CN104947030A - 用于制造制动盘的方法及制动盘 - Google Patents
用于制造制动盘的方法及制动盘 Download PDFInfo
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Abstract
本发明涉及用于制造用于车辆的制动盘(1)的方法,其中,摩擦层(11)被设置在制动盘(1)的基体(2)上的至少某些区域中。提出了所述方法至少包括以下步骤:至少在某些区域中预加工呈现为坯料的基体(2);加热所述基体(2);在包括基础金属合金的熔液中浸泡已加热的基体(2),从而使功能层(10)形成在基体(2)和将要被应用的摩擦层(11)之间,以及至少在某些区域中通过热喷涂工艺的方式应用摩擦层(11)。
Description
本发明涉及用于制造用于车辆的制动盘的方法,还涉及用于车辆的制动盘。
DE AS 1 625 680涉及一种用于湿式离合器和制动器的摩擦体,其具有载体和配合载体的至少一个烧结的、多孔的和金属的摩擦衬片。所提出的是摩擦衬片由金属纤维构成,目的是孔隙度的程度为至少50%。
从DE 10 2010 049 797 A1中所知道的是制动盘能够与轮毂整体制造,因此对于制动盘的轴向摆动被降低应该是可能的。此外,该制动盘的摩擦表面能够被提供有摩擦涂层,所述摩擦涂层能够由硬金属或由陶瓷组成。
EP1 987 267 B1涉及一种基于材料的使用的制动盘,其中之一是执行结构功能,另一个是执行制动功能。该制动盘包括支承或结构盘,其侧面配备有第一和第二摩擦盘。摩擦盘由适合于执行制动功能的材料制造。结构盘由复合材料制造。结构盘的复合材料能够由树脂构成,从环氧树脂、酚醛树脂、氰酯、氰环氧树脂和陶瓷树脂及釉质或它们的组合之一中任选。该摩擦盘能够由从钢、铸铁、铝合金、铝氧化物(陶瓷)、碳化硅、氮化硅、碳化钛及碳陶瓷中所选择的材料来制造。
在车辆中,特别是在机动车辆中,盘式制动器是制动系统的目前最常见的类型。盘式制动器实质上由制动盘和在边缘上包围制动盘的制动钳组成。这里,制动盘被连接到车辆的车轮,所述车轮经由可旋转地安装在转向节内的轮毂制动。与此相反,制动钳被固定到转向节。实际减速是由制动块实现的,所述制动块能够靠着制动盘放置并且被设置在制动盘和制动钳之间的制动盘的两侧上。
根据不同的应用,制动盘能够由例如灰铸铁(GCI)的铁、或者碳陶瓷或者铝二者组成。
制动盘典型地是由非合金灰铸铁(GCI)材料铸造。虽然这种类型的盘能够被节约成本地铸造和加工,但它们担负不起对抗来自路面的喷淋水或雨水的足够的腐蚀保护。特别是在冬季,能够观察到由道路盐增加的腐蚀攻击。如果车辆随后停放相当长的一段时间,在摩擦环区域内的灰铸铁表面上的严重腐蚀可能具有制动衬片比如说在制动盘上生锈出固体的结果。这能够被归因于制动盘中的衬片永久紧靠着盘表面,并且铁锈能够因此在这种窄间隙中形成的事实。当车辆随后被再次移动时,已经生锈的衬片材料可能被从衬片中撕出并转移到制动盘表面上。这导致与高的噪声生成联合的制动器的抖动。在某些情况下,可能有必要更换盘或通过车削去除附着的铁锈。另外,如果能够通过高档外观的铝轮辋看到生锈的盘,生锈的制动盘似乎是不符合标准的。
此外,公知的是GCI制动盘的耐磨性不够高。通常使用的制动衬片被优化用于特定的摩擦系数,为此,接受带有磨料磨损的摩擦环的一定载荷。这种磨料载荷具有的效果尤其是带有雨天后红锈形成的制动盘是当汽车被下一次驱动时再次通过制动器的驱动的金属毛坯。
