CN103402756A - 制造无铅镀铝滑动轴承的方法 - Google Patents
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Abstract
在一种滑动轴承的制造方法中,一种铝-铁-硅合金被轧制在钢背上,其中铁与硅的比例为2:1至4:1。滑动轴承的滑动表面具有这样的铝-铁-硅合金。
Description
技术领域
本发明涉及一种制造铝铁硅合金滑动轴承的方法。本发明还进一步涉及一种具有铝铁硅合金的滑动面的滑动轴承。
背景技术
在滑动轴承特别是用于内燃机的连杆轴承的生产过程中,必需使用具有高耐磨性能的材料。此外,这种合金具有极易获得且价格低廉的特性,可以方便地使用。而且,该滑动轴承的材料有合适的硬度,能够理想地确保发动机中硬粒子(污染物)良好的可嵌入性。
在过去,合金曾被频繁的使用于滑动轴承,随着越来越多合金元素的添加,滑动轴承的化学成分也越来越复杂。关于应用于发动机的一对滑动组件,DE10 2005 047 0037A1的德国专利公开了一种用于液压系统或内燃机的铝基合金滑动元件,其需要在混合/边界摩擦条件下和/或流体力学的摩擦状况下运行,也包括空运行,能有这样的特点在于它在材料的体积上和/或铝基合金的摩擦表面上含有至少质量分数为80%的铝。
US2003/0185701A1描述了一种铝铁钒硅合金产品的制造方法,所述方法得到的合金能够具有高强度和高耐磨性。在这个申请中,对主要金属间相进行改性,同样对枝晶间硅化物相进行改性,加入镁元素或含镁合金对熔体进行改性。DE 10 2004 025 557 A1和US 2009-0245702 A1阐述了进一步的现有技术。
发明内容
本发明意在提供一种滑动轴承的制造方法,其所使用的合金与传统的镀层无铅铝材料相比,具有更简单的化组成分和简洁的制造方法,同时滑动性能还得以改善。
该主旨将通过权利要求1所述的方法得到解决。
根据前述,一种滑动轴承通过将铝铁硅合金轧制到钢背上制造得到。铝铁硅合金密度低,这对于生产的组件是有利的,因为这也就意味着组件的重量轻。此外,铝铁硅合金具有适中的硬度,这对于应用于滑动轴承是有利的,因为这意味着与滑动轴承接触的材料损耗很少。而且,所述材料价格便宜,所述合金因其组成也容易生产。
权利要求2-11描述了本发明所述方法的优选实施方式。
优选的是,所述合金包含高达10%的铁和高达3%的硅。所有文本中所涉及的%为重量百分含量。通过所述方法,使得所得到的合金的最终硬度可以调整。
按照本发明,铁和硅的比例为2:1至4:1。最终可以形成铁硅化物和铝-铁化合物,这取决于所需要的最终硬度,材料所需的最终硬度是可以选择性的调整的。
优选的是,所述铝-铁-硅合金包含高达20%,更优选的是高达15%的锡。从而,对于使用的滑动轴承的滑动性能和机械性能可以调整。
优选的是,所述铝-铁-硅合金包含高达1%的锶和/或钠;更优选的是,包含0.2%的锶和/或钠,再优选的是0.02-0.05%的锶和/或钠。铁硅化物和铝-铁化合物的沉淀行为可以因此得到改善。特别是在铸造过程中,沉淀物的形状和尺寸可以得到调节。而且,还能得到铁硅化物粒子和铝-铁化合物粒子尽可能均一的分布,这样会使材料具有均一的机械性能。然而当量大生产时,钠的添加会产生更精细的沉淀物(例如,见FOSECO公开的“Schmelzbehandlung von Aluminium und Aluminiumlegierungen mit MTS”)。此外,可以获得的高导热系数大约能接近于纯铝的导热系数,这会使得在混合摩擦条件下有更好的散热。
优选的是,所述钢背优选包含C10或C22钢。在这类材料上轧制(电镀)铝-铁-硅合金的材料价格便宜,易于得到,并且具有良好的机械性能特别是高强度的优点。
所述方法的另一个优选实施例包含下列步骤:
(A) 熔化铝-铁-硅合金材料,
(B) 对步骤(A)得到的材料进行铸造,
(C) 对步骤(B)得到的材料进行加热,
(D) 对步骤(C)得到的材料进行轧制,
(E) 将步骤(D)轧制得到的材料轧制到钢支架上然后形成至少一部分钢背,
(F) 对步骤(E)得到的材料进行加热,
(G) 可选择地:对步骤(F)得到的材料进行塑形。
本发明所述方法的一个优点是,可以通过该方法步骤,轻易地控制生产的材料的后续硬度。如上所述,需要合适的硬度,因此按照这种方法生产的材料能够很好的适应所需。此外,所有的步骤在工业应用中很容易实施,这也就意味着实施该方法所需的成本相对很低。
优选的是,通过连续的铸造过程,步骤(B)中的材料被铸造成绞线。其优点是这样的绞线能够很好地应用于工业生产。
优选的是,步骤(C)在温度大约为450-550℃下加热10-20个小时。这样的优点是通过这个步骤,所得到的的材料的硬度将会显著降低,其能较好的促进后续步骤(D)的轧制。更进一步地,会带来所述材料的均一化。
优选的是,通过步骤(D)的轧制得到的材料厚度约为0.8-1.2mm。得到这种相对较薄的材料的优点是,为下一步骤的使用与电镀(E)处理做充分的准备。
