CN109468493B - Preparation process of powder metallurgy Ni-Al based high-temperature friction material - Google Patents
Preparation process of powder metallurgy Ni-Al based high-temperature friction material Download PDFInfo
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- 239000002783 friction material Substances 0.000 title claims abstract description 46
- 229910003310 Ni-Al Inorganic materials 0.000 title claims abstract description 17
- 238000004663 powder metallurgy Methods 0.000 title claims abstract description 16
- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- 239000000843 powder Substances 0.000 claims abstract description 66
- 229910000422 cerium(IV) oxide Inorganic materials 0.000 claims abstract description 22
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 18
- 229910052982 molybdenum disulfide Inorganic materials 0.000 claims abstract description 17
- 238000000034 method Methods 0.000 claims abstract description 13
- 238000002156 mixing Methods 0.000 claims abstract description 9
- 229910052961 molybdenite Inorganic materials 0.000 claims abstract description 9
- 238000003825 pressing Methods 0.000 claims description 17
- 239000002245 particle Substances 0.000 claims description 14
- 238000010438 heat treatment Methods 0.000 claims description 12
- 229910052782 aluminium Inorganic materials 0.000 claims description 9
- CETPSERCERDGAM-UHFFFAOYSA-N ceric oxide Chemical compound O=[Ce]=O CETPSERCERDGAM-UHFFFAOYSA-N 0.000 claims description 9
- 229910052804 chromium Inorganic materials 0.000 claims description 7
- 229910052759 nickel Inorganic materials 0.000 claims description 7
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 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
- 238000013461 design Methods 0.000 claims description 6
- 239000011812 mixed powder Substances 0.000 claims description 6
- 239000002994 raw material Substances 0.000 claims description 6
- 239000010935 stainless steel Substances 0.000 claims description 6
- 229910001220 stainless steel Inorganic materials 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 241000357293 Leptobrama muelleri Species 0.000 claims description 4
- 229910052748 manganese Inorganic materials 0.000 claims description 4
- 230000000754 repressing effect Effects 0.000 claims 1
- 230000001050 lubricating effect Effects 0.000 abstract description 7
- 238000005728 strengthening Methods 0.000 abstract description 5
- 229910045601 alloy Inorganic materials 0.000 abstract description 4
- 239000000956 alloy Substances 0.000 abstract description 4
- 238000005245 sintering Methods 0.000 abstract description 3
- 238000007731 hot pressing Methods 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 25
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 17
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 12
- 239000000463 material Substances 0.000 description 11
- 239000011651 chromium Substances 0.000 description 10
- 239000011572 manganese Substances 0.000 description 10
- 229910052751 metal Inorganic materials 0.000 description 10
- 239000002184 metal Substances 0.000 description 10
- 229910010271 silicon carbide Inorganic materials 0.000 description 10
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 8
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 8
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 description 8
- 229910003465 moissanite Inorganic materials 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 229910015800 MoS Inorganic materials 0.000 description 4
- 239000004411 aluminium Substances 0.000 description 4
- 238000011160 research Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 238000001308 synthesis method Methods 0.000 description 1
- 238000012360 testing method Methods 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
- C22C19/00—Alloys based on nickel or cobalt
- C22C19/03—Alloys based on nickel or cobalt based on nickel
- C22C19/05—Alloys based on nickel or cobalt based on nickel with chromium
- C22C19/058—Alloys based on nickel or cobalt based on nickel with chromium without Mo and W
-
- 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
- C22C1/0433—Nickel- or cobalt-based alloys
-
- 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
- C22C19/00—Alloys based on nickel or cobalt
- C22C19/007—Alloys based on nickel or cobalt with a light metal (alkali metal Li, Na, K, Rb, Cs; earth alkali metal Be, Mg, Ca, Sr, Ba, Al Ga, Ge, Ti) or B, Si, Zr, Hf, Sc, Y, lanthanides, actinides, as the next major constituent
-
- 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
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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)
Abstract
The invention provides a preparation process of a powder metallurgy Ni-Al based high-temperature friction material. Mixing Ni powder and Al powder in certain proportion, and adding small amount of lubricating component MoS2Powder and graphite powder, strengthening component Cr powder and Mn powder, friction component SiC and CeO2And preparing the Ni-Al based friction material by a hot-pressing sintering method of powder metallurgy. The friction material with good comprehensive performance and relatively low price is obtained, so that the friction material has stable friction coefficient and lower wear rate in the range of room temperature to 1000 ℃, and when the friction material is used in the field of high-temperature friction materials, the requirements of domestic markets can be met, the production cost is reduced, the application range of the Ni-Al high-temperature alloy is further widened, and the Ni-Al high-temperature alloy has very good social value and economic value. The preparation method is simple, low in cost and strong in controllability.
