CN110238380A - 一种石墨烯增强高速列车制动闸片材料及其制备方法 - Google Patents
一种石墨烯增强高速列车制动闸片材料及其制备方法 Download PDFInfo
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Abstract
本发明涉及一种石墨烯增强高速列车制动闸片材料及其制备方法,属于粉末冶金摩擦材料技术领域,解决高速列车制动闸片材料强度、耐磨性和耐高温性能要求高的技术问题,解决方案为:其原料由基体组元、基体增强组元、摩擦组元和润滑组元,各组元的质量百分比含量之和为100%,具体由铜粉、石墨烯或氧化石墨烯、铁粉、氧化铬、氧化锆、石墨和二硫化钼组成,制备过程包括球磨、混料、模压、烧结四个工艺段。本发明制备的石墨烯增强高速列车制动闸片,具有强度高、耐温性和耐磨性好的特点,可完全满足时速350Km/h及以上速度高速列车的制动要求。
Description
技术领域
本发明属于粉末冶金摩擦材料技术领域,具体涉及的是一种石墨烯增强高速列车制动闸片材料及其制备方法。
背景技术
高速列车满载近1000吨,最高运行时速达400Km/h,依靠制动闸片和制动盘的摩擦消耗列车的动能达到制动目的,特别是高速紧急制动情况下,制动闸片和制动盘瞬间承受巨大的摩擦力和剪切力,工作条件极其恶劣,对制动摩擦材料的强度、耐热性和耐磨性等方面提出了很高的要求。
石墨烯是一种由碳原子组成六角型呈蜂巢晶格的二维碳纳米材料,具有优异的力学和热传导性能,拉伸强度为130GPa,导热系数高达5300W/m.K,是目前已知的强度最高、导热系数最高的材料之一。为了满足高铁制动对材料性能的苛刻要求,本发明在摩擦材料中加入石墨烯,利用石墨烯微观尺度上的特殊性能对制动摩擦材料的耐热性和耐磨性进一步增强。
发明内容
本发明所要解决的技术问题是:利用石墨烯的优异的力学和热传导性能,通过与金属基体复合,进一步增强材料的强度、耐磨性和耐高温性能,制备出高性能的高速列车制动闸片材料。
本发明利用氧化石墨烯的化学活性与基体金属粉末首先进行机械合金化,解决石墨烯在金属基体中的分散和界面结合问题,实现对金属基体增强;然后,再加入润滑组元和摩擦组元,均匀混合后进行成型和烧结,制备高性能的石墨烯增强高速列车制动闸片材料。本发明制备的石墨烯增强高速列车制动闸片,具有强度高、耐高温性和耐磨性好的特点,可完全满足时速350Km/h及以上速度高速列车的制动要求。
本发明通过以下技术方案予以实现。
一种石墨烯增强高速列车制动闸片材料,其中:它包括基体组元、基体增强组元、摩擦组元和润滑组元,各组元的质量百分比含量之和为100%;
所述基体组元为铜粉,所述铜粉为雾化铜粉或者为电解铜粉,基体组元的质量百分比含量为45~70%;
所述基体增强组元由石墨烯和铁粉组成,或者由氧化石墨烯和铁粉组成,所述铁粉为还原铁粉,铁粉的质量百分比含量为3-20%,石墨烯或者氧化石墨烯的质量百分比含量为0.2-2%;
所述摩擦组元由氧化铬粉和氧化锆粉组成,摩擦组元的质量百分比含量为6-15%;
所述润滑组元由石墨和二硫化钼组成,润滑组元的质量百分比含量为5-18%。
一种石墨烯增强高速列车制动闸片材料的制备方法,包括以下步骤:
S1、按质量百分比含量称取铜粉与石墨烯或氧化石墨烯,将称取的原料放入真空球磨罐中球磨5-15分钟,通过机械合金化将石墨烯均匀混入基体组元中;
S2、按质量百分比含量向步骤S1球磨后的原料中加入摩擦组元和润滑组元,进行混料、模压、烧结,制得石墨烯增强高速列车制动闸片用材料,其中模压成型压力为300-500 MPa,烧结温度为900-1000℃,恒温时间1-4小时,保护气为氢气。
与现有技术相比,本发明的有益效果为:
本发明制备的石墨烯增强高速列车制动闸片的材料,具有强度高、耐高温性和耐磨性好的特点,可完全满足时速350Km/h及以上速度高速列车的制动要求。