此外,优选的是,步骤(F)在大约180-240℃下加热6到10小时。这样,会使其硬度减小,同时位错的减小也确保了理想的嵌入性。硬度的减小和理想的嵌入性都有利于将所述材料应用于滑动轴承。
优选的是,通过步骤(G)的轧制会产生5-15%的变形。因此而能够实现的是,能够使最终材料的硬度很好地适应实际应用。
本发明的另一目的是如权利要求12所述的滑动轴承。
按照本发明的滑动轴承具有铝-铁-硅合金的滑动表面,它的优点已在权利要求1中提及。
进一步的优选实施例记载在引用权利要求12的权利要求13至15中。
根据本发明,所述铁/硅的比例为2:1到4:1。最终可以形成铁硅化物和铝-铁化合物,这取决于所需要的最终硬度,材料所需的最终硬度是可以选择性的调整的。
优选的是,所述铝-铁-硅合金包含高达15%的锡。从而,对于作为滑动轴承使用时的滑动性能和机械性能可以调整。
优选的是,所述铝-铁-硅合金包含高达0.2%的锶和/或纳,更优选的是0.02-0.05%的锶和/或纳。铁硅化物和铝-铁化合物的沉淀的形成和沉淀行为可以通过锶和/或纳的加入得到改善。特别是沉淀物的形状和尺寸可以得到调整。而且,还能使得铁硅化物粒子和铝-铁化合物粒子尽可能均一的分布,这样会使材料具有均一的机械性能。此外,可以获得高导热系数,其大约能接近于纯铝的导热系数,这会导致混合摩擦条件下更好的散热。
此外,优选的是轴承材料的布氏硬度HBW 1/5/30为40至60,这样的优点在于所述硬度尤其适用于滑动轴承。
说明书附图说明
图1示出了按照本发明的权利要求7完成步骤(F)制造的材料的显微图片。
具体实施方式
附图1示出了按照本发明,在完成步骤(F)后制造的一种材料的显微图片。在这个实施例中,铝合金中加入了1.09%的硅和3.45%的铁。所述材料在一个连续铸造过程中铸造得到。铸造以后迅速固化,得到的所述材料布氏硬度HBW1/5/30为50。
随后,所述材料在大约450-550℃下煅烧16个小时。一个小时以后,所述材料的布氏硬度HBW1/5/30为40,两个小时以后的布氏硬度HBW1/5/30为38,三小时、四小时、五小时以后都会维持在这个硬度。煅烧六小时以后所述材料的布氏硬度HBW1/5/30为35,煅烧七小时以后所述材料的布氏硬度HBW1/5/30为37,煅烧八小时以后所述材料的布氏硬度HBW1/5/30为36,煅烧12小时以后所述材料的布氏硬度HBW1/5/30为35,煅烧16小时以后也就是在完成步骤(B)的加热以后,得到所述材料的布氏硬度HBW1/5/30为36。
随后,之前为8mm厚的材料,轧制到厚度为1.1mm。在轧制过程中,能够得到布氏硬度HBW 1/5/30 的硬度为58,厚度为1.5mm,而之后能够实现厚度至1.1mm,材料布氏硬度HBW 1/5/30为62。为了便于比较,材料还被进一步轧制,使厚度为0.45mm,布氏硬度HBW 1/5/30为63。
相较之下,所述材料的一个样本在450-550℃下进一步煅烧,即使在煅烧20小时以后和煅烧24小时以后能检测到其布氏硬度HBW1/5/30为36。
随后,将已轧制至厚1.1mm的所述材料再轧制(电镀)到钢支架上,在电镀之前,所述钢的初始厚度为2.8mm,铝合金的初始厚度如上所述,为1.1mm。电镀以后,所述钢的厚度在1.1-1.15mm之间,铝合金的厚度在0.38-0.42mm之间。如此,所述钢材料产生50%的变形,所述铝材料产生64%的变形,所以总变形量为62%。在这个电镀过程中,所述材料的布氏硬度达HBW1/5/30达到63。
所述材料在180-240℃下煅烧后,测量得其布氏硬度HBW1/5/30为43。得到的材料的显微切片如图1所示。在铝基体上可以清晰的看到沉淀物(以“DST”指代),它还清楚地表明所述沉淀物的典型直径大约为4μm并在铝基体里形成”岛“状。
最后,所述材料轧制至总层厚为1.33mm,其中所述钢支架1mm厚,所述铝合金的厚度为0.3mm。在这个例子中,材料的总变形量为13%,所述刚组件的变形量也为13%。所述铝合金的变形量为22%。该实施例最后的布氏硬度HBW1/5/30为49。
Claims (15)
1.一种滑动轴承的制造方法,其中,铝-铁-硅合金在钢背上轧制,铁/硅的比例为2:1至4:1。
2.如权利要求1所述的方法,其特征在于:所述铝-铁-硅合金最多包含10%的铁和最多3%的硅。
3.如上述任意一项权利要求所述的方法,其特征在于:所述铝-铁-硅合金最多包含15%的锡。
4.如上述任意一项权利要求所述的方法,其特征在于:所述铝-铁-硅合金最多包含0.2%的锶或纳,优选的是包含0.02-0.05%的锶或钠。
5.如上述任意一项权利要求所述的方法,其特征在于:所述钢背包含C10或C22钢。
6.如上述任意一项权利要求所述的方法,其中所述方法包含以下顺序的步骤:
(A)熔化铝-铁-硅合金材料,
(B)对步骤(A)得到的材料进行铸造,
(C)对步骤(B)得到的材料进行加热,
(D)对步骤(C)得到的材料进行轧制,
(E)将步骤(D)轧制得到的第一层材料轧制到钢支架上,然后形成至少一部分钢背,
(F)对步骤(E)得到的材料进行加热,
(G)可选择地:对步骤(F)得到的材料进行塑形。
