CN109355619A - 一种具有软硬相间类金刚石涂层的活塞环及制备方法 - Google Patents

一种具有软硬相间类金刚石涂层的活塞环及制备方法 Download PDF

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CN109355619A
CN109355619A CN201811120153.4A CN201811120153A CN109355619A CN 109355619 A CN109355619 A CN 109355619A CN 201811120153 A CN201811120153 A CN 201811120153A CN 109355619 A CN109355619 A CN 109355619A
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王星
程伟胜
严满生
张凯峰
章昱
金鹏
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Anqing TP Goetze Piston Ring Co Ltd
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    • C23C14/24Vacuum evaporation
    • C23C14/32Vacuum evaporation by explosion; by evaporation and subsequent ionisation of the vapours, e.g. ion-plating
    • C23C14/325Electric arc evaporation
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02FCYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
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Abstract

本发明提供一种具有软硬相间类金刚石涂层的活塞环及制备方法,包括活塞环基体,所述活塞环基体外圆面设置有氮化钛层,所述氮化钛层外圆面由内至外设置有一组或多组的类金刚石复合涂层,该类金刚石复合涂层包括由内至外设置的软类金刚石涂层和硬类金刚石涂层,利用氮化钛作为类金刚石复合涂层与活塞环基体之间的过渡结构,可以有效的提高类金刚石复合涂层与活塞环基体的结合强度,并且类金刚石复合涂层采用软硬相间的结构,可以降低类金刚石复合涂层的内应力,进而增加后期的使用寿命,同时具有软硬相间类金刚石涂层的活塞环生产工艺简单,可以根据实际需要进行厚度改变,增加活塞环的实用性。

