Method for producing microalloyed tubular steel in combined casting-rolling installation and microalloyed tubular steel
US9144839B2 · kind B2 · utility
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5References
21Claims
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Key dates
| Filing date | Sep 10, 2013 |
| Grant date | Sep 29, 2015 |
| Priority date | — |
| Expiry date | Nov 1, 2033 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/12292
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method produces microalloyed tubular steel from a steel melt having a chemical composition of 0.04-0.05% C, 1.3-1.5% Mn, 0.035-0.05% Nb, 0.035-0.06% V, 0.2-0.4% Cr, 0.2-0.3% Si, >0.015% Al and <0.008% N in percent by weight, the remainder consisting of Fe and unavoidable impurities. The method includes roughening an uncut thin slab strand formed from the steel melt to form a rough strip, reheating the rough strip to produce a reheated rough strip, and finish-rolling the descaled rough strip in a first group of rolling stands and in a second group of the rolling stands.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.