CN104525949A - High abrasion-resisting copper-based friction composite material and preparing method thereof - Google Patents
High abrasion-resisting copper-based friction composite material and preparing method thereof Download PDFInfo
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- 239000002131 composite material Substances 0.000 title claims abstract description 70
- 239000010949 copper Substances 0.000 title claims abstract description 68
- 229910052802 copper Inorganic materials 0.000 title claims abstract description 42
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title claims abstract description 36
- 238000000034 method Methods 0.000 title claims abstract description 11
- 239000000919 ceramic Substances 0.000 claims abstract description 36
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 32
- 239000000203 mixture Substances 0.000 claims abstract description 15
- 239000002994 raw material Substances 0.000 claims abstract description 14
- 238000004663 powder metallurgy Methods 0.000 claims abstract description 9
- 239000000463 material Substances 0.000 claims abstract description 6
- 239000000843 powder Substances 0.000 claims description 125
- 238000005245 sintering Methods 0.000 claims description 32
- 238000002156 mixing Methods 0.000 claims description 11
- 239000002245 particle Substances 0.000 claims description 9
- 241000357293 Leptobrama muelleri Species 0.000 claims description 8
- 238000005303 weighing Methods 0.000 claims description 8
- 238000003825 pressing Methods 0.000 claims description 3
- 229910052961 molybdenite Inorganic materials 0.000 claims description 2
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 claims description 2
- 229910052982 molybdenum disulfide Inorganic materials 0.000 claims description 2
- 238000002360 preparation method Methods 0.000 abstract description 11
- 239000002783 friction material Substances 0.000 abstract description 9
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 229910002804 graphite Inorganic materials 0.000 abstract 1
- 239000010439 graphite Substances 0.000 abstract 1
- 229910010293 ceramic material Inorganic materials 0.000 description 6
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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Abstract
本发明涉及一种适用于制造铁路车辆制动闸片的高耐磨铜基摩擦复合材料及其制备方法，属于摩擦材料技术领域。其原料包括Cu、Fe、Cr、ZTA复合陶瓷、MoS2及石墨粉末，其重量百分比构成如下：Cu：45～60%、Fe：15～25%、Cr：5～10%、ZTA复合陶瓷：2～10%、MoS2：0.5～2%、石墨：10～20%。本发明采用粉末冶金方法高真空烧结成形高耐磨铜基摩擦复合材料，该材料具有强度高、硬度大，在高速、高温条件下，具有摩擦系数高、抗磨损能力强、稳定性好、导热性高、寿命长等优点，适合于制造高速列车制动闸片。The invention relates to a high wear-resistant copper-based friction composite material suitable for manufacturing railway vehicle brake pads and a preparation method thereof, belonging to the technical field of friction materials. Its raw materials include Cu, Fe, Cr, ZTA composite ceramics, MoS 2 and graphite powder, and its weight percentage composition is as follows: Cu: 45-60%, Fe: 15-25%, Cr: 5-10%, ZTA composite ceramics: 2 to 10%, MoS 2 : 0.5 to 2%, graphite: 10 to 20%. The invention adopts the powder metallurgy method to sinter and form the high-wear-resistant copper-based friction composite material. The material has high strength and high hardness. Under high-speed and high-temperature conditions, it has high friction coefficient, strong wear resistance, good stability and heat conduction. High performance, long life and other advantages, suitable for manufacturing high-speed train brake pads.
Description
技术领域 technical field
本发明属于摩擦材料技术领域，具体是涉及一种适用于制造铁路车辆制动闸片的高耐磨铜基摩擦复合材料及其制备方法。 The invention belongs to the technical field of friction materials, and in particular relates to a high wear-resistant copper-based friction composite material suitable for manufacturing railway vehicle brake pads and a preparation method thereof.
