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US 12,736,924 B2Granted
Exterior member, electronic timepiece, and exterior member manufacturing method
AssigneeCasio Computer Co., Ltd.
InventorMasao Amano
Life of this patent
Estimating the term…
Abstract
An exterior member includes constituent materials different from one another in crystal grain size. The exterior member has a surface segmented into regions formed of the respective constituent materials.
Claims10
An exterior member comprising constituent materials different from one another in crystal grain size,
- wherein the exterior member has a surface segmented into regions formed of the respective constituent materials,
- wherein the regions include a first region and a second region different from one another, and the constituent materials include a first metal material and a second metal material different from one another in transformation temperature, and
- wherein the first region is formed of the first metal material, and the second region is formed of the second metal material.
An exterior member manufacturing method comprising:
- in a first region as viewed from above, forming a columnar structure with a first constituent material, the columnar structure extending in a vertical direction;
- in a second region that is a void portion in the columnar structure as viewed from above, filling the void portion with powder particles of a second constituent material that is different in transformation temperature from the first constituent material;
- binding the powder particles of the second constituent material and adhering the second constituent material to the columnar structure by hot isostatic pressing;
- and
- heating the columnar structure with the void portion filled with the powder particles of the second constituent material at a temperature between the transformation temperature of the first constituent material and the transformation temperature of the second constituent material to grow crystals of the first constituent material and the second constituent material at different crystal growth rates.
2 more elements
Dependencies are inferred from the claim text.