Butt welded joint of steel material and method for manufacturing same
US-2021260699-A1 · Aug 26, 2021 · US
Joining structure
US2021121982A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2021121982-A1 |
| Application number | US-202017076839-A |
| Country | US |
| Kind code | A1 |
| Filing date | Oct 22, 2020 |
| Priority date | Oct 23, 2019 |
| Publication date | Apr 29, 2021 |
| Grant date | — |
How to read this patent
A practical reading order for non-experts. Skip the full description unless you need deep technical detail.
- Title
What the patent document calls the invention.
- Abstract
A short plain-language summary of the technical disclosure.
- Assignees and inventors
Who owns or filed the patent and who is credited as inventor.
- Key dates
Filing, priority, publication, and grant dates set the timeline.
- First independent claim
The legal scope of protection — read this for what is actually claimed.
- CPC / IPC classifications
Technology tags used to group this patent with similar filings.
- Citations and related patents
Prior art links and similar publications in this corpus.
Abstract
Official abstract text for this publication.
Provided is a joining structure capable of simplifying the manufacturing process and having high corrosion resistance. A joining structure has a welded part for connecting joined members made of a metal that forms a passive film. An outermost surface portion of the welded part has a pitting potential. The welded part may include a welded part main body formed inside and a surface-modified layer formed in contact with the welded part main body, and the surface-modified layer may include the outermost surface portion having a pitting potential.
First claim
Opening claim text (preview).
What is claimed is: 1 . A joining structure having a welded part for connecting joined members made of a metal that forms a passive film, wherein an outermost surface portion of the welded part has a pitting potential. 2 . The joining structure according to claim 1 , wherein the welded part comprises a welded part main body formed inside, and a surface-modified layer formed in contact with the welded part main body, and the surface-modified layer includes the outermost surface portion having the pitting potential. 3 . The joining structure according to claim 2 , wherein a maximum diameter of the surface-modified layer is equal to or larger than a maximum diameter of the welded part main body as viewed in a cross section in a welding depth direction (Y). 4 . The joining structure according to claim 2 , wherein the surface-modified layer has a plurality of weld beads arranged so that adjacent weld beads overlap with each other. 5 . The joining structure according to claim 2 , wherein the surface-modified layer has a single weld bead. 6 . The joining structure according to claim 2 , wherein as viewed in a cross section in a welding depth direction, a layer thickness of the surface-modified layer is 0.5 μm or greater. 7 . The joining structure according to claim 2 , wherein spinel oxide is not detected by an X-ray absorption fine structure analysis from an outermost surface of the surface-modified layer. 8 . The joining structure according to claim 2 , wherein the welded part is made of a metal or an alloy that forms a passive film. 9 . The joining structure according to claim 2 , wherein the welded part is made of Cr, Cr alloy, Al, Al alloy, Ti, or Ti alloy.
Assignees
Inventors
Classifications
- B23K26/21Primary
by welding · CPC title
Auxiliary equipment · CPC title
taking account of the properties of the material involved · CPC title
of rectilinear seams · CPC title
Stainless steel · CPC title
Patent family
Related publications grouped by family.
External sources
Frequently asked questions
Answers are generated from the same data shown on this page.
- What does patent US2021121982A1 cover?
- Provided is a joining structure capable of simplifying the manufacturing process and having high corrosion resistance. A joining structure has a welded part for connecting joined members made of a metal that forms a passive film. An outermost surface portion of the welded part has a pitting potential. The welded part may include a welded part main body formed inside and a surface-modified layer…
- Who is the assignee on this patent?
- Denso Corp
- What technology area does this patent fall under?
- Primary CPC classification B23K26/21. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Thu Apr 29 2021 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 4 related publications on this page (citations in our corpus or others sharing the same primary CPC).