背景技术 Background technique
铜基摩擦复合材料具有较高强度、耐磨性好、导热性高等优点，是制造制动装置的重要材料，在高速列车、飞机、汽车等交通运输工具中获得广泛应用。随着电气化铁路的快速发展，对列车制动性能提出了更高的要求，特别是对摩擦材料的性能要求越来越高，不仅要求具有高强度、高导热性，同时要求有足够高的摩擦系数、高温稳定性、优良的耐磨性等特点。 Copper-based friction composite materials have the advantages of high strength, good wear resistance, and high thermal conductivity. They are important materials for manufacturing brake devices and are widely used in high-speed trains, airplanes, automobiles and other transportation tools. With the rapid development of electrified railways, higher requirements are put forward for the braking performance of trains, especially for friction materials, which not only require high strength and high thermal conductivity, but also require high enough friction Coefficient, high temperature stability, excellent wear resistance and other characteristics.
现有技术中为提高列车用铜基摩擦复合材料的抗磨损能力，通常加入碳化硅、氧化锆、氧化铝等单相陶瓷材料，由于这几种单相陶瓷材料具有高的熔点、硬度和化学稳定性等特性，在摩擦材料中得到较广泛应用。但是单相陶瓷材料的高硬度等性能不能保证材料具有良好的耐磨性。在许多实际摩擦环境中为保证低磨损率,还要求陶瓷材料具有较高的断裂韧性。单相陶瓷材料由于脆性大，断裂韧性低, 陶瓷颗粒容易发生折断而剥落，增大了磨损量，降低了刹车片的制动效果，不能很好地满足实际要求，特别是高速列车制动情况下的使用要求。因此，单相陶瓷材料对提高铜基摩擦复合材料的耐磨性能仍然有限或不稳定，还需要进一步改善和提高。以上问题极大地限制了铜基摩擦复合材料的进一步快速发展和推广应用。 In the prior art, in order to improve the wear resistance of copper-based friction composite materials for trains, single-phase ceramic materials such as silicon carbide, zirconia, and alumina are usually added, because these single-phase ceramic materials have high melting points, hardness and chemical properties. Stability and other characteristics are widely used in friction materials. However, the high hardness and other properties of single-phase ceramic materials cannot guarantee that the material has good wear resistance. In order to ensure low wear rate in many practical friction environments, ceramic materials are also required to have high fracture toughness. Due to the high brittleness and low fracture toughness of single-phase ceramic materials, the ceramic particles are easy to break and peel off, which increases the amount of wear and reduces the braking effect of the brake pads, and cannot well meet the actual requirements, especially in the case of high-speed train braking. use requirements below. Therefore, single-phase ceramic materials are still limited or unstable in improving the wear resistance of copper-based friction composites, and further improvement and improvement are needed. The above problems greatly limit the further rapid development and popularization and application of copper-based friction composite materials.
发明内容 Contents of the invention
本发明的目的在于针对上述存在问题和不足，提供一种含有氧化锆增韧氧化铝复合陶瓷的耐磨性能优越、稳定性好、导热性好、使用寿命长的高耐磨铜基摩擦复合材料及其制备方法。 The purpose of the present invention is to address the above existing problems and deficiencies, to provide a high wear-resistant copper-based friction composite material containing zirconia toughened alumina composite ceramics with excellent wear resistance, good stability, good thermal conductivity and long service life and its preparation method.
本发明的技术方案是这样实现的： Technical scheme of the present invention is realized like this:
本发明所述的高耐磨铜基摩擦复合材料，其特点是由如下重量百分比的成分混合制成：Cu粉：45～60%、Fe粉：15～25%、Cr粉：5～10%、ZTA复合陶瓷粉：2～10%、MoS2粉：0.5～2%、石墨粉：10～20%，其中Cu粉、Fe粉、Cr粉的纯度大于99.0%，粒度小于75μm；ZTA复合陶瓷粉的纯度大于99.0%，粒度为75～150μm；MoS2粉和石墨粉的纯度大于99.5%，粒度小于75μm。 The high wear-resistant copper-based friction composite material of the present invention is characterized by mixing the following components by weight percentage: Cu powder: 45-60%, Fe powder: 15-25%, Cr powder: 5-10% , ZTA composite ceramic powder: 2-10%, MoS 2 powder: 0.5-2%, graphite powder: 10-20%, among which the purity of Cu powder, Fe powder and Cr powder is greater than 99.0%, and the particle size is less than 75μm; ZTA composite ceramic The purity of the powder is greater than 99.0%, and the particle size is 75-150 μm; the purity of MoS 2 powder and graphite powder is greater than 99.5%, and the particle size is less than 75 μm.