Description
Technical Field
The invention belongs to the field of friction materials, and particularly relates to a preparation process of a powder metallurgy Ni-Al based high-temperature friction material.
Background
In modern society, the deceleration and stopping of many power equipment and vehicles need to be realized by braking, such as the deceleration and stopping of trains, automobiles, electric vehicles and the like, the landing of airplanes and the like. The braking of power equipment and vehicles mainly comprises two modes of power braking and friction braking, and most mechanical equipment adopts the mode of friction braking. Therefore, friction materials are important components in brakes, clutches, and friction drives of various vehicles and power machines, and play a key role in deceleration, braking, stopping, transmission, steering, and the like. The friction material has the main function of transmitting power through friction, and converts the power into heat energy and other forms of energy by utilizing the friction performance of the friction material, so that the power device achieves the purposes of braking, decelerating or stopping, and ensures safe parking, such as a brake pad, and therefore, the friction material is also called as a braking material or a brake material.
The powder metallurgy friction material is developed along with the powder metallurgy technology, and has been developed for more than 80 years. In the 18-19 th century, the powder metallurgy technology is adopted to prepare platinum in Europe, which is the beginning of the revival and development of the modern powder metallurgy technology. With the innovation of powder metallurgy technology, the sintered metal friction material has rapidly developed after the twentieth century, and various new materials have emerged. In 1929, american p.schwarzkopf first proposed the preparation of friction materials by powder metallurgy and started research work for the preparation of sintered metal friction materials, and in 1932, the copper-based sintered metal friction materials prepared by the american general company were used in the aerospace industry, which was the first user of sintered metal friction materials. At the end of the last 30 s, sintered metal friction materials were used on clutches in D-7, D-8 scrapers. In 1938, sintered metal friction materials began to find application in brake applications and automotive transmissions. Between 1937 and 1941, Wilman and colleagues in the United states patented a sintering process for sintered metal friction materials. In the 40 s, sintered metal friction materials were gradually applied to machines such as heavy trucks, passenger cars, tractors, tanks, and the like. Sintered metal friction materials were used mainly in dry friction conditions before the 50 s.
With the further development of aviation, aerospace and military industries in recent years, the problems of friction, abrasion and lubrication of materials under high temperature conditions are increasingly emphasized, a new generation of high temperature resistant lubricating and wear resistant materials are urgently needed to be developed by applying a high temperature lubricating technology, and the research on solid lubricating materials with good tribological properties from room temperature to high temperature is an important research direction in the field of high temperature tribological materials. The nickel-based high-temperature alloy has the advantages of high working temperature, stable structure, less harmful phases, strong oxidation resistance, strong hot corrosion resistance and the like, so the nickel-based high-temperature alloy is widely applied to preparing metal-based high-temperature self-lubricating composite materials as a base material.