制动衬片和制动盘之间的磨损形成颗粒物排放,即细粉尘。除了与细粉尘相关的问题,与昂贵的、高级铝轮辋相结合的生锈制动盘的视觉效果无论如何也起着额外的作用。公知的是大约70%的细粉尘颗粒起源于GCI盘材料。这些磨损颗粒是在约700℃的非常高的温度上撞击铝轮辋。在这个过程中,它们能够很容易地在铝表面上燃烧成透明涂层,并且即使在洗车清洗工厂利用加强的维护,去除灰黑色涂层也是非常困难的。而且,在相对长的静止之后的已生锈的衬片的情况下,锐音噪声或制动器抖动额外地被视为令人讨厌的。
因此,为了提高制动盘的耐腐蚀性和耐磨损性二者,在世界范围内进行加强的开发工作。在这方面,例如盘由高级铸钢材料制成。虽然与腐蚀相关的问题能够在这种情况下被消除,但耐磨损性仅仅略微提高。除了由战略上重要的元素(如铬和镍)的使用导致的高成本之外,耐磨损性仅被轻微改善。此外,热导率显著地降低,作为其结果,车轮轴承可能经受更大的热载荷。
此外,已经提出大量的电镀涂覆工艺,以解决所述问题。这些层的制造是非常复杂的:为该目的,有必要例如用铬或镍或镍加硬质材料颗粒对整个组件进行涂覆。情况往往是这种性质的层也必须通过扩散退火处理被锚定到基底材料,以应付制动器的载荷。
另一种可能性通过热喷涂工艺来代表:为该目的,GCI盘通过仿形车削和随后的刚玉喷砂被粗糙化,然后被提供有例如具500微米厚度的17%Cr钢喷涂层。粉末和丝材喷涂工艺被用于该目的。涂覆之后,粗糙的喷涂层必须通过车削或磨削再加工,以符合所要求的制动盘的尺寸。然而,在该喷涂涂层中,仅摩擦面的区域被涂覆,因此轮毂区域必须——如目前所通用的——通过上漆来保护,以防止生锈。对于通风式制动盘,喷涂过程能够当然产生对于盖盘之间的区域的无腐蚀保护,并因此所述网仍然倾向于变为生锈的,且锈水将随后流过带有昂贵喷涂层的摩擦表面。此外,在盐雾试验中发现,由于微孔结构热喷涂层被渗透,作为其结果,可能出现下层腐蚀。这种腐蚀仅能够通过昂贵的密封工艺来防止。仅用于——例如,利用具有500微米厚度的再研磨17%Cr钢喷涂层的——涂覆GCI盘的支出就大于通过铸造加机械再加工的用于相同盘的迄今的整个产品。
在GCI盘或带有研磨热喷涂层的盘的情况下,制动衬片具有表面上的磨损效果,材料通过在每个制动操作上的磨损被去除。虽然材料去除在硬质喷涂层的情况下少得多,但磨损机制被保留下来。
也可能提供被称为临时的、节约成本的保护层,从而在车辆至少从制造商转移给最终消费者时,不会全新车辆已具有生锈的制动盘。这些是通常是含有锌染料的有色喷涂层。另一方面,制动系统公知的在其中锌在制动操作期间被涂擦到GCI表面上,作为结果,出现阴极腐蚀保护。另一方面,这种锌膜对制动衬片的摩擦功能具有负面影响,并且摩擦系数下降。在该方面,锌保护层是方便地距初始操作很远的路。
铁氮化物基础上的氮化扩散涂层也是可能的。这种涂层产生抗磨损和腐蚀的临时保护,但该涂层的使用寿命实际上似乎被限制为小于40000公里,而且也仅适合用于在美国市场上的NAO衬片。这是因为,例如, 在德国,速度限制高得多,而且在某些情况下根本不存在,制动器温度预期比例如在美国更高,因此NAO衬片似乎适合美国。此外,该方法由于要求大的炉腔是非常耗时和非常昂贵的。
大量的热喷涂工艺(这些已在上面提到)和电镀涂覆工艺被类似地使用。这些层的制造是非常复杂的。然而,在盐雾试验中,这种类型的电镀涂层和热喷涂涂层二者完成地相当差。因而,即使有额外的密封过程,热喷涂层的渗透不能被可靠地避免。
根据所表明的现有技术,作为大批量制造的物品的制动盘的简单和可持续的制造仍然给予改进的余地。