进一步地，上述各组成成分的更好重量百分比为：Cu粉：48～53%、Fe粉：18～22%、Cr粉：6～8%、ZTA复合陶瓷粉：4～8%、MoS2粉：0.8～1.8%、石墨粉：12～18%。 Further, the better weight percentages of the above components are: Cu powder: 48-53%, Fe powder: 18-22%, Cr powder: 6-8%, ZTA composite ceramic powder: 4-8%, MoS 2 Powder: 0.8～1.8%, graphite powder: 12～18%.
更进一步地，上述各组成成分的最佳重量百分比为：Cu粉：50%、Fe粉：20%、Cr粉：7%、ZTA复合陶瓷粉：7%、MoS2粉：1%、石墨粉：15%。 Furthermore, the optimal weight percentages of the above components are: Cu powder: 50%, Fe powder: 20%, Cr powder: 7%, ZTA composite ceramic powder: 7%, MoS 2 powder: 1%, graphite powder : 15%.
本发明所述的高耐磨铜基摩擦复合材料的制备方法是采用粉末冶金的方式制备所述的高耐磨铜基摩擦复合材料，其特点是包括以下步骤： The preparation method of the high wear-resistant copper-based friction composite material of the present invention is to prepare the high-wear-resistant copper-based friction composite material by powder metallurgy, which is characterized in that it includes the following steps:
1）称料：按重量百分比配比称量Cu粉、Fe粉、Cr粉、ZTA复合陶瓷粉、MoS2粉和石墨粉； 1) Weighing: Weigh Cu powder, Fe powder, Cr powder, ZTA composite ceramic powder, MoS 2 powder and graphite powder according to weight percentage;
2）混料：将配好的料经高速搅拌机混合至均匀； 2) Mixing: Mix the prepared materials with a high-speed mixer until uniform;
3）压制：将混合均匀的原料放入模具中进行压制成压坯，压力为650～850MPa； 3) Pressing: Put the uniformly mixed raw materials into the mold and press them into compacts, the pressure is 650-850MPa;
4）真空加压烧结：将压坯固定在支撑钢背上，放入真空烧结炉中进行烧结，真空度为0.1～10Pa，烧结温度为750～900℃，施加压力为1～3MPa，保温时间2～4小时，得到高耐磨铜基摩擦复合材料。 4) Vacuum pressure sintering: fix the compact on the supporting steel back, put it into a vacuum sintering furnace for sintering, the vacuum degree is 0.1-10Pa, the sintering temperature is 750-900℃, the applied pressure is 1-3MPa, the holding time After 2 to 4 hours, a high wear-resistant copper-based friction composite material is obtained.
本发明与现有技术相比，具有以下优点： Compared with the prior art, the present invention has the following advantages:
1、与传统在铜基摩擦复合材料中加入单相陶瓷相比，本发明在铜基摩擦复合材料中加入了韧性更好、断裂韧性更高的ZTA复合陶瓷，有利于进一步提高耐磨性能，从而提高刹车效率； 1. Compared with the traditional addition of single-phase ceramics to copper-based friction composite materials, the present invention adds ZTA composite ceramics with better toughness and higher fracture toughness to copper-based friction composite materials, which is conducive to further improving wear resistance. Thereby improving the braking efficiency;
2、本发明制备工艺简单、操作较简便，有利于推广应用； 2. The preparation process of the present invention is simple, and the operation is relatively simple, which is conducive to popularization and application;
3、采用本发明获得的铜基摩擦复合材料在高速下摩擦系数高、磨损小、稳定性高、导热性好、使用寿命长，适合用于制造铁路车辆制动闸片。 3. The copper-based friction composite material obtained by the present invention has high friction coefficient, low wear, high stability, good thermal conductivity and long service life at high speed, and is suitable for manufacturing railway vehicle brake pads.