Disclosure of Invention
Based on the current situation, the Ni-Al-based high-performance friction material is prepared by adopting a powder metallurgy preparation process and utilizing a solid-solid reaction and solid-liquid reaction synthesis method, and finally the high-performance friction material with high temperature resistance and self lubrication needs to be designed. Mixing Ni powder and Al powder in a certain proportionAdding lubricating component MoS2Powder and graphite powder, strengthening component Cr powder and Mn powder, friction component SiC and CeO2The Ni-Al-based friction material is prepared by hot-pressing and sintering after uniform mixing, the friction material with good comprehensive performance and relatively low price is expected to be obtained, so that the friction material has continuous, stable and low friction coefficient and wear rate at room temperature to 1000 ℃, and the Ni-Al-based friction material can meet the requirements of domestic markets, reduce the production cost, further widen the application range of the Ni-Al-based material and have very good social value and economic value when applied to high-temperature friction materials.
The preparation method of the powder metallurgy Ni-Al based friction material comprises the following steps:
(1) selecting raw material powder;
(2) preparing friction material sample powder according to the mass ratio of the formula design;
(3) mixing a sample by a JF801S model mixer;
(4) pressing the uniformly mixed powder into a cylindrical pressed blank, and re-pressing once, wherein the pressing time is 5 minutes each time;
(5) putting the pressed blank into a vacuum resistance furnace device, heating and preserving heat for 120min when the temperature reaches 1000 ℃, and then stopping heating; cooling to room temperature along with the furnace;
(6) taking out the sample, ultrasonically cleaning and then air-drying;
(7) and detecting the friction performance of the sample.
Another purpose of the invention is to protect the application of the Ni-Al based high-performance friction material prepared by the method in the field of friction materials.
The Ni-Al-based high-performance friction material is prepared by a powder metallurgy method, and has the following advantages:
(1) the friction material with good uniformity, high purity, strong bonding force, high hardness, high temperature resistance, wear resistance and corrosion resistance is prepared by adopting the traditional powder metallurgy process and considering the influence of multiple aspects.
(2) The experiment is doped with matrix strengthening elements Cr and Mn, has the functions of fine grain strengthening and solid solution strengthening, improves the porosity, strength and hardness of the matrix, and improves the wear resistance.
(3) Doped graphite and MoS2The lubricating agent is a lubricating component, and can improve the self-lubricating property of the base body, thereby reducing the friction coefficient and reducing the wear rate.
(4) Doping of SiC and CeO2The wear-resistant component can be matched with the lubricating component to adjust the friction coefficient, so that the wear resistance of the material can be improved, and the braking stability of the material can be improved.
Drawings
FIG. 1 shows a Ni-Al based friction material of the present invention, in which steel backing No. 1-45 steel, 2-Ni-Al based friction material.
Detailed Description
The invention is described in more detail below with reference to specific examples, without limiting the scope of the invention. The experimental instruments involved in this experiment were as follows: an electronic balance scale, a YLJ-303 micro press machine, a vacuum resistance furnace and a friction wear testing machine. The methods referred to in the examples are, unless otherwise specified, well known to those of ordinary skill in the art.
