Girth welded joint of steel pipe
US-2024353033-A1 · Oct 24, 2024 · US
High-strength special steel
US10487380B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10487380-B2 |
| Application number | US-201615374789-A |
| Country | US |
| Kind code | B2 |
| Filing date | Dec 9, 2016 |
| Priority date | Aug 17, 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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Abstract
Official abstract text for this publication.
Disclosed herein is high-strength special steel containing about 0.1 to 0.5 wt % of carbon (C), about 0.1 to 2.3 wt % of silicon (Si), about 0.3 to 1.5 wt % of manganese (Mn), about 1.1 to 4.0 wt % of chromium (Cr), about 0.3 to 1.5 wt % of molybdenum (Mo), about 0.1 to 4.0 wt % of nickel (Ni), about 0.01 to 0.50 wt % of vanadium (V), about 0.05 to 0.50 wt % of titanium (Ti), and the remainder of iron (Fe) and other inevitable impurities.
First claim
Opening claim text (preview).
What is claimed is: 1. A high-strength special steel, comprising about 0.1 to about 0.5 wt % of carbon (C), about 0.1 to about 2.3 wt % of silicon (Si), about 0.3 to about 1.5 wt % of manganese (Mn), about 1.1 to about 4.0 wt % of chromium (Cr), about 0.3 to about 1.5 wt % of molybdenum (Mo), about 0.1 to about 4.0 wt % of nickel (Ni), about 0.01 to about 0.50 wt % of vanadium (V), about 0.05 to about 0.50 wt % of titanium (Ti), about 0.0002 to about 0.003 wt % of oxygen (O), 0.0004 to about 0.003 wt % of aluminum (Al), and a remainder of iron (Fe) and other inevitable impurities; wherein (Ti,V)C complex carbide, (Cr,Fe) 7 C 3 complex carbide, and (Fe,Cr,Mo) 23 C 6 complex carbide form in the microstructure of the steel, and wherein the steel has a tensile strength of about 1541 MPa or more and a fatigue life of about 550 thousand times or more. 2. The high-strength special steel of claim 1 , wherein a precipitate present in the steel structure has a mole fraction of about 0.009 or more. 3. The high-strength special steel of claim 2 , wherein the precipitate present in the steel structure has a size of about 13 nm or less.
Assignees
Inventors
Classifications
- C22C38/44Primary
with molybdenum or tungsten · CPC title
with more than 1.5% by weight of silicon · CPC title
Hardening (C21D1/02 takes precedence); Quenching with or without subsequent tempering (quenching devices C21D1/62) · CPC title
containing manganese · CPC title
with copper · CPC title
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- What does patent US10487380B2 cover?
- Disclosed herein is high-strength special steel containing about 0.1 to 0.5 wt % of carbon (C), about 0.1 to 2.3 wt % of silicon (Si), about 0.3 to 1.5 wt % of manganese (Mn), about 1.1 to 4.0 wt % of chromium (Cr), about 0.3 to 1.5 wt % of molybdenum (Mo), about 0.1 to 4.0 wt % of nickel (Ni), about 0.01 to 0.50 wt % of vanadium (V), about 0.05 to 0.50 wt % of titanium (Ti), and the remainder …
- 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).