Patent · US Expired

Method of producing cold-rolled, high-strength steel strip with good plasticity and isotropic properties

US5906690A · kind A · utility

1Cited by

2References

5Claims

0Family size

Assignee

Fried Krupp AG Hoesch-Krupp · DE

Inventors

Bernhard Engl · Dortmund, DE
Klaus Horn · Dortmund, DE
Günter Stich · Bochum, DE

Key dates

Filing date	Dec 4, 1996
Grant date	May 25, 1999
Priority date	—
Expiry date	Dec 4, 2016

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC21D8/0473
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

A method of producing cold-rolled, high-strength steel strip with good plasticity and isotropic properties out of steel comprising no more than 0.08% carbon, no more than 10% silicon, no more than 1.8% manganese, between 0.010 and 0.10% phosphorus, no more than 0.02% sulfur, no more than 0.08% aluminum and no more than 0.008% nitrogen by weight plus one or more of the elements titanium, vanadium, niobium, and zirconium, the remainder being iron, by hot rolling, cold rolling, and recrystallization annealing; followed by temper rolling. The steel contains either three times as much titanium or six times as much niobium or zirconium as nitrogen.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.