Preparation method of titanium alloy powders
US-12083602-B2 · Sep 10, 2024 · US
Alloy member and method for hardening surface thereof
US2025263826A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2025263826-A1 |
| Application number | US-202519202379-A |
| Country | US |
| Kind code | A1 |
| Filing date | May 8, 2025 |
| Priority date | Jan 3, 2017 |
| Publication date | Aug 21, 2025 |
| Grant date | — |
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Abstract
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The present disclosure relates to a titanium or titanium alloy member and to a surface hardening method for the titanium or titanium alloy member. The titanium or titanium alloy member includes a base material of titanium or titanium alloy, and at a surface of the base material, a hardened layer formed by diffusion of oxygen into the surface.
First claim
Opening claim text (preview).
1 . An alloy member comprising: a base material of titanium or titanium alloy; and at a surface of the base material, a hardened layer formed by diffusion of nitrogen and oxygen into the surface. 2 . The alloy member according to claim 1 , wherein the hardened layer includes (i) a surface transparent oxide layer, and (ii) a diffusion layer disposed internally from the surface transparent oxide layer. 3 . The alloy member according to claim 2 , wherein the diffusion layer is thicker than the surface transparent oxide layer. 4 . The alloy member according to claim 1 , wherein the hardened layer includes, in order inwardly from the surface of the base material, a surface transparent oxide layer, an external diffusion layer, and an internal diffusion layer, the external diffusion layer includes a portion having a hardness greater than or equal to 300 Hv, the portion being disposed internally from the surface transparent oxide layer, and the internal diffusion layer includes a portion having a hardness less than 300 Hv. 5 . The alloy member according to claim 4 , wherein a concentration of oxygen dissolved in solid solution in the external diffusion layer is higher than that in the internal diffusion layer, and the concentration of oxygen dissolved in solid solution in the internal diffusion layer gradually decreases from outside towards inside. 6 . The alloy member according to claim 4 , wherein concentrations of oxygen and nitrogen dissolved in solid solution in the external diffusion layer are higher than those in the internal diffusion layer, and the concentrations of oxygen and nitrogen dissolved in solid solution in the internal diffusion layer gradually decrease from outside towards inside. 7 . The alloy member according to claim 1 , wherein the hardened layer includes, in order inwardly from the surface of the base material, a surface transparent oxide layer, an external diffusion layer, and an internal diffusion layer, and the surface transparent oxide layer is thinner than the external diffusion layer and the internal diffusion layer. 8 . The alloy member according to claim 1 , wherein the hardened layer includes, in order inwardly from the surface of the base material, a surface transparent oxide layer, an external diffusion layer, and an internal diffusion layer, a concentration of oxygen dissolved in solid solution in the external diffusion layer is higher than that in the internal diffusion layer, and the concentration of oxygen dissolved in solid solution in the internal diffusion layer gradually decreases from outside towards inside. 9 . The alloy member according to claim 1 , wherein the titanium or titanium alloy member is applicable to a casing component of a wristwatch or a clock. 10 . The alloy member according to claim 9 , wherein the casing component includes a bezel, a bezel center region, a back cover, or a band.
Assignees
Inventors
Classifications
- C22F1/183Primary
of titanium or alloys based thereon · CPC title
in inert or controlled atmosphere or vacuum (adjusting the composition of the atmosphere C21D1/76) · CPC title
Alloys based on titanium · CPC title
Pretreatment of the material to be coated (C23C8/04 takes precedence) · CPC title
After-treatment · CPC title
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Frequently asked questions
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- What does patent US2025263826A1 cover?
- The present disclosure relates to a titanium or titanium alloy member and to a surface hardening method for the titanium or titanium alloy member. The titanium or titanium alloy member includes a base material of titanium or titanium alloy, and at a surface of the base material, a hardened layer formed by diffusion of oxygen into the surface.
- Who is the assignee on this patent?
- Casio Computer Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification C22F1/183. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Thu Aug 21 2025 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). 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).