Description

一种具有软硬相间类金刚石涂层的活塞环及制备方法
技术领域
本发明涉及活塞环技术领域,具体涉及一种具有软硬相间类金刚石涂层的活塞环及制备方法。
背景技术
2020年乘用车燃油耗国家标准百公里5L以下,这对发动机厂以及汽车厂提出了高要求,而降低发动机的摩擦功损失是降低汽车的燃油耗的重要手段之一,活塞环工作摩擦功率损失占发动机总摩擦功损失的25%以上,所以降低活塞环的摩擦损失对发动机降低燃油耗贡献大;
在有些专利中也采用了一些方法,在做类金刚涂层过程中掺入W、Si、H等元素降低涂层的内应力,提高一定程度的结合强度,但是添加元素影响了类金刚石的耐磨性、高温稳定性,不是最佳的选择;
为此,我们提出一种含有过渡层的类金刚石涂层活塞环及制备方法。
发明内容
本发明提供一种具有软硬相间类金刚石涂层的活塞环及制备方法,类金刚石复合涂层采用软硬相间的结构,可以降低类金刚石复合涂层的内应力,进而增加后期的使用寿命。
为解决上述技术问题,本发明采用如下技术方案:
一种具有软硬相间类金刚石涂层的活塞环,包括活塞环基体,所述活塞环基体外圆面设置有氮化钛层,所述氮化钛层外圆面由内至外设置有一组或多组的类金刚石复合涂层,该类金刚石复合涂层包括由内至外设置的软类金刚石涂层和硬类金刚石涂层。
进一步的,相邻所述的类金刚石复合涂层由内至外的硬度随厚度递增。
进一步的,每组所述的类金刚石复合涂层中软类金刚石涂层和硬类金刚石涂层的厚度比为1:100~5:100。
进一步的,所述氮化钛层的厚度H1与类金刚石复合涂层的厚度H2存在如下关系:1/50≤H1/H2≤1/10,在不影响类金刚石涂层后期的效果,以及类金刚石、过渡层和活塞环之间的结合力前提下,降低过渡层和类金刚石涂层的厚度,使活塞环适用于更多的环境。
一种具有软硬相间类金刚石涂层活塞环的制备方法,包括如下步骤:
S1:对活塞环基体进行粗糙化处理,并进行脱脂清洗和碳氢清洗处理;
S2:对处理后的活塞环基体装夹、擦拭并装炉;
S3:打开钛靶电源进行氮化钛层沉积;
S4:进行类金刚石复合涂层沉积,步骤如下:
S41:打开圆柱石墨靶电源,进行软类金刚石涂层沉积,软类金刚石涂层的沉积厚度达到3~5nm;
S42:打开平面石墨靶电源,向炉内通入氩气,进行硬类金刚石涂层沉积,硬类金刚石涂层的沉积厚度达到0.3~0.5um;
S5:循环操作步骤S4,使类金刚石复合涂层沉积厚度达到指定厚度。
进一步的,所述类金刚石复合涂层最大厚度为35um。
由以上技术方案可知,本发明具有如下有益效果:利用氮化钛作为类金刚石复合涂层与活塞环基体之间的过渡结构,可以有效的提高类金刚石复合涂层与活塞环基体的结合强度,并且类金刚石复合涂层采用软硬相间的结构,可以降低类金刚石复合涂层的内应力,进而增加后期的使用寿命,同时具有软硬相间类金刚石涂层的活塞环生产工艺简单,可以根据实际需要进行厚度改变,增加活塞环的实用性。
附图说明
图1为本发明整体示意图;
图2为软类金刚石涂层和硬类金刚石涂层示意图;
图3为类金刚石复合涂层硬度示意图。
图中:1、活塞环基体,2、氮化钛层,3、类金刚石复合涂层,4、软类金刚石涂层,5、硬类金刚石涂层。
具体实施方式
下面结合附图对本发明的一种具有软硬相间类金刚石涂层的活塞环及制备方法优选实施方式作详细的说明。
如图1所示,一种具有软硬相间类金刚石涂层的活塞环,包括活塞环基体1,所述活塞环基体1外圆面设置有氮化钛层2,利用氮化钛层2作为活塞环基体1与类金刚石复合涂层3之间的过渡层,增加活塞环基体1与类金刚石复合涂层3之间的结合强度,避免类金刚石复合涂层3后期的剥离,影响活塞环的使用寿命;
如图2和3所示,所述氮化钛层2外圆面由内至外设置有一组或多组的类金刚石复合涂层3,该类金刚石复合涂层3包括由内至外设置的软类金刚石涂层4和硬类金刚石涂层5,且相邻所述的类金刚石复合涂层由内至外的硬度随厚度的增加而增加,软类金刚石涂层4的硬度范围值为1800HV~2200HV,硬类金刚石涂层5的硬度范围值为2300HV~3500HV;
使得最内侧的软类金刚石涂层4与氮化钛层2的硬度相接近,且氮化钛层2的硬度接近于活塞环基体1和软类金刚石涂层4之间,使得类金刚石复合涂层3能够较稳定的设置于氮化钛层2上,进而提高各层之间的结合力;
每组所述的类金刚石复合涂层中软类金刚石涂层和硬类金刚石涂层的厚度比为1:100~5:100,其一层软类金刚石涂层4结合一层硬类金刚石涂层5,可以有效的降低涂层内应力;
其氮化钛层2的厚度H1与类金刚石复合涂层3的厚度H2存在如下关系:1/50≤H1/H2≤1/10,在不影响类金刚石涂层后期的效果,以及类金刚石涂层、过渡层和活塞环基体之间的结合力前提下,降低过渡层和类金刚石涂层的厚度,使活塞环适用于更多的环境。
一种具有软硬相间类金刚石涂层活塞环的制备方法,包括如下步骤:
S1:对活塞环基体进行粗糙化处理,并进行脱脂清洗和碳氢清洗处理,首先对活塞环基体1表面进行粗糙化处理,并进行活塞环基体1表面的清洁,以提高后期氮化钛层2的沉积结合强度;
S2:对处理后的活塞环基体夹装、擦拭并装炉;
S3:打开钛靶电源进行氮化钛层沉积,优选的可以使氮化钛层由内至外的硬度逐渐增加,使得氮化钛层内层的硬度与活塞环基体1的硬度接近,氮化钛层外层的硬度与后期沉积的类金刚石复合涂层3内层硬度接近,进而提高类金刚石复合涂层3与活塞环基体1的结合强度;
S4:类金刚石复合涂层沉积,步骤如下:
S41:打开圆柱石墨靶电源,进行软类金刚石涂层沉积,软类金刚石涂层的沉积厚度达到3~5nm;
S42:打开平面石墨靶电源,并向炉内通入氩气,进行硬类金刚石涂层沉积,硬类金刚石涂层的沉积厚度达到0.3~0.5um;
S5:循环操作S4,使类金刚石复合涂层沉积厚度达到指定厚度。
利用一组或多组类金刚石复合涂层3沉积与氮化钛层表面,进而降低类金刚石复合涂层3的内应力,使得类金刚石复合涂层3的可剥离力度增大,进而提高类金刚石复合涂层3的使用寿命,提高活塞环的耐久性。
同时循环操作S4,使类金刚石复合涂层沉积厚度达到指定厚度,类金刚石复合涂层3最大厚度为35um,可以根据实际需要对类金刚石复合涂层3的厚度进行调整,其生产工艺较为简单,生产的效率较高,可以有效的增加活塞环的实用性。
以上所述实施方式仅仅是对本发明的优选实施方式进行描述,并非对本发明的范围进行限定,在不脱离本发明设计精神的前提下,本领域普通技术人员对本发明的技术方案作出的各种变形和改进,均应落入本发明的权利要求书确定的保护范围内。