具体实施方式
下面结合实施例对本发明作进一步的详细描述。
实施例1
把60份电解铜粉和1.5份石墨烯放入真空球磨罐中球磨10分钟,取出后放入混料机中,同时加入还原铁粉3份、氧化铬粉6份、氧化锆粉4份、石墨粉10份、二硫化钼2份进行混合。混合均匀后,放入模具中模压成型,成型压力300 MPa,然后放入烧结炉中进行烧结,烧结温度为1000℃,氢气气氛,恒温1小时,制得石墨烯增强高速列车制动闸片用材料。
实施例2
把45份雾化铜粉和0.2份石墨烯放入真空球磨罐中球磨5分钟,取出后放入混料机中,同时加入还原铁粉20份、氧化铬粉10份、氧化锆粉5份、石墨粉13份、二硫化钼5份进行混合。混合均匀后,放入模具中模压成型,成型压力500 MPa,然后放入烧结炉中烧结,烧结温度为950℃,氢气气氛,恒温2小时,制得石墨烯增强高速列车制动闸片用材料。
实施例3
把70份电解铜粉和2份石墨烯放入真空球磨罐中球磨15分钟,取出后放入混料机中,同时加入还原铁粉8份、氧化铬粉5份、氧化锆粉1份、石墨粉4份、二硫化钼1份进行混合。混合均匀后,放入模具中模压成型,成型压力400 MPa,然后放入烧结炉中烧结,烧结温度为900℃,氢气气氛,恒温4小时,制得石墨烯增强高速列车制动闸片用材料。
以上所述,仅为本发明的具体实施方式,但本发明的保护范围并不局限于此,任何熟悉技术领域的技术人员在本发明揭露的技术范围内,可轻易想到的变化或替换,都应涵盖在本发明的保护范围之内。因此,本发明的保护范围应以所述权利要求的保护范围为准。
Claims (2)
1.一种石墨烯增强高速列车制动闸片材料,其特征在于:它包括基体组元、基体增强组元、摩擦组元和润滑组元,各组元的质量百分比含量之和为100%;
所述基体组元为铜粉,所述铜粉为雾化铜粉或者为电解铜粉,基体组元的质量百分比含量为45~70%;
所述基体增强组元由石墨烯和铁粉组成,或者由氧化石墨烯和铁粉组成,所述铁粉为还原铁粉,铁粉的质量百分比含量为3-20%,石墨烯或者氧化石墨烯的质量百分比含量为0.2-2%;
所述摩擦组元由氧化铬粉和氧化锆粉组成,摩擦组元的质量百分比含量为6-15%;
所述润滑组元由石墨和二硫化钼组成,润滑组元的质量百分比含量为5-18%。
2.一种如权利要求1所述的石墨烯增强高速列车制动闸片材料的制备方法,其特征在于包括以下步骤:
S1、按质量百分比含量称取铜粉与石墨烯或氧化石墨烯,将称取的原料放入真空球磨罐中球磨5-15分钟,通过机械合金化将石墨烯均匀混入基体组元中;
S2、按质量百分比含量向步骤S1球磨后的原料中加入摩擦组元和润滑组元,进行混料、模压、烧结,制得石墨烯增强高速列车制动闸片用材料,其中模压成型压力为300-500 MPa,烧结温度为900-1000℃,恒温时间1-4小时,保护气为氢气。
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CN113073227A (zh) * | 2021-03-25 | 2021-07-06 | 南昌工程学院 | 一种高电导率形变Cu-Fe系原位复合材料的制备方法 |
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CN114713816A (zh) * | 2022-04-29 | 2022-07-08 | 北京斯年智驾科技有限公司 | 石墨烯陶瓷发热材料 |
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CN112059189A (zh) * | 2020-08-24 | 2020-12-11 | 北京科技大学 | 一种宽温域摩擦系数稳定的粉末冶金制动闸片及制备方法 |
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