与上述背景技术相对,本发明是基于呈现一种用于制造用于车辆的制动盘的方法的目的,其使节约成本或者可持续大量制造成为可能。另外,目的是详细说明一种用于车辆的制动盘,除了节约成本的制造,其尤其具有改进的抗腐蚀性攻击性和改进的使用寿命。
所述目标的方法相关的部分通过具有权利要求1的特征的方法来实现。所述目标的产品相关的部分通过具有权利要求9的特征的制动盘来实现。本发明的其他具体的优化改进在相应的从属权利要求中公开。
应当指出,在以下的说明中单独详细说明的特征和措施也可以以任何期望的技术上有意义的方式与彼此结合并公开本发明的改进。所述说明具体地与附图相结合进一步特征化和详细说明了本发明。
根据本发明,在下文中所提出的是一种用于制造用于车辆的制动盘的方法,其中,摩擦层被设置在至少基体上的某些区域中。根据本发明,所述方法至少包括以下步骤:
至少在某些区域中预加工呈现为坯料的基体;
加热所述基体;
在包括基础金属合金的熔液中浸泡已加热的基体,从而使粘附促进涂层形成在基体和将要被应用的摩擦层之间;
至少在某些区域中通过热喷涂工艺的方式向基体应用摩擦层。
为了本发明的目的,预加工至少在某些区域中以坯料呈现的基体包括实际上以这样一种方式来完成制动盘,即后加工能够任选地也在个别涂覆操作之后被产生。整个基体,即全部制动盘被浸泡在基础金属熔液中是有利的。为了本发明的目的,包括基础金属的熔液是铝和/或锌合金熔液。与优选在保护气体气氛下以500℃至700℃的温度对基体的预加热相关联,基础金属,即例如铝和/或锌,扩散进入基底材料,即进入基体的灰铸铁中。这形成具有非常高粘附强度的冶金结合,其中这种粘附促进剂涂层不是像直接应用的热喷涂层那样的微孔,因此也不能被渗透。此外,根据本发明的铝和/或锌合金熔液具有阴极防腐保护被形成的效果,即使对于可能存在的缺陷或在由于远程操作被关闭的操作期间出现的损坏区域也是可能的,从而出现自修复。
制动盘,即其基体,优选通过砂铸制造。在这种情况下,基体,即坯体,具有被提供为用于与制动钳的制动块相接触的圆形外制动周缘,制动块或制动衬片当然作用在制动周缘的两侧,即摩擦表面。开口被提供在基体的中心,设置在基体的突出部中。穿过突出部的五个通道孔优选以等间隔围绕开口设置。所述通道孔用于接收车轮螺栓,借由所述车轮螺栓,制动盘能够与车轮一起被连接到轮毂。也能够被称为盘帽结构的突出部能够与制动周缘一体制造,即能够铸造,或者能够作为单独的元件以适当的方式被连接到制动周缘。基体能够被制造为不通风式或通风式制动盘,其本身是公知的。在通风式制动盘的情况下,摩擦表面被设置在盖盘上,相对的盖盘借由肋条间隔开。每个盖盘当然也仅具有一个摩擦表面,但这本身是公知的。气隙从而形成在盖盘之间,但这本身也是公知的,因此没有提供与其相关的进一步的细节。
由于整个制动盘浸泡在热浸池中,它也被完全覆盖,即完全地带有粘附促进剂层。在这里这是有利的,因为通过热浸涂覆的方式一气呵成,位于实际摩擦表面外侧的区域因而也提供有粘附促进剂层,即提供有腐蚀保护,因此用于保护这些区域的其他特殊的措施能够被省去。本发明对于通风式制动盘是特别合适的,因为通过浸泡池方式,除了其他区域,盖盘的两个整体内表面以及肋条被完全覆盖。
一旦粘附促进剂层已经通过热浸浴的方式被应用,在进一步的步骤中能够提供的是基体,即制动盘,特别是摩擦表面被车削到尺寸。
本发明是基于对所选择的基础金属合金,特别是铝合金形成“软”涂层的理解。这种情况实际上对于制动盘是负面的,但是,在本发明中,提供一种理想的用于后续热涂覆的粘附促进剂涂层。
在该工艺中,硬质材料粉末通过优选的高速火焰喷涂(HP-HVOF)的方式被注入至少在摩擦环的区域中的粘附促进剂涂层的软表面,该区域即摩擦表面,以便产生硬质材料颗粒和粘附促进剂层之间的紧密结合。