具体实施方式 detailed description
本发明所述的高耐磨铜基摩擦复合材料，由如下重量百分比的成分混合制成：Cu粉：45～60%、Fe粉：15～25%、Cr粉：5～10%、ZTA复合陶瓷粉：2～10%、MoS2粉：0.5～2%、石墨粉：10～20%，其中Cu粉、Fe粉、Cr粉的纯度大于99.0%，粒度小于75μm；ZTA复合陶瓷粉的纯度大于99.0%，粒度为75～150μm；MoS2粉和石墨粉的纯度大于99.5%，粒度小于75μm。进一步地，所述各组成成分的更好重量百分比为：Cu粉：48～53%、Fe粉：18～22%、Cr粉：6～8%、ZTA复合陶瓷粉:4～8%、MoS2粉: 0.8～1.8%、石墨粉：12～18%。更进一步地，所述各组成成分的最佳重量百分比为：Cu粉：50%、Fe粉：20%、Cr粉：7%、ZTA复合陶瓷粉:7%、MoS2粉:1%、石墨粉：15%。 The high wear-resistant copper-based friction composite material of the present invention is made by mixing the following components by weight percentage: Cu powder: 45-60%, Fe powder: 15-25%, Cr powder: 5-10%, ZTA composite Ceramic powder: 2 to 10%, MoS 2 powder: 0.5 to 2%, graphite powder: 10 to 20%, among which the purity of Cu powder, Fe powder and Cr powder is greater than 99.0%, and the particle size is less than 75μm; the purity of ZTA composite ceramic powder The purity is greater than 99.0%, and the particle size is 75-150 μm; the purity of MoS 2 powder and graphite powder is greater than 99.5%, and the particle size is less than 75 μm. Further, the better weight percentages of the components are: Cu powder: 48-53%, Fe powder: 18-22%, Cr powder: 6-8%, ZTA composite ceramic powder: 4-8%, MoS 2 powder: 0.8~1.8%, graphite powder: 12~18%. Further, the optimal weight percent of each composition is: Cu powder: 50%, Fe powder: 20%, Cr powder: 7%, ZTA composite ceramic powder: 7%, MoS 2 powder: 1%, graphite Powder: 15%.
本发明所述的高耐磨铜基摩擦复合材料的制备方法，该方法采用粉末冶金的方式制备上述高耐磨铜基摩擦复合材料，其包括以下步骤： The preparation method of the high wear-resistant copper-based friction composite material according to the present invention, the method adopts powder metallurgy to prepare the above-mentioned high wear-resistant copper-based friction composite material, which includes the following steps:
1）称料：按重量百分比配比称量Cu粉、Fe粉、Cr粉、ZTA复合陶瓷粉、MoS2粉和石墨粉； 1) Weighing: Weigh Cu powder, Fe powder, Cr powder, ZTA composite ceramic powder, MoS 2 powder and graphite powder according to weight percentage;
2）混料：将配好的料经高速搅拌机混合至均匀； 2) Mixing: Mix the prepared materials with a high-speed mixer until uniform;
3）压制：将混合均匀的原料放入模具中进行压制成压坯，压力为650～850MPa； 3) Pressing: Put the uniformly mixed raw materials into the mold and press them into compacts, the pressure is 650-850MPa;
4）真空加压烧结：将压坯固定在支撑钢背上，放入真空烧结炉中进行烧结，真空度为0.1～10Pa，烧结温度为750～900℃，施加压力为1～3MPa，保温时间2～4小时，得到高耐磨铜基摩擦复合材料。 4) Vacuum pressure sintering: fix the compact on the supporting steel back, put it into a vacuum sintering furnace for sintering, the vacuum degree is 0.1-10Pa, the sintering temperature is 750-900℃, the applied pressure is 1-3MPa, the holding time After 2 to 4 hours, a high wear-resistant copper-based friction composite material is obtained.