The specific experimental steps are as follows:
(1) selecting raw material powder (Ni, Al, MoS)2SiC, graphite powder, Cr, Mn and CeO2)
Aluminium powder (grain size less than 100 μm, W)Al＞99.9％)；
Nickel powder (particle size < 100 μm, W)Ni＞99.9％)；
Molybdenum disulfide powder (MoS)2) Particle size of less than 100 μm, WMoS2＞99.9％)；
Silicon carbide powder (grain size less than 75 μm, W)SiC＞99.9％)；
Graphite powder (grain size less than 100 μm, W)C＞99.9％)；
Manganese powder (grain size less than 100 μm, W)Mn＞99.9％)；
Chromium powder (grain size less than 100 μm, W)Cr＞99.9％)；
Cerium dioxide powder (CeO)2Powder) (particle size < 100 μm, WCeO2＞99.9％)
(2) Preparing friction material sample powder according to mass ratio of formula design and processThe parameters (wt%): 1-3% of silicon carbide powder and molybdenum disulfide powder (MoS)2)0.5-1.5 percent of graphite powder, 1-5 percent of manganese powder, 0.5-1.5 percent of chromium powder, 0.1-0.5 percent of CeO20.1 to 0.5 percent of powder, and the balance of nickel powder and aluminum powder (wherein the mass ratio of the nickel powder to the aluminum powder is (2.7 to 6.5): 1);
(3) mixing powder in a mixer for 5-6 h;
(4) pressing the uniformly mixed powder into a cylindrical blank with the diameter of 30mm and the thickness of 1mm under the pressure of 1500-2000MPa, and re-pressing once under the pressure of 1500MPa, wherein the pressing time is 5 minutes each time;
(5) placing the blank on a No. 45 steel back with the thickness of 35 multiplied by 2mm, placing the blank in a stainless steel clamp, applying a clamping force of 10MPa, then placing the blank in a vacuum resistance furnace for heating, keeping the temperature for 1 to 2 hours after the temperature reaches 1000 ℃, and then stopping heating; cooling to room temperature along with the furnace;
(6) taking out the sample, ultrasonically cleaning and then air-drying;
(7) detecting the hardness and the tribological performance of the sample;
(8) and (3) determining the hardness, the friction coefficient and the wear rate by using a Rockwell hardness tester, a friction and wear tester and an electronic balance: hardness (HRC)50-80, friction coefficient 0.40-0.65, wear rate (x 10)-10kg/N.m)4.0-6.0；
Example 1:
the specific experimental steps are as follows:
(2) selecting raw material powder (Ni, Al, MoS)2Cr, Mn, SiC, graphite powder, CeO2)
Aluminium powder (grain size less than 100 μm, W)Al＞99.9％)；
Nickel powder (particle size < 100 μm, W)Ni＞99.9％)；
Molybdenum disulfide powder (MoS)2) Particle size < 100 μm, WMoS2＞99.9％)；
Silicon carbide powder (grain size less than 75 μm, W)SiC＞99.9％)；
Graphite powder (grain size less than 100 μm, W)C＞99.9％)；
Manganese powder (grain size less than 100 μm, W)Mn＞99.9％)；
Chromium powder (grain size less than 100 μm, W)Cr＞99.9％)；
Cerium dioxide powder (CeO)2Powder) (particle size < 100 μm, WCeO2＞99.9％)
(2) Preparing friction material sample powder according to the mass ratio of the formula design, wherein the process parameters (wt%): 1% of silicon carbide powder and molybdenum disulfide powder (MoS)2)0.5 percent of graphite powder, 1 percent of manganese powder, 0.1 percent of chromium powder, CeO20.1 percent of powder, and the balance of nickel powder and aluminum powder (wherein the mass ratio of the nickel powder to the aluminum powder is 2.7: 1);
(3) mixing powder for 5 hours by a mixer;
(4) pressing the uniformly mixed powder into a cylindrical blank with the diameter of 30mm and the thickness of 1mm under the pressure of 1500MPa, and re-pressing once under the pressure of 1500MPa, wherein the pressing time is 5 minutes each time;
(5) putting the blank on the back of No. 45 steel sheet steel with the thickness of 35 multiplied by 2mm, putting the blank together in a stainless steel clamp, applying the clamping force of 10MPa, then putting the blank into a vacuum resistance furnace for heating, keeping the temperature for 1h after the temperature reaches 1000 ℃, and then stopping heating; cooling to room temperature along with the furnace;
