Method for producing non-grain oriented magnetic sheet steel
AssigneeThyssen Krupp Stahl AG
InventorsHans Pircher, Rudolf Kawalla, Manfred Espenhahn, Brigitte Hammer, Klaus Peters, Jürgen Schneider, Carl-Dieter Wuppermann
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Abstract
The invention relates to a method to produce non-grain-oriented magnetic steel sheet made of thin-slab or slab casting with low specific total loss and high polarisation and favourable mechanical properties. It is a characteristic of the invention that the steel slabs are hot rolled either directly from the casting heat or after a reheating to T≧900 ° C. and two or more metal forming passes are performed in the two-phase region austenite/ferrite in the course of finishing rolling.
Claims19
A method to produce hot-strip from casting in slabs, thin slabs, or strip made of a steel with (in mass %):
- 0.001 to 0.1% C
- 0.05 to 3.0% Si
- up to 0.85% Al with Si+2 Al≦3.0%
- 0.05 to 2.0% Mn,
- the balance being substantially iron, impurities and alloying additions of P, Sn, N, Ni, Co, Ti, Nb, Zr, V, B, Sb up to a total of 1.5% comprising:
- hot rolling the steel slabs, the thin slabs or the strips either directly from casting heat or after a renew heating to T≧900° C.;
- and
- performing two or more metal forming passes in a two-phase region austenite/ferrite in a course of a finishing rolling step to produce the hot strip.
Dependencies are inferred from the claim text.