Claims (6)

1.一种具有软硬相间类金刚石涂层的活塞环,包括活塞环基体(1),其特征在于:所述活塞环基体(1)外圆面设置有氮化钛层(2),所述氮化钛层(2)外圆面由内至外设置有一组或多组的类金刚石复合涂层(3),该类金刚石复合涂层(3)包括由内至外设置的软类金刚石涂层(4)和硬类金刚石涂层(5)。
2.根据权利要求1所述的一种具有软硬相间类金刚石涂层的活塞环,其特征在于:相邻的所述类金刚石复合涂层(3)硬度由内至外随厚度递增。
3.根据权利要求1所述的一种具有软硬相间类金刚石涂层的活塞环,其特征在于:每组所述的类金刚石复合涂层(3)中软类金刚石涂层(4)和硬类金刚石涂层(5)的厚度比为1:100~5:100。
4.根据权利要求1所述的一种具有软硬相间类金刚石涂层的活塞环,其特征在于:所述氮化钛层(2)的厚度H1与类金刚石复合涂层(3)的厚度H2存在如下关系:1/50≤H1/H2≤1/10。
5.根据权利要求1-4任意一项所述的一种具有软硬相间类金刚石涂层活塞环的制备方法,包括如下步骤:
S1:对活塞环基体进行粗糙化处理,并进行脱脂清洗和碳氢清洗处理;
S2:对处理后的活塞环基体夹装、擦拭并装炉;
S3:打开钛靶电源进行氮化钛层沉积;
S4:进行类金刚石复合涂层沉积,步骤如下:
S41:打开圆柱石墨靶电源,进行软类金刚石涂层沉积,软类金刚石涂层的沉积厚度达到3~5nm;
S42:打开平面石墨靶电源,并向炉内通入氩气,进行硬类金刚石涂层沉积,硬类金刚石涂层的沉积厚度达到0.3~0.5um;
S5:循环操作步骤S4,使类金刚石复合涂层沉积厚度达到指定厚度。
6.根据权利要求5所述的一种具有软硬相间类金刚石涂层活塞环的制备方法,其特征在于:所述类金刚石复合涂层最大厚度为35um。
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CN111037211A (zh) * 2019-10-28 2020-04-21 南京交通职业技术学院 一种软硬相间的金属构件的制备方法
CN114892126A (zh) * 2022-05-10 2022-08-12 西南石油大学 一种用于钻杆接头的类金刚石薄膜耐磨带

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102358940A (zh) * 2011-10-12 2012-02-22 湖北久之洋红外系统有限公司 一种在物件基底上沉积抗腐蚀类金刚石薄膜的方法
CN102705102A (zh) * 2011-03-28 2012-10-03 帝伯爱尔株式会社 活塞环
CN203098072U (zh) * 2012-05-29 2013-07-31 中外合资安庆帝伯格茨活塞环有限公司 一种高耐磨低摩擦功损失活塞环
CN104630708A (zh) * 2015-03-06 2015-05-20 重庆大学 一种类金刚石厚膜及其制备方法及一种工件
CN108411258A (zh) * 2018-05-29 2018-08-17 大连维钛克科技股份有限公司 一种超厚无氢类金刚石薄膜及其制备方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102705102A (zh) * 2011-03-28 2012-10-03 帝伯爱尔株式会社 活塞环
CN102358940A (zh) * 2011-10-12 2012-02-22 湖北久之洋红外系统有限公司 一种在物件基底上沉积抗腐蚀类金刚石薄膜的方法
CN203098072U (zh) * 2012-05-29 2013-07-31 中外合资安庆帝伯格茨活塞环有限公司 一种高耐磨低摩擦功损失活塞环
CN104630708A (zh) * 2015-03-06 2015-05-20 重庆大学 一种类金刚石厚膜及其制备方法及一种工件
CN108411258A (zh) * 2018-05-29 2018-08-17 大连维钛克科技股份有限公司 一种超厚无氢类金刚石薄膜及其制备方法

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111037211A (zh) * 2019-10-28 2020-04-21 南京交通职业技术学院 一种软硬相间的金属构件的制备方法
CN114892126A (zh) * 2022-05-10 2022-08-12 西南石油大学 一种用于钻杆接头的类金刚石薄膜耐磨带

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