实施例1： Example 1:
制备一种高耐磨铜基摩擦复合材料，其各组分重量百分比如下：Cu粉：45%、Fe粉：25%、Cr粉：5%、ZTA复合陶瓷粉：10%、MoS2粉：2%、石墨粉：13%。其制备步骤如下：1）称料：按重量百分比配比称量Cu粉：45%、Fe粉：25%、Cr粉：5%、ZTA复合陶瓷粉：10%、MoS2粉：2%、石墨粉：13%；2）混料：将配好的原料组分Cu、Fe、Cr、ZTA复合陶瓷、MoS2和石墨粉末经高速搅拌机混合均匀；3）压制：将混合均匀的原料在650MPa压力下压制得到压坯；4）加压烧结：将压坯固定在支撑钢背上，放入真空烧结炉中进行烧结，真空度为0.1Pa，烧结温度为900℃，施加压力为1MPa，保温时间2小时，得到粉末冶金摩擦材料。按照上述工艺制备的铜基摩擦复合材料的密度为5.453×103kg/m3,摩擦系数为0.388，磨损量为0.282cm3/MJ。 Prepare a high wear-resistant copper-based friction composite material, the weight percentage of each component is as follows: Cu powder: 45%, Fe powder: 25%, Cr powder: 5%, ZTA composite ceramic powder: 10%, MoS 2 powder: 2%, graphite powder: 13%. The preparation steps are as follows: 1) Weighing: Weigh Cu powder: 45%, Fe powder: 25%, Cr powder: 5%, ZTA composite ceramic powder: 10%, MoS 2 powder: 2%, Graphite powder: 13%; 2) Mixing: Mix the prepared raw material components Cu, Fe, Cr, ZTA composite ceramics, MoS 2 and graphite powder evenly with a high-speed mixer; 3) Press: Mix the uniformly mixed raw materials at 650MPa Press under pressure to obtain compact; 4) Pressurized sintering: fix the compact on the supporting steel back, put it into a vacuum sintering furnace for sintering, the vacuum degree is 0.1Pa, the sintering temperature is 900°C, the applied pressure is 1MPa, heat preservation After 2 hours, the powder metallurgy friction material was obtained. The copper-based friction composite material prepared according to the above process has a density of 5.453×10 3 kg/m 3 , a friction coefficient of 0.388, and a wear volume of 0.282cm 3 /MJ.
实施例2： Example 2:
制备一种铜基摩擦复合材料，其各组分重量百分比如下：Cu粉：60%、Fe粉：15%、Cr粉：10%、ZTA复合陶瓷粉：2%、MoS2粉：0.5%、石墨粉：12.5%。其制备步骤如下：1）称料：按重量百分比配比称量Cu粉：60%、Fe粉：15%、Cr粉：10%、ZTA复合陶瓷粉：2%、MoS2粉：0.5%、石墨粉：12.5%；2）混料：将配好的原料组分Cu、Fe、Cr、ZTA复合陶瓷、MoS2和石墨粉末经高速搅拌机混合均匀；3）压制：将混合均匀的原料在850MPa压力下压制得到压坯；4）加压烧结：将压坯固定在支撑钢背上，放入真空烧结炉中进行烧结，真空度为10Pa，烧结温度为750℃，施加压力为3MPa，保温时间4小时，得到粉末冶金摩擦材料。按照上述工艺制备的铜基摩擦复合材料的密度为5.531×103kg/m3,摩擦系数为0.381，磨损量为0.293cm3/MJ。 Prepare a copper-based friction composite material, the weight percentage of each component is as follows: Cu powder: 60%, Fe powder: 15%, Cr powder: 10%, ZTA composite ceramic powder: 2%, MoS 2 powder: 0.5%, Graphite powder: 12.5%. The preparation steps are as follows: 1) Weighing: Weigh Cu powder: 60%, Fe powder: 15%, Cr powder: 10%, ZTA composite ceramic powder: 2%, MoS 2 powder: 0.5%, Graphite powder: 12.5%; 2) Mixing: Mix the prepared raw material components Cu, Fe, Cr, ZTA composite ceramics, MoS 2 and graphite powder evenly with a high-speed mixer; 3) Press: Mix the uniformly mixed raw materials at 850MPa Press under pressure to obtain compact; 4) Pressure sintering: fix the compact on the supporting steel back, put it into a vacuum sintering furnace for sintering, the vacuum degree is 10Pa, the sintering temperature is 750°C, the applied pressure is 3MPa, and the holding time is After 4 hours, the powder metallurgy friction material was obtained. The copper-based friction composite material prepared according to the above process has a density of 5.531×10 3 kg/m 3 , a friction coefficient of 0.381, and a wear volume of 0.293cm 3 /MJ.
