloy |
| CN113565907B (en) * | 2021-07-23 | 2022-12-09 | 北京浦然轨道交通科技股份有限公司 | Brake pad for motor car, friction material for brake pad and preparation method of friction material |
| CN114540697B (en) * | 2022-02-25 | 2023-02-24 | 惠州市新宏泰科技有限公司 | Superfine Fe-Cu-SiC-C-Al 2 O 3 Composite material and preparation method thereof |
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| CN115301941A (en) * | 2022-08-12 | 2022-11-08 | 大连大学 | Brake copper-iron-based composite friction material and preparation method thereof |
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| JP6032389B1 (en) * | 2015-04-02 | 2016-11-30 | 株式会社タンガロイ | Friction material |
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| CN102002622A (en) * | 2010-12-11 | 2011-04-06 | 大连大学 | Method for preparing brake Fe-Cu-Al-SiC composite friction material |
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