对于本发明的目的而言,如果应用测量的30微米至50微米的很薄的摩擦层在这里就足够了。在这方面,摩擦层本身不用作耐磨层,而是根据本发明用于将材料颗粒从制动衬片的衬片材料去除,即撕裂,从而形成转印膜,在本发明的范围内。在制动操作期间,衬片材料因此被撕出制动器衬片,并被转移到在摩擦环的区域中的表面,即例如铝表面或锌表面。这种转印膜嵌入摩擦环的示例性铝表面的微粗糙表面。摩擦在这里不通过磨损,而是通过粘附类型实现。转印膜永久保留在摩擦环上并保护铝表面不受磨损,因此制动盘几乎不必进行整修和更换。与此相反,制动衬片是以磨损部分的形式,并且不断地递送用于稳定转印膜的新材料。如果粘附促进剂层包括锌或锌组分,很明显,转印膜也嵌入锌表面,从而使后者也被保护不受磨损。然而,这也意味着如上所述的锌的摩擦系数由于转印膜没有影响。
在这方面,在根据本发明的方法中,不要求复杂的喷砂操作,也不要求复杂的再研磨操作。相反,热应用的喷涂层,即摩擦层在粗糙状态下被制成。
在可能的实施例中,碳化钨(WC)喷涂粉末作为喷涂粉末被热应用到粘附促进剂层。在优选的改进中,热应用碳化钨喷涂粉末,即例如WC-Co-Cr粉末。然而,为了本发明的目的也可以设想与WC或TiC颗粒合并的作为基质的FeNiCr粉末。所述颗粒能够具有大于30微米至50微米厚度的摩擦层的直径。尖锐边缘的颗粒因而从摩擦层突出部,并因此产 生转印膜。在这方面,尖锐边缘的硬质材料颗粒是当其被注入粘附促进剂层,从而产生被要求用于形成转印膜,即转印层的(微)粗糙硬质材料层。在这里,在本发明中不需要迄今在常规的热喷涂工艺中已经被要求的预喷砂操作。除了至少在摩擦表面的区域内通过热浸池的方式被应用的粘附促进剂层车削为制动盘的最终尺寸,不要求通过HVOF工艺的方式被应用的硬质材料层的进一步的后加工。例如,在摩擦环的区域中完成的粘附促进剂层能够具有200微米的厚度。
粘附促进剂层也能够被称为功能层,并且具有可以说是双重功能。一方面,所讨论的层也用作用于位于摩擦表面(也防止红锈)外侧的制动盘的区域的腐蚀保护。另一方面,所述层同时用作用于通过优选的HP-HVOF工艺的方式的(微)粗糙硬质材料层的应用的粘附促进剂。
基体,即制动盘从GCI制造。由HP-HVOF工艺涂覆的铝制动盘当然也是可能的。
根据本发明,制动盘由上述工艺步骤制造。在这方面,根据本发明的制动盘具有被应用到其基底材料并且在其上设置有至少在某些区域中的硬质材料层的粘附促进剂层。
在这里,粘附促进剂层被设置于整个制动盘。这意味着不仅摩擦表面而且后者外侧的所有区域被提供,即被覆盖,有粘附促进剂层。在优选实施例中,粘附促进剂层通过将制动盘浸泡在基础金属熔液中应用。完成之后,即例如至少在摩擦环的区域中车削至最终尺寸之后,粘附促进剂层具有200微米的厚度。摩擦层被设置在粘附促进剂上,但优选仅设置在制动盘的摩擦表面的区域中。制动块借由它们的衬片作用在摩擦表面上。由于摩擦层的尖锐边缘的硬质材料,制动衬片材料被撕裂出制动衬片,从而形成转印膜。制动衬片因而变成被磨损的,制动盘的磨损被避免。
本发明的其他有利的细节和效果将在下文在附图中所示的各种示例性实施例的基础上进行说明。附图中:
图1是平面图中的根据本发明的制动盘的示意图,
图2示出了透视图中的通风式制动盘,
图3示出了局部剖视图中的图2中示出的制动盘,以及
图4示出了能够在图3中看到的部分的放大图。
在不同的附图中,相同部分总是提供有相同的附图标记,并因此所述部分总体上也仅被描述一次。
