Girth welded joint of steel pipe
US-2024353033-A1 · Oct 24, 2024 · US
High strength special steel
US10487382B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10487382-B2 |
| Application number | US-201615374870-A |
| Country | US |
| Kind code | B2 |
| Filing date | Dec 9, 2016 |
| Priority date | Sep 9, 2016 |
| Publication date | Nov 26, 2019 |
| Grant date | Nov 26, 2019 |
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- Title
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Abstract
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Disclosed herein is a high strength special steel including, by weight %: carbon (C): from about 0.1 to 0.5%; silicon (Si): from about 0.1 to 2.3%; manganese (Mn): from about 0.3 to 1.5%; chromium (Cr): from about 1.1 to 4.0%; molybdenum (Mo): from about 0.3 to 1.5%; nickel (Ni): from about 0.1 to 4.0%; vanadium (V): from about 0.01 to 0.50%; boron (B): from about 0.001 to 0.010%; niobium (Nb): from about 0.05 to 0.50%; and the balance of iron (Fe) and inevitable impurities.
First claim
Opening claim text (preview).
What is claimed is: 1. A high strength special steel comprising, by weight%: carbon (C): from about 0.1 to 0.5%; silicon (Si): from about 0.1 to 2.3%; manganese (Mn): from about 0.3 to 1.5%; chromium (Cr): from about 1.1 to 4.0%; molybdenum (Mo): from about 0.3 to 1.5%; nickel (Ni): from about 0.1 to 4.0%; vanadium (V): from about 0.01 to 0.50%; boron (B): from about 0.001 to 0.010%; niobium (Nb): from about 0.05 to 0.50%; Oxygen (O): from about 0.0002% to 0.003%; Aluminum (Al); from about 0.0004% to 0.003%; and the balance of iron (Fe); and inevitable impurities, wherein the high strength special steel has tensile strength of from about 1563MPa or more and fatigue life of from about 570,000 cycles or more. 2. The high strength special steel of claim 1 , wherein (V,Fe)C, Nb, and/or Cr type composite carbides exist in a microstructure of the steel. 3. The high strength special steel of claim 1 , wherein a (Fe,Cr) 7 C 3 type composite carbide exists in a microstructure of the steel. 4. The high strength special steel of claim 1 , wherein a (Fe,Cr,Mo) 23 C 6 type composite carbide exists in a microstructure of the steel. 5. The high strength special steel of claim 1 , wherein a (Mo,Fe) 3 B 2 type boride exists in a microstructure of the steel. 6. The high strength special steel of claim 1 , wherein a mole fraction of a precipitate existing in a microstructure of the steel is from about 0.009 or more. 7. The high strength special steel of claim 6 , wherein a size of the precipitate existing in the microstructure of the steel is from about 3.5 nm or less.
Assignees
Inventors
Classifications
containing silicon · CPC title
containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60 · CPC title
containing manganese · CPC title
containing aluminium · CPC title
with more than 1.5% by weight of silicon · CPC title
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Frequently asked questions
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- What does patent US10487382B2 cover?
- Disclosed herein is a high strength special steel including, by weight %: carbon (C): from about 0.1 to 0.5%; silicon (Si): from about 0.1 to 2.3%; manganese (Mn): from about 0.3 to 1.5%; chromium (Cr): from about 1.1 to 4.0%; molybdenum (Mo): from about 0.3 to 1.5%; nickel (Ni): from about 0.1 to 4.0%; vanadium (V): from about 0.01 to 0.50%; boron (B): from about 0.001 to 0.010%; niobium (Nb):…
- Who is the assignee on this patent?
- Hyundai Motor Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification C22C38/44. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Nov 26 2019 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). 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).