CN111850384B - 一种高性能摩托车刹车盘材料及制备方法 - Google Patents
一种高性能摩托车刹车盘材料及制备方法 Download PDFInfo
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Abstract
摩托车刹车盘材料要求具有高的机械强度,很好的耐磨性,低密度以及良好的散热性能。目前由可锻铸铁、灰铸铁、合金钢等单一材质制成刹车盘不能满足实际综合性能需求。本发明设计了一种高性能摩托车刹车材料,先制备成分为C:2‑2.5%,Cr:4.0‑4.5%,Mo:3.5‑4.0%,V:8.5‑9%,W:1‑2%,Co:2‑3%,余量为Fe的合金粉末,然后烧结成具有一定强度和孔隙率的多孔体,然后将多孔体熔渗铝合金得到致密的块体材料,再通过合适的热处理最终得到高性能的摩托车刹车盘,该材料微观组织呈双连通的结构,其中铁基合金可提供高的耐高温强度和耐磨性能,铝合金可提供高的导热性能和低密度,因此最终材料具有高的耐磨、高温强度、高导热和低密度等优异的综合性能。
Description
技术领域
本发明涉及刹车材料技术领域,特别是指一种高性能摩托车刹车盘材料及制备方法。
背景技术
刹车盘是所有车辆制动系统必备的零部件,固定在车轴上与车轮一起转动,刹车时,制动块在钳夹活塞的推动下挤压到制动盘,通过制动块与刹车盘的摩擦力来降低车轮转速,达到车辆减速制动的目的。随着车辆的加速,刹车盘将承受制动块的压力和摩擦力赠大,在与制动块的相对运动中产生磨损,特别是在工作路面上有砂石等杂物时,磨损更为严重,极大地缩短刹车盘的使用寿命。因此制作刹车盘的材料即具有高的机械强度,又要有很好的耐磨性。目前的刹车盘通常采用可锻铸铁、灰铸铁、合金钢等单一材质制成,强度和耐磨性较差,不能满足实际使用需求。除了强度和耐磨性外,摩托车在刹车过程中,由于摩擦力的作用使制动盘与刹车片的温度瞬间升高,因此要求制动盘具有良好的散热性能。目前铸铁或钢质摩托车制动盘均存在散热差这一问题,为了增加制动盘的散热性能,在制动盘上布置了大量的通风孔,这也研制影响了制动盘整体的力学性能。另外,制动盘的轻量化也是目前的发展趋势,尽管有报道采用陶瓷摩擦盘来替代钢制摩擦盘,以降低密度,提高耐磨性,但是由于成本高,很难在普通摩托车上进行推广应用。因此研制轻质、高散热性、高强度和耐磨性的制动盘来替代传统的钢制盘成为摩托车刹车盘发展的当务之急。
发明内容
本发明针对目前铸铁和钢质刹车盘存在的问题,设计了一种新的摩托车刹车盘材料,该材料由高耐磨的合金钢与铝合金两种材料组成,微观组织呈双连通结构,铝合金可以提供高的散热性能,同时降低制动盘的密度,而合金钢则提供高的强度和耐磨性,因此所制备的制动盘具有摩擦系数稳定、强度高、耐磨性能好,导热性能好以及密度低等优异的综合性能。具体的发明内容为:
(1)首先采用气雾化技术制备合金粉末,其成分(质量百分比)为C:2-2.5%,Cr:4.0-4.5%,Mo:3.5-4.0%,V:8.5-9%,W:1-2%,Co:2-3%,余量为Fe。
(2)第二步,对上述成分的合金粉末进行筛分,然后选用粒度为5-25微米的合金粉末压制成形,压制压力80-100MPa。
(3)第三步,将压制坯体于真空炉中进行烧结,烧结温度为1260-1270℃,保温时间25-30分钟,得到合金多孔体。
(4)第四步,将合金多孔体于真空淬火炉中淬火,淬火加热温度为1100-1150℃,保温时间为40-60分钟,淬火介质为油,淬火后将多孔体清洗烘干,烘干温度为100-150℃,烘干时间60-90分钟。
(5)第五步,将多孔体置于压力熔渗炉中熔渗铝合金,其中熔渗之前先将多孔体预热,预热温度为600-650℃,预热时间为60-90分钟,预热的同时融化铝合金,根据摩托车时速的不同选用不同牌号的铝合金,时速低于90公里/小时,选用牌号为ZL101的铝合金,时速高于90公里/小时,选用牌号为ZL201的铝合金,预热完成后,将熔融的铝合金浇铸到多孔体上方,然后加压,铝合金在压力作用下会快速渗入到多孔体的孔隙中,熔渗加压压力为2-4MPa,熔渗保温保压时间为5-10分钟,然后随炉冷却到300℃以下出炉。
(6)第六步,将熔渗得到的致密材料进行热处理,热处理工艺根据铝合金牌号进行确定,选用ZL101铝合金,其热处理为:先将材料加热到495-505℃,保温时间4-6小时,然后水冷到室温,再于180-185℃进行时效处理,时效处理时间3-4小时;选用ZL201铝合金,其热处理为:先将材料加热到530-540℃,保温时间6-8小时,然后水冷到室温,再于170-180℃进行时效处理,时效处理时间3-4小时,经过时效处理后得到成品摩托车刹车盘。