实施例3： Example 3:
制备一种高耐磨铜基摩擦复合材料，其各组分重量百分比如下：Cu粉：48%、Fe粉：22%、Cr粉：6%、ZTA复合陶瓷粉：8%、MoS2粉：1.8%、石墨粉：14.2%。其制备步骤如下：1）称料：按重量百分比配比称量Cu粉：48%、Fe粉：22%、Cr粉：6%、ZTA复合陶瓷粉：8%、MoS2粉：1.8%、石墨粉：14.2%；2）混料：将配好的原料组分Cu、Fe、Cr、ZTA复合陶瓷、MoS2和石墨粉末经高速搅拌机混合均匀；3）压制：将混合均匀的原料在650MPa压力下压制得到压坯；4）加压烧结：将压坯固定在支撑钢背上，放入真空烧结炉中进行烧结，真空度为0.1Pa，烧结温度为900℃，施加压力为1MPa，保温时间2小时，得到粉末冶金摩擦材料。按照上述工艺制备的铜基摩擦复合材料的密度为5.469×103kg/m3,摩擦系数为0.392，磨损量为0.285cm3/MJ。 Prepare a high wear-resistant copper-based friction composite material, the weight percentage of each component is as follows: Cu powder: 48%, Fe powder: 22%, Cr powder: 6%, ZTA composite ceramic powder: 8%, MoS 2 powder: 1.8%, graphite powder: 14.2%. The preparation steps are as follows: 1) Weighing: Weigh Cu powder: 48%, Fe powder: 22%, Cr powder: 6%, ZTA composite ceramic powder: 8%, MoS 2 powder: 1.8%, Graphite powder: 14.2%; 2) Mixing: Mix the prepared raw material components Cu, Fe, Cr, ZTA composite ceramics, MoS 2 and graphite powder evenly with a high-speed mixer; 3) Press: Mix the uniformly mixed raw materials at 650MPa Press under pressure to obtain compact; 4) Pressurized sintering: fix the compact on the supporting steel back, put it into a vacuum sintering furnace for sintering, the vacuum degree is 0.1Pa, the sintering temperature is 900°C, the applied pressure is 1MPa, heat preservation After 2 hours, the powder metallurgy friction material was obtained. The density of the copper-based friction composite material prepared according to the above process is 5.469×10 3 kg/m 3 , the friction coefficient is 0.392, and the wear volume is 0.285cm 3 /MJ.