(6) taking out the sample, ultrasonically cleaning and then air-drying;
(7) detecting the hardness and the tribological performance of the sample;
(8) and (3) determining the hardness, the friction coefficient and the wear rate by using a Rockwell hardness tester, a friction and wear tester and an electronic balance: hardness (HRC)50, coefficient of friction 0.40, wear rate (. times.10)-10kg/N.m)6.0。
Example 2:
the specific experimental steps are as follows:
(3) selecting raw material powder (Ni, Al, MoS)2Cr, Mn, SiC, graphite powder, CeO2)
Aluminium powder (grain size less than 100 μm, W)Al＞99.9％)；
Nickel powder (particle size < 100 μm, W)Ni＞99.9％)；
Molybdenum disulfide powder (MoS)2) Particle size < 100 μm, WMoS2＞99.9％)；
Silicon carbide powder (grain size less than 75 μm, W)SiC＞99.9％)；
Graphite powder (grain size less than 100 μm, W)C＞99.9％)；
Manganese powder (grain size less than 100 μm, W)Mn＞99.9％)；
Chromium powder (grain size less than 100 μm, W)Cr＞99.9％)；
Cerium dioxide powder (CeO)2Powder) (particle size < 100 μm, WCeO2＞99.9％)
(2) Preparing friction material sample powder according to the mass ratio of the formula design, wherein the process parameters (wt%): 3% of silicon carbide powder and molybdenum disulfide powder (MoS)2)1 percent of graphite powder, 5 percent of manganese powder, 1.5 percent of chromium powder, and CeO20.5 percent of powder, and the balance of nickel powder and aluminum powder (wherein the mass ratio of the nickel powder to the aluminum powder is 6.5: 1);
(3) mixing powder for 6 hours by using a mixer;
(4) pressing the uniformly mixed powder into a cylindrical blank with the diameter of 30mm and the thickness of 1mm under the pressure of 2000MPa, and re-pressing once under the pressure of 1500MPa, wherein the pressing time is 5 minutes each time;
(5) putting the blank on a No. 45 steel back with the thickness of 35 multiplied by 2mm, putting the blank together in a stainless steel clamp, applying a clamping force of 10MPa, then putting the blank into a vacuum resistance furnace for heating, keeping the temperature for 2 hours after the temperature reaches 1000 ℃, and then stopping heating; cooling to room temperature along with the furnace;
(6) taking out the sample, ultrasonically cleaning and then air-drying;
(7) detecting the hardness and the tribological performance of the sample;
(8) and (3) determining the hardness, the friction coefficient and the wear rate by using a Rockwell hardness tester, a friction and wear tester and an electronic balance: hardness (HRC)80, coefficient of friction 0.5, wear rate (. times.10)-10kg/N.m)4.0。
Example 3:
(4) selecting raw material powder (Ni, Al, MoS)2Cr, Mn, SiC, graphite powder, CeO2)
Aluminium powder (grain size less than 100 μm, W)Al＞99.9％)；
Nickel powder (particle size < 100 μm, W)Ni＞99.9％)；
Molybdenum disulfide powder (MoS)2) Particle size < 100 μm, WMoS2＞99.9％)；
Silicon carbide powder (grain size less than 75 μm, W)SiC＞99.9％)；
Graphite powder (grain size less than 100 μm, W)C＞99.9％)；
Manganese powder (grain size less than 100 μm, W)Mn＞99.9％)；
Chromium powder (grain size less than 100 μm, W)Cr＞99.9％)；
Cerium dioxide powder (CeO)2Powder) (particle size < 100 μm, WCeO2＞99.9％)
(2) Preparing friction material sample powder according to the mass ratio of the formula design, wherein the process parameters (wt%): 2% of silicon carbide powder and molybdenum disulfide powder (MoS)2)1.5 percent of graphite powder, 3 percent of manganese powder, 0.3 percent of chromium powder and CeO20.3 percent of powder, and the balance of nickel powder and aluminum powder (wherein the mass ratio of the nickel powder to the aluminum powder is 4: 1);
(3) mixing powder for 6 hours by using a mixer;
(4) pressing the uniformly mixed powder into a cylindrical blank with the diameter of 30mm and the thickness of 1mm under the pressure of 1800MPa, and re-pressing once under the pressure of 1500MPa, wherein the pressing time is 5 minutes each time;
