# US 2014/0150931 A1 · Method of surface-treating metal component > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0150931 A1 - Document ID: US20140150931A1 - Status: Published application - Kind: A1 - Application number: 14/119,644 - Filed: 2012-06-01 - Published: 2014-06-05 - Earliest claimed: 2011-06-06 - Assignees: NHK Spring Co., Ltd. - Inventors: Tatsuji Tamura - Web page: https://patentgrep.com/patent/US20140150931A1 ## CPC - G11B 23/00: 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)} - C21D 9/0068: {for particular articles not mentioned below} - C23F 3/04: Heavy metals - C21D 1/74: Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material - G11B: INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER (recording measured values in a way that does not require playback through a transducer G01D9/00; recording or playback apparatus using mechanically marked tape, e.g. punched paper tape, or using unit records, e.g. punched or magnetically marked cards G06K; transferring data from one type of record carrier to another G06K1/18; circuits for coupling output of reproducer to radio receiver H04B1/20; gramophone pick-ups or like acoustic electromechanical transducers or circuits therefor H04R) - C21D: MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING (surface treatment of metallic material involving at least one process provided for in class C23 and at least one process covered by this subclass C23F17/00; unidirectional solidification of eutectic materials or unidirectional demixing of eutectoid materials C30B) - C23F: NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE (working metal by laser beams B23K26/00; desurfacing by applying flames B23K7/00; working of metal by electro-erosion B23H; producing decorative effects by removing surface material, e.g. by engraving, by etching, B44C1/22; electrolytic etching or polishing C25F); INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25 ## 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 chamical 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. ## Claims ### Claim 1 A method of surface-treating a metal component, comprising: a polishing step polishing a surface of a metal component formed into a given shape by chemical polishing or electrolytic polishing; and a heat treat pseudo-plating step forming a pseudo-plated layer on the surface through a heat treatment conducted by heating the metal component at a solution treatment temperature or above in a reducing atmosphere after the polishing step. ### Claim 2 (depends on 1) The method of claim 1, wherein the polishing step scrapes the surface of the metal component by 0.5 micrometer or more. ### Claim 3 (depends on 1) 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. ### Claim 4 (depends on 1) The method of claim 1, further comprising: a preprocessing step preprocessing the metal component by barrel polishing before the polishing step. ### Claim 5 (depends on 1) The method of claim 1, wherein the metal component is a component made of stainless steel to be used for a disk drive. ### Claim 6 (depends on 2) 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 Cor above in the reducing atmosphere. ### Claim 7 (depends on 2) The method of claim 2, further comprising: a preprocessing step preprocessing the metal component by barrel polishing before the polishing step. ### Claim 8 (depends on 3) The method of claim 3, further comprising: a preprocessing step preprocessing the metal component by barrel polishing before the polishing step. ### Claim 9 (depends on 6) The method of claim 6, further comprising: a preprocessing step preprocessing the metal component by barrel polishing before the polishing step. ### Claim 10 (depends on 2) The method of claim 2, wherein the metal component is a component made of stainless steel to be used for a disk drive. ### Claim 11 (depends on 3) The method of claim 3, wherein the metal component is a component made of stainless steel to he used for a disk drive. ### Claim 12 (depends on 4) The method of claim 4, wherein the metal component is a component made of stainless steel to he used for a disk drive. ### Claim 13 (depends on 6) The method of claim 6, wherein the metal component is a component made of stainless steel to be used for a disk drive. ### Claim 14 (depends on 7) The method of claim 7, wherein the metal component is a component made of stainless steel to be used for a disk drive. ### Claim 15 (depends on 8) The method of claim 8, wherein the metal component is a component made of stainless steel to be used for a disk drive. ### Claim 16 (depends on 9) The method of claim 9, wherein the metal component is a component made of stainless steel to be used for a disk drive.