本发明的优点在于:(1)先制备多孔铁基合金骨架,然后熔渗铝合金,可以形成双连通的结构,其中连通的多孔合金可提供高的耐高温强度和耐磨性能,铝合金可提供高的导热性能和低密度,使得所制备的材料克服单一材料的缺点,具有高的耐磨、高温强度、高导热和低密度等优异的综合性能;(2)所设计的铁基合金材料通过成分设计以及烧结后的淬火和熔渗前的预热保温处理(预热保温相当于高温回火),可形成高温回火马氏体组织,同时在回火马氏体中析出弥散分布的(V,W)C、(Cr,Fe)23C6等多种碳化物硬质相,其尺寸在1-2微米,可以保证合金具有优异的耐磨性能和耐高温强度;(3)本发明设计的合金成分粉末烧结温度低,烧结过程中会产生部分液相,因此烧结强度高,烧结后连通性能好,这可以进一步保证最终材料具有优异的耐高温强度和耐磨性能。
具体实施方式:
(1)制备时速小于90公里/小时的摩托车刹车盘材料首先采用气雾化技术制备合金粉末,其成分(质量百分比)为C:2%,Cr:4.5%,Mo:4%,V:9%,W:2%,Co:2%,余量为Fe;第二步,将制备的合金粉末进行筛分,然后选用粒度为2-25微米的合金粉末压制成形,压制压力80MPa;第三步,将压制坯体于真空炉中进行烧结,烧结温度1270℃,保温时间30分钟,得到合金多孔体。第四步,将合金多孔体于真空淬火炉中淬火,淬火加热温度为1150℃,保温时间为60分钟,淬火介质为油,淬火后将多孔体清洗烘干,烘干温度为150℃,烘干时间60分钟。第五步,将多孔体置于压力熔渗炉中熔渗铝合金,其中熔渗之前先将多孔体预热,预热温度为600℃,预热时间为90分钟,预热的同时融化铝合金,铝合金牌号为ZL101,预热完成后,将熔融的铝合金浇铸到多孔体上方,然后加压,铝合金在压力作用下会快速渗入到多孔体的孔隙中,熔渗加压压力为2MPa,熔渗保温保压时间为5分钟,然后随炉冷却到300℃以下出炉。第六步,将熔渗得到的致密材料进行热处理,其热处理工艺为:先将材料加热到495℃,保温时间4小时,然后水冷到室温,再于180℃进行时效处理,时效处理时间4小时,经过时效处理后得到成品摩托车刹车盘。
(2)制备时速高于90公里/小时的摩托车刹车盘材料
首先采用气雾化技术制备合金粉末,其成分(质量百分比)为C:2.5%,Cr:4.0%,Mo:3.5%,V:8.5%,W:1%,Co:3%。第二步,对上述成分的合金粉末进行筛分,然后选用粒度为5-25微米的合金粉末压制成形,压制压力100MPa。
第三步,将压制坯体于真空炉中进行烧结,烧结温度为1260℃,保温时间30分钟,得到合金多孔体。第四步,将合金多孔体于真空淬火炉中淬火,淬火加热温度为1100℃,保温时间为60分钟,淬火介质为油,淬火后将多孔体清洗烘干,烘干温度为150℃,烘干时间60分钟。第五步,将多孔体置于压力熔渗炉中熔渗铝合金,其中熔渗之前先将多孔体预热,预热温度为650℃,预热时间为60分钟,预热的同时融化铝合金,选用牌号为ZL201的铝合金,预热完成后,将熔融的铝合金浇铸到多孔体上方,然后加压,铝合金在压力作用下会快速渗入到多孔体的孔隙中,熔渗加压压力为4MPa,熔渗保温保压时间为10分钟,然后随炉冷却到300℃以下出炉。第六步,将熔渗得到的致密材料进行热处理,其热处理工艺为:先将材料加热到540℃,保温时间8小时,然后水冷到室温,再于180℃进行时效处理,时效处理时间3小时,经过时效处理后得到成品摩托车刹车盘。
Claims (1)
1.一种高性能摩托车刹车盘材料的制备方法,其特征在于:
(1)首先采用气雾化技术制备合金粉末,其成分质量百分比为 C:2-2.5%,Cr:4.0-4.5%,Mo:3.5-4.0%,V:8.5-9%,W:1-2%,Co:2-3%,余量为Fe;
(2)第二步,对上述成分的合金粉末进行筛分,然后选用粒度为5-25微米的合金粉末压制成形,压制压力80-100MPa;
(3)第三步,将压制坯体于真空炉中进行烧结,烧结温度为1260-1270℃,保温时间25-30分钟,得到合金多孔体;
(4)第四步,将合金多孔体于真空淬火炉中淬火,淬火加热温度为1100-1150℃,保温时间为40-60分钟,淬火介质为油,淬火后将多孔体清洗烘干,烘干温度为100-150℃,烘干时间60-90分钟;
(5)第五步,将多孔体置于压力熔渗炉中熔渗铝合金,其中熔渗之前先将多孔体预热,预热温度为600-650℃,预热时间为60-90分钟,预热的同时融化铝合金,根据摩托车时速的不同选用不同牌号的铝合金,时速低于90公里/小时,选用牌号为ZL101的铝合金,时速高于90公里/小时,选用牌号为ZL201的铝合金,预热完成后,将熔融的铝合金浇铸到多孔体上方,然后加压,铝合金在压力作用下会快速渗入到多孔体的孔隙中,熔渗加压压力为2-4MPa,熔渗保温保压时间为5-10分钟,然后随炉冷却到300℃以下出炉;
(6)第六步,将熔渗得到的致密材料进行热处理,热处理工艺根据铝合金牌号进行确定,选用ZL101铝合金,其热处理为:先将材料加热到495-505℃,保温时间4-6小时,然后水冷到室温,再于180-185℃进行时效处理,时效处理时间3-4小时;选用ZL201铝合金,其热处理为:先将材料加热到530-540℃,保温时间6-8小时,然后水冷到室温,再于170-180℃进行时效处理,时效处理时间3-4小时,经过时效处理后得到成品摩托车刹车盘。
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