公开(公告)号：WO2016055498A1

公开(公告)日：2016-04-14

申请号：PCT/EP2015/073080

申请日：2015-10-07

Applicant: MAHLE INTERNATIONAL GMBH ,  MAHLE METAL LEVE S/A

Inventor： DA ROCHA MORDENTE, Paulo José ,  DA SILVA, Davi Antonio ,  COSTA, Nuno

IPC: F16J9/14 ,  C23C14/22 ,  F16J9/26 ,  F16J15/12

CPC classification number: C23C14/044 ,  C23C14/22 ,  F16J9/14 ,  F16J9/26 ,  F16J15/12

Abstract: The present invention relates to a piston ring (1) and to a process for deposition of a coating capable of guaranteeing a variable thickness of the coating layer (5) on the external surface (2) of the piston ring (1) such that a region in the vicinity of the ends (31, 32) of a gap (3) of the ring (1) comprises a coating layer (5) that is thicker than the coating layer in the opposite region in the vicinity of the ends (31, 32) of the ring (1) and, furthermore, with a reduction in the thickness of the coating layer (5) of the ends (31, 32) of the gap (3) of the ring (1), thus providing a piston ring (1) with a high level of durability owing to the excellent strength and to the high level of thickness in the region of greatest wear of the ring.

Abstract translation: 本发明涉及一种活塞环（1）和用于沉积涂层的方法，该涂层能够确保活塞环（1）的外表面（2）上的涂层（5）的可变厚度，使得 在环（1）的间隙（3）的端部（31,32）附近的区域包括在端部（31）附近的相对区域中比涂层厚的涂层（5） ，32），此外，随着环（1）的间隙（3）的端部（31,32）的涂层（5）的厚度的减小，从而提供 活塞环（1）由于优异的强度和在环的最大磨损区域的高度的厚度而具有高水平的耐久性。

公开(公告)号：WO2018189255A1

公开(公告)日：2018-10-18

申请号：PCT/EP2018/059318

申请日：2018-04-11

Applicant: MAHLE METAL LEVE S/A ,  MAHLE INTERNATIONAL GMBH

Inventor： AVELAR ARAUJO, Juliano ,  COSTA, Nuno ,  DA ROCHA MORDENTE, Paulo José ,  LIMA SARABANDA, José Valentim

IPC: F16J9/26

Abstract: The present invention relates to a piston ring (1) for internal combustion engines provided with a ferrous alloy base (2) that comprises an annular outer surface (3) on which a coating comprising at least one outer layer (6) is applied deposited on an adhesive layer (5), the outer layer (6) being provided with a variable thickness, in such a way that the thickness of the outer layer (6) gradually increases from 90° and 270° towards 0° and 360° respectively, with the thickness attaining its maximum value in the region of 0° and 350° and slightly decreasing towards 0° and 360° so as to ensure an optimal working condition, minimizing the contact pressure and consequently the accelerated wear in the vicinities of the ends (41, 42) of the ring (1), in addition to preventing and/or impeding the detachment of the outer layer (6) of the coating.

公开(公告)号：WO2013120157A1

公开(公告)日：2013-08-22

申请号：PCT/BR2013/000044

申请日：2013-02-15

Applicant: MAHLE METAL LEVE S.A. ,  MAHLE INTERNATIONAL GMBH

Inventor： AVELAR ARAUJO, Juliano ,  COSTA, Nuno

IPC: C23C28/04 ,  C23C14/06 ,  F16J9/26 ,  F16C33/10

CPC classification number: F16J9/26 ,  C10N2280/00 ,  C23C14/0605 ,  C23C14/0635 ,  C23C14/34 ,  C23C28/04 ,  C23C28/046 ,  C23C28/322 ,  C23C28/341 ,  C23C28/343 ,  C23C28/347 ,  C23C28/42 ,  F16C33/124 ,  F16C2206/04 ,  F16C2223/60

Abstract: The present invention relates to a sliding element for use in internal combustion engines, provided with a ferrous base (10) covered by a protective surface layer (11 ) comprising at least one nitride applied by physical vapour deposition process (PVD) or a nitrided layer, to which peripheral sliding sur-face a diamond like carbon (DLC) coating (12) is applied, wherein: (i) the coating (12) comprises at least one transition layer (122) comprising WC1-X and a layer (121) of metallic chromium with crystaline structure (BCC - body cubic center) positioned between the ferrous base (10) and an outer amorphous carbon layer (124), and a nanocrystalline phase of carbides, in a multilayer structure of (a-C:H:W) and (a-C:H) in the form of an intermediate layer (123); and (ii) the ratio between the thickness of the outer amorphous carbon layer (124) and the layer (123) composed of a nanocrystalline carbide structure is greater than 4 and/or the thickness ratio of the total layer by the thickness of the outer layer (a-C:H) (124) is greater than 1, preferably between 1 and 1.4.

Abstract translation: 本发明涉及一种用于内燃机的滑动元件，该滑动元件设置有被保护表面层（11）覆盖的铁基（10），该保护表面层包括至少一个通过物理气相沉积工艺（PVD）施加的氮化物或氮化层 ，其中：（i）涂层（12）包括至少一个包含WC1-X的过渡层（122）和层（121），其中， ）（aC：H：W）的多层结构中位于铁基（10）和外非晶碳层（124）之间的具有结晶结构的金属铬（BCC-本体立方体中心）和碳化物的纳米晶相 ）和中间层（123）形式的（aC：H）; 和（ii）外部无定形碳层（124）的厚度与由碳化硅结构的纳米结构构成的层（123）之间的比率大于4，和/或总层的厚度比除外层的厚度之外 层（aC：H）（124）大于1，优选在1和1.4之间。