Method of producing non-grain-oriented electrical sheet

US6582528B1 · kind B1 · utility

Assignee

• ThyssenKrupp Electrical Steel EBG GmbH · DE

Inventors

• Thomas Böhm · Zorneding, DE
• Jürgen Schneider · Kirchzarten, DE
• Karl Telger · Coesfeld, DE
• Carl-Dieter Wuppermann · Krefeld, DE
• Rudolf Kawalla · Bottrop, DE
• Karl Ernst Friedrich · Moers, DE

Key dates

• Filing date: Dec 28, 2001
• Grant date: Jun 24, 2003
• Expiry date: Dec 28, 2021

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C21D8/1272
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

Method for producing non-grain-oriented electric sheet comprising:introducing steel input stock as a heated and prerolled slab into finishing rolls at a temperature of &lE;1100&deg; C. wherein the reheating temperature (TBR) corresponds to a reheating target temperature (TZBR) determined by the formula:TZBR(&deg; C.)=1195&deg; C.+12.716*(GSi+GAl)whereinTZBR(&deg; C.)=target temperature of the reheated slabGSi=Si content in weight %GAl=Al content in weight %hot rolling to a thickness<3.5 mm at a final rolling temperature (TET)&gE;770&deg; C.coiling at a temperature (THT) whereinTHT(&deg; C.)=154&#8722;1.8&agr;t+0.577 TET+111d/d0whereind0=reference thickness of the strip=3 mmd=actual thickness of the strip in mmt=time in seconds between the end of hot rolling and coiling&agr;=0.7/sec. to 1.3/sec. cooling factorpickling and cold rolling to a thickness of 0.2-1 mm.