(5) putting the blank on a No. 45 steel back with the thickness of 35 multiplied by 2mm, putting the blank together in a stainless steel clamp, applying a clamping force of 10MPa, then putting the blank into a vacuum resistance furnace for heating, keeping the temperature for 1.5h after the temperature reaches 1000 ℃, and then stopping heating; cooling to room temperature along with the furnace;
(6) taking out the sample, ultrasonically cleaning and then air-drying;
(7) detecting the hardness and the tribological performance of the sample;
(8) and (3) determining the hardness, the friction coefficient and the wear rate by using a Rockwell hardness tester, a friction and wear tester and an electronic balance: hardness (HRC)70, coefficient of friction 0.55, wear rate (. times.10)-10kg/N.m)5.0。
Claims (5)
1. A preparation process of a powder metallurgy Ni-Al based high-temperature friction material is characterized by comprising the following steps:
(1) selecting raw material powders of Ni, Al and MoS2SiC, graphite powder, Cr, Mn and CeO2；
(2) Preparing friction material sample powder according to the mass ratio of the formula design: 1-3 wt% of SiC powder, MoS20.5-1.5 wt%, graphite powder 1-5 wt%, Mn powder 0.5-1.5 wt%, Cr powder 0.1-0.5 wt%, CeO20.1-0.5 wt% of powder, and the balance of Ni powder and Al powder, wherein the mass ratio of the Ni powder to the Al powder is (2.7-6.5): 1;
(3) mixing powder in a mixer for 5-6 h;
(4) pressing the uniformly mixed powder into a cylindrical blank under the pressure of 1500-2000MPa, and repressing once, wherein the pressing time is 5 minutes each time;
(5) putting the blank on a No. 45 steel back, clamping the blank in a stainless steel clamp, putting the blank into a vacuum resistance furnace, heating and preserving heat for 1-2 hours when the temperature reaches 1000 ℃, and then stopping heating; cooling to room temperature along with the furnace;
(6) and taking out the sample, ultrasonically cleaning and then air-drying.
2. The method of claim 1, further comprising the step of:
(7) detecting the hardness and the tribological performance of the sample;
(8) and (3) measuring the hardness, the friction coefficient and the wear rate by using a Rockwell hardness tester, a friction and wear tester and an electronic balance.
3. The method of claim 1,
al powder (grain size is less than 100 mu m, WAl is more than 99.9%);
ni powder (the grain diameter is less than 100 mu m, WNi is more than 99.9%);
MoS2powder (particle size < 100 μm, WMoS)2＞99.9％)；
SiC powder (the grain diameter is less than 75 mu m, WSiC is more than 99.9%);
graphite powder (grain size less than 100 μm, WC more than 99.9%);
mn powder (the grain diameter is less than 100 mu m, WMn is more than 99.9%);
cr powder (the grain diameter is less than 100 mu m, and WCr is more than 99.9%);
CeO2powder (particle size < 100 μm, WCeO)2＞99.9％)。
4. The method of claim 1, wherein step (4) is recompressed at a pressure of 1500 MPa.
5. The method according to claim 1, wherein the step (5) comprises placing the blank on a 35mm x 2mm steel backing of steel No. 45 in a stainless steel jig with a clamping force of 10MPa, and then placing the blank in a vacuum resistance furnace.
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Application publication date: 20190315 Assignee: DALIAN WEIERBO ALLOY TECHNOLOGY CO.,LTD. Assignor: DALIAN University Contract record no.: X2023980049256 Denomination of invention: Preparation process of a powder metallurgy Ni Al based high-temperature friction material Granted publication date: 20200407 License type: Common License Record date: 20231130 Application publication date: 20190315 Assignee: Dalian wina fluid equipment Co.,Ltd. Assignor: DALIAN University Contract record no.: X2023980049065 Denomination of invention: Preparation process of a powder metallurgy Ni Al based high-temperature friction material Granted publication date: 20200407 License type: Common License Record date: 20231130 |