Process for manufacturing a recovery annealed coated steel substrate for packaging applications and a packaging steel product produced thereby
US-9920445-B2 · Mar 20, 2018 · US
Hard composite chromium plating film and sliding member coated with such film
US9850587B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9850587-B2 |
| Application number | US-201414780928-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 26, 2014 |
| Priority date | Mar 29, 2013 |
| Publication date | Dec 26, 2017 |
| Grant date | Dec 26, 2017 |
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- Title
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Abstract
Official abstract text for this publication.
To provide a trivalent chromium plating film, in which the generation of cracks penetrating from the film surface to a substrate interface is suppressed, and a sliding member coated with the trivalent chromium plating film, plating is conducted with a chromium plating bath containing trivalent chromium as a chromium source, with a second phase dispersed in a planar and/or fibrous form, such that the second phase in a planar and/or fibrous form is dispersed in the hard chromium plating film to prevent or deflect the propagation of cracks, and to suppress the increase of the crack width, thereby suppressing the propagation of cracks in the hard chromium plating film.
First claim
Opening claim text (preview).
What is claimed is: 1. A hard composite chromium plating film produced with a chromium plating bath using trivalent chromium as a chromium source, comprising a second phase dispersed in said film; said second phase being planar Al 2 O 3 having an average diameter of 5-50 μm and an aspect ratio of 5-100 and/or fibrous Al 2 O 3 having and an average diameter of 0.5-5 μm and an aspect ratio of 5-100; and an area ratio of said second phase being 3-60% in a cross section perpendicular to a surface of said film. 2. The hard composite chromium plating film according to claim 1 , wherein said second phase consists of said planar Al 2 O 3 . 3. The hard composite chromium plating film according to claim 1 , wherein said second phase consists of said fibrous Al 2 O 3 . 4. The hard composite chromium plating film according to claim 1 , wherein said second phase is a single crystal. 5. The hard composite chromium plating film according to claim 1 , wherein the maximum crack width observed in a cross section perpendicular to a surface of said film is less than 5 μm. 6. The hard composite chromium plating film according to claim 1 , having hardness HV0.05 of 600-1600. 7. A sliding member coated with the hard composite chromium plating film recited in any one of claims 1 , 2 , 3 , 4 , 5 , and 6 .
Assignees
Inventors
Classifications
Use of special materials · CPC title
- C25D3/06Primary
from solutions of trivalent chromium · CPC title
Alloys based on chromium · CPC title
Bearings · CPC title
Details of bearing layers, i.e. the lining · CPC title
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- What does patent US9850587B2 cover?
- To provide a trivalent chromium plating film, in which the generation of cracks penetrating from the film surface to a substrate interface is suppressed, and a sliding member coated with the trivalent chromium plating film, plating is conducted with a chromium plating bath containing trivalent chromium as a chromium source, with a second phase dispersed in a planar and/or fibrous form, such tha…
- Who is the assignee on this patent?
- Kk Riken
- What technology area does this patent fall under?
- Primary CPC classification C25D3/06. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Dec 26 2017 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).