C - Chemistry – Metallurgy – 21 – D
Patent
C - Chemistry, Metallurgy
21
D
148/48
C21D 8/06 (2006.01) C21D 1/19 (2006.01) C21D 8/08 (2006.01)
Patent
CA 2024149
ABSTRACT OF THE DISCLOSURE A heat-treated steel product has improved mechanical and physical properties, in particular in the dimensional range of steel wire bar and light steel sections. The steel can be used with advantage as a construction steel. The mechanical and technological properties of the steel are improved in such a way that in the case of concrete-reinforcing steels an advantageous intermediate structure for subsequent thermal hardening is achieved. In the case of purely ferritic- perlitic construction steels, a favourable final structure is selected. These structural states are achieved in direct combination with the thermal hardening or simply through the heat treating of the steel in the rolling process. Throughout its cross section the steel possesses heterogeneous structural and strength properties, with only the boundary zone being normalized. In the case of a construction steel, it consists of a non-normalized, ferritic-perlitic core region surrounded by a normalized, ferritic-perlitic boundary zone. On the other hand, in the case of a as a thermally hardened concrete-reinforcing steel, the steel consists of a non-normalized, ferritic-perlitic core region surrounded by a normalized and subsequently tempered boundary zone.
Horicke Bernhard
Schmitt Wolfgang
Tamm Franz
Hennigsdorfer Stahl Engineering Gmbh
Marks & Clerk
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