实施例4： Example 4:
制备一种铜基摩擦复合材料，其各组分重量百分比如下：Cu粉：53%、Fe粉：18%、Cr粉：8%、ZTA复合陶瓷粉：4%、MoS2粉：0.8%、石墨粉：16.2%。其制备步骤如下：1）称料：按重量百分比配比称量Cu粉：53%、Fe粉：18%、Cr粉：8%、ZTA复合陶瓷粉：4%、MoS2粉：0.8%、石墨粉：16.2%；2）混料：将配好的原料组分Cu、Fe、Cr、ZTA复合陶瓷、MoS2和石墨粉末经高速搅拌机混合均匀；3）压制：将混合均匀的原料在850MPa压力下压制得到压坯；4）加压烧结：将压坯固定在支撑钢背上，放入真空烧结炉中进行烧结，真空度为10Pa，烧结温度为750℃，施加压力为3MPa，保温时间4小时，得到粉末冶金摩擦材料。按照上述工艺制备的铜基摩擦复合材料的密度为5.548×103kg/m3,摩擦系数为0.401，磨损量为0.293cm3/MJ。 Prepare a copper-based friction composite material, the weight percentage of each component is as follows: Cu powder: 53%, Fe powder: 18%, Cr powder: 8%, ZTA composite ceramic powder: 4%, MoS 2 powder: 0.8%, Graphite powder: 16.2%. The preparation steps are as follows: 1) Weighing: Weigh Cu powder: 53%, Fe powder: 18%, Cr powder: 8%, ZTA composite ceramic powder: 4 %, MoS2 powder: 0.8%, Graphite powder: 16.2%; 2) Mixing: Mix the prepared raw material components Cu, Fe, Cr, ZTA composite ceramics, MoS 2 and graphite powder with a high-speed mixer; 3) Compression: Mix the uniform raw materials at 850MPa Press under pressure to obtain compact; 4) Pressure sintering: fix the compact on the supporting steel back, put it into a vacuum sintering furnace for sintering, the vacuum degree is 10Pa, the sintering temperature is 750°C, the applied pressure is 3MPa, and the holding time is After 4 hours, the powder metallurgy friction material was obtained. The copper-based friction composite material prepared according to the above process has a density of 5.548×10 3 kg/m 3 , a friction coefficient of 0.401, and a wear volume of 0.293cm 3 /MJ.
实施例5： Example 5:
制备一种铜基摩擦复合材料，其各组分重量百分比如下：Cu粉：50%、Fe粉：20%、Cr粉：6%、ZTA复合陶瓷粉：8%、MoS2粉：1%、石墨粉：15%。其制备步骤如下：1）称料：按重量百分比配比称量Cu粉：50%、Fe粉：20%、Cr粉：6%、ZTA复合陶瓷粉：8%、MoS2粉：1%、石墨粉：15%；2）混料：将配好的原料组分Cu、Fe、Cr、ZTA复合陶瓷、MoS2和石墨粉末经高速搅拌机混合均匀；3）压制：将混合均匀的原料在750MPa压力下压制得到压坯；4）加压烧结：将压坯固定在支撑钢背上，放入真空烧结炉中进行烧结，真空度为1Pa，烧结温度为850℃，施加压力为2MPa，保温时间3小时，得到粉末冶金摩擦材料。按照上述工艺制备的铜基摩擦复合材料的密度为5.521×103kg/m3,摩擦系数为0.414，磨损量为0.273cm3/MJ。 Prepare a copper-based friction composite material, the weight percentage of each component is as follows: Cu powder: 50%, Fe powder: 20%, Cr powder: 6%, ZTA composite ceramic powder: 8%, MoS 2 powder: 1%, Graphite powder: 15%. The preparation steps are as follows: 1) Weighing: Weigh Cu powder: 50%, Fe powder: 20%, Cr powder: 6%, ZTA composite ceramic powder: 8%, MoS 2 powder: 1%, Graphite powder: 15%; 2) Mixing: Mix the prepared raw material components Cu, Fe, Cr, ZTA composite ceramics, MoS 2 and graphite powder evenly with a high-speed mixer; 3) Compression: Mix the uniformly mixed raw materials at 750MPa Press under pressure to obtain compact; 4) Pressure sintering: fix the compact on the supporting steel back, put it into a vacuum sintering furnace for sintering, the vacuum degree is 1Pa, the sintering temperature is 850°C, the applied pressure is 2MPa, and the holding time After 3 hours, the powder metallurgy friction material was obtained. The density of the copper-based friction composite material prepared according to the above process is 5.521×10 3 kg/m 3 , the friction coefficient is 0.414, and the wear volume is 0.273cm 3 /MJ.
本发明是通过实施例来描述的，但并不对本发明构成限制，参照本发明的描述，所公开的实施例的其他变化，如对于本领域的专业人士是容易想到的，这样的变化应该属于本发明权利要求限定的范围之内。 The present invention is described by the embodiment, but does not constitute limitation to the present invention, with reference to the description of the present invention, other changes of the disclosed embodiment, if it is easy to imagine for those skilled in the art, such changes should belong to Within the scope defined by the claims of the present invention.
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