图1示出了根据本发明的制动盘1的示意图。所述制动盘具有由例如铸铁,即例如灰铸铁(GCI)制成的圆形基体2。基体2通常具有圆形外制动周缘3,其被提供为用于与制动衬片(未更详细地示出)接触。开口4被提供在基体2的中心,被设置在基体2的突出部5中。突出部5也可以被称为盘帽结构5。在目前情况下,穿过突出部5的5个通道孔6以均匀间隔围绕开口4设置。所述通道孔6用于接收车轮螺栓(在此处未更详细地示出),借由所述车轮螺栓,制动盘1能够与车轮(未示出)一起被连接到轮毂(同样未示出)。
图2示出了具有盖盘7和8的制动盘1,在所述盖盘7和8之间设有有肋条9,从而形成通风式制动盘1。盖盘7和8各自具有在外侧上的制动周缘3。
图3示出了图2中所示的内部通风式制动盘1的部分截面。
可以看到功能性涂层10。也能够被称为粘附促进剂层10的功能性涂层10已被应用为覆盖整个制动盘1。
对于功能性涂层10的应用,制动盘1优选在保护气体气氛下被加热到500℃至700℃的温度。被加热的制动盘1随后被浸泡在基础金属熔池中。熔池能够是铝和/或锌合金熔液。
浸泡熔池之后,制动表面设置在其上的制动盘1,至少制动周缘3被加工到尺寸,功能层10优选在加工后在制动周缘3处仍然具有200微米的厚度。
制动盘1被完全浸泡在热镀池中,从而使所有区域,即所有部件2到6也被覆盖有功能层10。特别是在内部通风式制动盘1的情况下,所述情况是两个盖盘7和8不仅外部,而且内部被覆盖有功能层10。此外,肋条9也被覆盖有功能层10。
制动盘1因而还具有防腐蚀保护,如其在相应的制动周缘3外侧那样。
在进一步的制造步骤中,通过热喷涂工艺的方式涂敷制动盘1,特别是相应的制动周缘3,即优选的摩擦表面。在这种情况下,通过高速火焰喷射(HVOF)的方式至少在具有粘附促进剂层10的摩擦表面的区域中应用硬质材料粉末。
在其摩擦表面的区域中,制动盘1因而优选具有通过优选的HVOF工艺的方式应用的并具有30微米至50微米厚度的摩擦层11。硬质材料粉末通过HVOF的方式利用已结合的尖锐边缘的颗粒12被注入软的粘附促进剂层10,以便产生硬质材料颗粒和粘附促进剂层10之间的紧密(机械)结合。
硬质材料颗粒12具有尖锐的边缘,并具有大于摩擦层11的厚度的直径。颗粒12因此从摩擦层11的表面突出(图4)。如能够进一步在图4中看到的,一些颗粒12也与“软”粘附促进剂层10啮合,某些颗粒12同样也被嵌入摩擦层11,即不突出。能够在图4中看到的颗粒12具有比摩擦层11的厚度小的直径,但是仍从摩擦层11突出。
在制动操作期间,在制动衬片与摩擦面即在目前的情况下与摩擦层11进行接触期间,由于尖锐边缘颗粒12的作用,制动衬片材料被撕出制动衬片,并被转移到摩擦表面的表面上,从而形成转印膜或转印层。这种转印膜嵌入微粗糙表面。转印膜保留在表面上,并且因而保护制动盘1,即保护粘附促进剂层10不受磨损。与此相反,制动衬片是以磨损部件的形式并不断地递送新材料,以稳定转印膜。
附图标记列表:
1 制动盘
2 基体
3 制动周缘(Bremskranz)
4 开口
5 突出部/盘帽结构(Ausstellung/Scheibenhut)
6 通道孔
7 盖盘(Deckscheibe)
8 盖盘
9 肋条
10 功能性涂覆/粘结促进剂层(Funktionsbeschichtung/Haftvermittlerschicht)
11 摩擦层
12 颗粒。
Claims (11)
1.一种用于制造用于车辆的制动盘(1)的方法,其中,摩擦层(11)被设置在制动盘(1)的基体(2)上的至少某些区域中,
所述方法至少包括以下步骤:
至少在某些区域中预加工呈现为坯料的基体(2);
加热所述基体(2);