7.如权利要求6所述的方法,其特征在于:步骤(B)所述的铸造是一个连续铸造过程。
8.如权利要求6或7所述的方法,其特征在于:步骤(C)所述的加热在450-550℃下进行10至20个小时。
9.如权利要求6-8任意一项所述的方法,其特征在于:通过步骤(D)的轧制工艺,使得所述材料的厚度为0.8-1.2mm。
10.如权利要求6-9任意一项所述的方法,其特征在于:步骤(F)所述的加热在180-240℃下进行6至10个小时。
11.如权利要求6-10任意一项所述的方法,其特征在于:步骤(G)的变形量为5-15%。
12.一种滑动轴承,其滑动表面具有铝-铁-硅合金,其中,所述铁/硅比例为2:1至4:1。
13.如权利要求12所述的滑动轴承,其特征在于:所述铝-铁-硅合金最多包含20%的锡,优选的是最多包含15%的锡。
14.如权利要求12或13的滑动轴承,其特征在于:所述铝-铁-硅合金最多包含1%的锶和/或钠;优选的是,包含多达0.2%的锶和/或钠,更优选的是0.02-0.05%的锶和/或钠。
15.如权利要求12-14任一项所述的滑动轴承,其特征在于:所述铝-铁-硅合金的布氏硬度HBW 1/5/30为40-60。
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DE102011004133.8 | 2011-02-15 | ||
DE102011004133.8A DE102011004133B4 (de) | 2011-02-15 | 2011-02-15 | Verfahren zur Herstellung eines bleifreien, plattierten Aluminiumgleitlagers |
PCT/EP2011/068863 WO2012110115A1 (de) | 2011-02-15 | 2011-10-27 | Verfahren zur herstellung eines bleifreien, plattierten aluminiumgleitlagers |
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EP (1) | EP2675620B1 (zh) |
JP (1) | JP6026431B2 (zh) |
KR (1) | KR101843607B1 (zh) |
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DE102013218107A1 (de) * | 2013-09-10 | 2015-03-26 | Ks Gleitlager Gmbh | Gleitlagerverbundwerkstoff |
EP2985358B1 (de) * | 2014-08-14 | 2017-05-03 | KS Gleitlager GmbH | Gleitlagerverbundwerkstoff |
DE102015213052A1 (de) * | 2015-07-13 | 2017-01-19 | Federal-Mogul Wiesbaden Gmbh | Gleitlager, Gleitlagerwerkstoff, Verfahren zur Herstellung eines Gleitlagerwerkstoffes und Verwendung eines Gleitlagerwerkstoffes für ein Gleitlager |
GB2602039B (en) * | 2020-12-16 | 2024-04-24 | Mahle Engine Systems Uk Ltd | Method of manufacturing a strip for a bearing |
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CN103402756B (zh) | 2016-04-20 |
JP6026431B2 (ja) | 2016-11-16 |
DE102011004133A1 (de) | 2012-08-16 |
US9193017B2 (en) | 2015-11-24 |
JP2014507612A (ja) | 2014-03-27 |
EP2675620B1 (de) | 2018-05-23 |
WO2012110115A1 (de) | 2012-08-23 |
DE102011004133B4 (de) | 2015-11-19 |
US20130318795A1 (en) | 2013-12-05 |
KR20140023888A (ko) | 2014-02-27 |
EP2675620A1 (de) | 2013-12-25 |
KR101843607B1 (ko) | 2018-05-14 |
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