Method of surface-treating metal component

Patent metadata

Field	Value
Publication number	US-9489978-B2
Application number	US-201214119644-A
Country	US
Kind code	B2
Filing date	Jun 1, 2012
Priority date	Jun 6, 2011
Publication date	Nov 8, 2016
Grant date	Nov 8, 2016

Abstract

Provided is a method for surface-treating a metal component, whereby a pseudo-plated layer can be formed on a surface of a metal component, and quality equivalent to plating or other coating process can be obtained. The method includes a chemical polishing step scraping a surface of a base plate formed into a given shape through chemical polishing by 0.5 micrometer or more, and a heat treat pseudo-plating step forming a pseudo-plated layer on the surface through a heat treatment conducted by heating the base plate at a solution treatment temperature or above, for example, 850 degrees C. or above, preferably approximate 1040 degrees C., in a reducing atmosphere after the polishing step.

First claim

The invention claimed is:

1. A method of surface-treating a Fe—Cr—Ni stainless steel component, comprising:
a polishing step polishing a surface of the Fe—Cr—Ni stainless steel component formed into a given shape by chemical polishing; and
a heat treat pseudo-plating step forming a pseudo-plated layer on the surface through a heat treatment conducted by heating the Fe—Cr—Ni stainless steel component having the surface being in a chemically-polished state at a solution treatment temperature or above in a reducing atmosphere after the polishing step.

2. The method of claim 1 , wherein the polishing step scrapes the surface of the Fe—Cr—Ni stainless steel component by 0.5 micrometer or more.

3. The method of claim 1 , wherein the heat treat pseudo-plating step forms the pseudo-plated layer through a solution treatment conducted by heating at 850 degrees C. or above in the reducing atmosphere.

4. The method of claim 1 , further comprising:
a preprocessing step preprocessing the Fe—Cr—Ni stainless steel component by barrel polishing before the polishing step.

5. The method of claim 1 , wherein the Fe—Cr—Ni stainless steel component is a component of a disk drive.

6. The method of claim 2 , wherein the heat treat pseudo-plating step forms the pseudo-plated layer through a solution treatment conducted by heating at 850 degrees C. or above in the reducing atmosphere.

7. The method of claim 2 , further comprising:
a preprocessing step preprocessing the Fe—Cr—Ni stainless steel component by barrel polishing before the polishing step.

8. The method of claim 3 , further comprising:
a preprocessing step preprocessing the Fe—Cr—Ni stainless steel component by barrel polishing before the polishing step.

9. The method of claim 6 , further comprising:
a preprocessing step preprocessing the Fe—Cr—Ni stainless steel component by barrel polishing before the polishing step.

10. The method of claim 2 , wherein the Fe—Cr—Ni stainless steel component is a component of a disk drive.

11. The method of claim 3 , wherein the Fe—Cr—Ni stainless steel component is a component of a disk drive.

12. The method of claim 4 , wherein the Fe—Cr—Ni stainless steel component is a component of a disk drive.

13. The method of claim 6 , wherein the Fe—Cr—Ni stainless steel component is a component of a disk drive.

14. The method of claim 7 , wherein the Fe—Cr—Ni stainless steel component is a component of a disk drive.

15. The method of claim 8 , wherein the Fe—Cr—Ni stainless steel component is a component of a disk drive.

16. The method of claim 9 , wherein the Fe—Cr—Ni stainless steel component is a component of a disk drive.

17. A method of surface-treating a Fe—Cr—Ni stainless steel component, comprising:
a preprocessing step preprocessing a surface of the Fe—Cr—Ni stainless steel component formed into a given shape by barrel polishing;
a polishing step, after the preprocessing step, polishing the surface of the Fe—Cr—Ni stainless steel component by chemical polishing, to remove fine irregularities that are left on the surface and are hard to be removed by the barrel polishing; and
a heat treat pseudo-plating step forming a pseudo-plated layer on the surface through a heat treatment conducted by heating the Fe—Cr—Ni stainless steel component at a solution treatment temperature or above in a reducing atmosphere after the polishing step.

Assignees

• Tamura Tatsuji
• Nhk Spring Co Ltd

Inventors

• Tamura Tatsuji

Classifications

• C23F3/04 Primary

  Heavy metals · CPC title

• G11B23/00 Primary

  Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus {; Intermediate mediums; Apparatus or processes specially adapted for their manufacture (processes involving a single technical art and for which provision exists elsewhere, see the relevant class, e.g. B29, B41M, B05D, C08L, F16N)} · CPC title

• C21D1/74

  Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material · CPC title

• C21D9/0068

  for particular articles not mentioned below · CPC title