在包括基础金属合金的熔液中浸泡已加热的基体(2),从而使功能层(10)形成在基体(2)和将要被应用的摩擦层(11)之间,以及
至少在某些区域中通过热喷涂工艺的方式应用摩擦层(11)。
2.如权利要求1所述的方法,
其中,
整个基体(2)被浸泡在熔液中,从而使其完全被功能层(10)覆盖。
3.如权利要求1或2所述的方法,
其中,
基体在保护气体气氛下被加热到500℃和700℃之间的温度。
4.如上述权利要求之一所述的方法,
其中,
在基体(2)已经被浸泡在熔液中之后的进一步的步骤中,至少其中的制动周缘(3)被加工到尺寸,功能层(10)在完成后可具有200微米的厚度。
5.如上述权利要求之一所述的方法,
其中,
熔融金属团包括铝或锌合金。
6.如上述权利要求之一所述的方法,
其中,
通过高温火焰喷涂的方式应用摩擦层(11)。
7.根据上述权利要求之一所述的方法,
其中,
通过硬质材料粉末的应用的方式形成摩擦层(11),摩擦层(11)具有30微米至50微米的厚度。
8.如上述权利要求之一所述的方法,
其中,
颗粒(12)至少部分从摩擦层(11)突出,和/或其中,摩擦层(11)已经结合了颗粒(12),其直径大于摩擦层(11)的厚度,从而使颗粒(12)从摩擦层突出。
9.一种用于车辆的制动盘,其中,摩擦层(11)被设置在制动盘(1)的基体(2)上的至少某些区域中,所述制动盘具体地通过上述权利要求之一所述的方法制造,
其中,
粘附促进剂层(10)被设置在摩擦层(11)和基体(2)之间,并且被设置在全部基体(2)上,从而完全围绕基体(2)。
10.如权利要求9所述的制动盘,
其中
颗粒(12)被设置在摩擦层(11)中,并从摩擦层(11)突出。
11.如权利要求9或10所述的制动盘,
其中,
在完成之后,粘附促进剂层(10)具有200微米的厚度,摩擦层具有30微米至50微米的厚度。
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CN110099769A (zh) * | 2016-12-22 | 2019-08-06 | 浦项产业科学硏究院 | 制动盘及其制造方法 |
CN110678665A (zh) * | 2017-05-19 | 2020-01-10 | 大陆-特韦斯股份有限公司 | 用于制动盘的摩擦环、制动盘、以及对应的生产方法 |
CN113811698A (zh) * | 2019-05-18 | 2021-12-17 | 罗伯特·博世有限公司 | 用于摩擦制动器的摩擦制动体、摩擦制动器以及制造方法 |
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DE102014205666A1 (de) | 2015-10-01 |
US20150307979A1 (en) | 2015-10-29 |
CN104947030B (zh) | 2019-06-11 |
US10274032B2 (en) | 2019-04-30 |
RU2015110717A (ru) | 2016-10-20 |
RU2015110717A3 (zh) | 2018-11-30 |
US20170122393A1 (en) | 2017-05-04 |
US9574260B2 (en) | 2017-02-21 |
RU2678539C2 (ru) | 2019-01-29 |
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