Welded joint of tempered martensite based heat-resistant steel
US7785426B2 · kind B2 · utility
1Cited by
6References
2Claims
0Family size
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Key dates
| Filing date | Mar 31, 2004 |
| Grant date | Aug 31, 2010 |
| Priority date | — |
| Expiry date | May 31, 2025 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22C38/30
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A welded joint of a tempered martensitic heat resisting steel includes a fine-grained heat affected zone of weldment of a heat resisting steel having a tempered martensite structure which exhibits a creep strength of 90% or more of the creep strength of the base metal thereof. The welded joint is inhibited in the formation of the fine-grained HAZ exhibiting a significantly reduced creep strength.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.