Method of producing a cold-rolled strip in one pass

US5759307A · kind A · utility

Assignees

• Keramchemie GmbH · DE
• BWG BERGWERK—UND WALZWERK—MASCHINENBAU GMBH

Inventors

• Heinz Berger · Neukirchen-Vluyn, DE
• Rolf Noe · Mülheim, DE
• Frank Barhold · Quirnbach, DE
• Jorg Neumann · Ransbach-Baumbach, DE
• Andreas Noe · Kerken, DE
• Ralf Waldmann · Rüscheid, DE
• Bodo Block · Rösrath, DE

Key dates

• Filing date: Aug 30, 1996
• Grant date: Jun 2, 1998
• Expiry date: Aug 30, 2016

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B21B3/02
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

A method of producing a cold-rolled strip from a stainless, ferretic or austenitic high-grade steel or a titanium alloy, wherein the strip which has been wound into a coil and has been manufactured by a hot-rolling or casting process is subjected in one pass to the steps of unwinding the coil, mechanically descaling the strip if required, subsequently chemically and/or electrochemically first or black pickling of the strip, then cold-rolling the strip to finished dimensions, degreasing the strip as required, annealing the strip, finish-pickling the strip and, if necessary, passivating, dressing and stretcher-leveling the strip. The pickling step is carried out in a pickling solution which contains hydrochloric acid, sulfuric acid and/or nitric acid.