MX2008001190A - Seamless steel pipe and method for producing same. - Google Patents
Seamless steel pipe and method for producing same.Info
- Publication number
- MX2008001190A MX2008001190A MX2008001190A MX2008001190A MX2008001190A MX 2008001190 A MX2008001190 A MX 2008001190A MX 2008001190 A MX2008001190 A MX 2008001190A MX 2008001190 A MX2008001190 A MX 2008001190A MX 2008001190 A MX2008001190 A MX 2008001190A
- Authority
- MX
- Mexico
- Prior art keywords
- steel pipe
- seamless steel
- disclosed
- producing
- producing same
- Prior art date
Links
- 229910000831 Steel Inorganic materials 0.000 title abstract 10
- 239000010959 steel Substances 0.000 title abstract 10
- 238000004519 manufacturing process Methods 0.000 title abstract 3
- 239000012535 impurity Substances 0.000 abstract 2
- 229910001566 austenite Inorganic materials 0.000 abstract 1
- 229910001563 bainite Inorganic materials 0.000 abstract 1
- 238000001816 cooling Methods 0.000 abstract 1
- 238000005260 corrosion Methods 0.000 abstract 1
- 230000007797 corrosion Effects 0.000 abstract 1
- 229910000734 martensite Inorganic materials 0.000 abstract 1
- 239000000203 mixture Substances 0.000 abstract 1
- 229910001568 polygonal ferrite Inorganic materials 0.000 abstract 1
- 238000010791 quenching Methods 0.000 abstract 1
- 230000000171 quenching effect Effects 0.000 abstract 1
- 238000005496 tempering Methods 0.000 abstract 1
Landscapes
- Heat Treatment Of Articles (AREA)
Abstract
Disclosed is a seamless steel pipe suitable for submarine flowlines which has high strength, stable toughness and excellent corrosion resistance. Also disclosed is a method for producing such a seamless steel pipe. Specifically disclosed is an as-quenched seamless steel pipe consisting of 0.03-0.08% of C, 0.3-2.5% of Mn, 0.001-0.10% of Al, 0.02-1.0% of Cr, 0.02-1.0% of Ni, 0.02-0.8% of Mo, 0.004-0.010% of Ti, 0.002-0.008% of N, 0.0005-0.005% of Ca, 0-0.08% of V, 0-1.0% of Cu and the balance of Fe and impurities. In this seamless steel pipe, not more than 0.25% of Si, not more than 0.05% of P, not more than 0.005% of S, less than 0.005% of Nb and less than 0.0003% of B are contained as impurities. The seamless steel pipe has a structure consisting of not more than 20% by volume of polygonal ferrite, not more than 10% by volume of a mixture of martensite and residual austenite, and the balance of bainite. Also specifically disclosed is a high-strength thick seamless steel pipe which is obtained by tempering such a steel pipe. The amount of B may be 0.0003-0.001%, and the seamless steel pipe may further contain Mg and one or more of REM. A method for producing such a seamless steel pipe is characterized by the cooling rate during the quenching.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005216233A JP4945946B2 (en) | 2005-07-26 | 2005-07-26 | Seamless steel pipe and manufacturing method thereof |
| JP2006014758 | 2006-07-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| MX2008001190A true MX2008001190A (en) | 2008-03-18 |
Family
ID=40328208
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| MX2008001190A MX2008001190A (en) | 2005-07-26 | 2006-07-26 | Seamless steel pipe and method for producing same. |
Country Status (1)
| Country | Link |
|---|---|
| MX (1) | MX2008001190A (en) |
-
2006
- 2006-07-26 MX MX2008001190A patent/MX2008001190A/en active IP Right Grant
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FG | Grant or registration |