Welding gas and plasma welding method
US-9586293-B2 · Mar 7, 2017 · US
Ferritic stainless steel sheet for plasma arc welding and welding method therefor (as amended)
US2017266751A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2017266751-A1 |
| Application number | US-201515329856-A |
| Country | US |
| Kind code | A1 |
| Filing date | May 12, 2015 |
| Priority date | Jul 31, 2014 |
| Publication date | Sep 21, 2017 |
| Grant date | — |
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Abstract
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The ferritic stainless steel sheet contains, in mass %, C: 0.020% or less, Si: 0.6% or less, Mn: 0.5% or less, P: 0.04% or less, S: 0.010% or less, Al: 0.015% or more and 0.20% or less, Cr: 17.0% or more and 24.0% or less, Ni: less than 0.6%, N: 0.020% or less, Ca: 0.0002% or more and 0.0020% or less, and O: 0.0050% or less and further contains one or two selected from Ti: 0.01% or more and 0.45% or less and Nb: 0.01% or more and 0.55% or less, with the balance being Fe and unavoidable impurities. The ferritic stainless steel sheet satisfies (Ti+Nb×48/93)/(C+N)≧8.0 (where Ti, Nb, C, and N represent the contents (% by mass) of these elements, respectively).
First claim
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1 . A ferritic stainless steel sheet for plasma arc welding, comprising, in mass %, C: 0.020% or less, Si: 0.6% or less, Mn: 0.5% or less, P: 0.04% or less, S: 0.010% or less, Al: 0.015% or more and 0.20% or less, Cr: 17.0% or more and 24.0% or less, Ni: less than 0.6%, N: 0.020% or less, Ca: 0.0002% or more and 0.0020% or less, and O: 0.0050% or less, and further comprising one or two selected from Ti: 0.01% or more and 0.45% or less and Nb: 0.01% or more and 0.55% or less, with the balance being Fe and unavoidable impurities, wherein (Ti+Nb×48/93)/(C+N)≧8.0 (1) is satisfied (in formula (1), Ti, Nb, C, and N represent the contents (% by mass) of these elements, respectively). 2 . The ferritic stainless steel sheet for plasma arc welding according to claim 1 , further comprising, in mass %, one or at least two selected from Mo: 0.01% or more and 2.0% or less, Cu: 0.01% or more and 1.0% or less, and Co: 0.01% or more and 0.2% or less. 3 . The ferritic stainless steel sheet for plasma arc welding according to claim 1 , further comprising, in mass %, one or at least two selected from V: 0.01% or more and 0.10% or less, Zr: 0.01% or more and 0.10% or less, and B: 0.0002% or more and 0.0050% or less. 4 . The ferritic stainless steel sheet for plasma arc welding according to claim 1 , wherein the ferritic stainless steel sheet is used for keyhole welding. 5 . A plasma keyhole welding method in which the ferritic stainless steel sheet for plasma arc welding according to claim 1 is used for plasma keyhole welding. 6 . The ferritic stainless steel sheet for plasma arc welding according to claim 2 , further comprising, in mass %, one or at least two selected from V: 0.01% or more and 0.10% or less, Zr: 0.01% or more and 0.10% or less, and B: 0.0002% or more and 0.0050% or less. 7 . The ferritic stainless steel sheet for plasma arc welding according to claim 2 , wherein the ferritic stainless steel sheet is used for keyhole welding. 8 . The ferritic stainless steel sheet for plasma arc welding according to claim 3 , wherein the ferritic stainless steel sheet is used for keyhole welding. 9 . The ferritic stainless steel sheet for plasma arc welding according to claim 6 , wherein the ferritic stainless steel sheet is used for keyhole welding. 10 . A plasma keyhole welding method in which the ferritic stainless steel sheet for plasma arc welding according to claim 2 is used for plasma keyhole welding. 11 . A plasma keyhole welding method in which the ferritic stainless steel sheet for plasma arc welding according to claim 3 is used for plasma keyhole welding. 12 . A plasma keyhole welding method in which the ferritic stainless steel sheet for plasma arc welding according to claim 6 is used for plasma keyhole welding.
Assignees
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Classifications
with niobium or tantalum · CPC title
with molybdenum or tungsten · CPC title
taking account of the properties of the materials to be welded · CPC title
with copper · CPC title
containing N · CPC title
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Frequently asked questions
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- What does patent US2017266751A1 cover?
- The ferritic stainless steel sheet contains, in mass %, C: 0.020% or less, Si: 0.6% or less, Mn: 0.5% or less, P: 0.04% or less, S: 0.010% or less, Al: 0.015% or more and 0.20% or less, Cr: 17.0% or more and 24.0% or less, Ni: less than 0.6%, N: 0.020% or less, Ca: 0.0002% or more and 0.0020% or less, and O: 0.0050% or less and further contains one or two selected from Ti: 0.01% or more and 0.4…
- Who is the assignee on this patent?
- Jfe Steel Corp
- What technology area does this patent fall under?
- Primary CPC classification C22C38/00. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Thu Sep 21 2017 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 2 related publications on this page (citations in our corpus or others sharing the same primary CPC).