High-strength, easy-to-weld thick-wall flange steel and its heat treatment method and production method
CN118166270BActive Publication Date: 2025-08-29МААНЬШАНЬ АЙРОН ЭНД СТИЛ КО ЛТД
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Patent Information
- Application Number
- CN202410227755.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-29
- Publication Date
- 2025-08-29
- Estimated Expiration
- 2044-02-29
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Figure CN118166270B_ABST
Abstract
The present invention discloses a high-strength, easy-to-weld, thick-walled flange steel, a heat treatment method and a production method thereof. The low-temperature resistant offshore wind power flange steel contains, by weight percentage, the following elements: C 0.17% to 0.27%, Si 0.40% to 0.70%, Mn 1.30% to 1.50%, Cr 0.50% to 0.70%, Ni 0.28% to 0.35%, Mo 0.30% to 0.50%, V 0.035% to 0.075%, Ti 0.004% to 0.006%, Cu 0.030% to 0.050%, Al 0.015%~0.025%, P≤0.015%, S≤0.010%, O≤0.0040%, the rest are Fe and other inevitable impurities. This steel has excellent strength and toughness and weld fatigue performance, and is suitable for manufacturing high-power wind power flanges.
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Citation Information
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