High strength and high toughness steel wires and method for maki

Details High strength and high toughness steel wires and method for maki High strength and high toughness steel wires and method for maki

1997-09-02

1999-02-23

Yee, Deborah

Metal treatment

Stock

Amorphous, i.e., glassy

148595, C22C 3818, C22C 3800

Patent

active

058739580

ABSTRACT:
A steel wire is composed mainly of fine pearlite and/or coarse pearlite, where the lamellar cementite in the pearlite is amorphous or amorphous-like. Alternatively, the wire may be composed mainly of bainite, where the cementite in the bainite is amorphous or amorphous-like. To manufacture the steel wire, a starting steel product is subjected repeatedly to patenting and cold drawing, and then subjected to final drawing at a true strain of 2.0 or above while cooling. The steel wire is higher in strength and toughness than wire whose lamellar cementite consists of nano crystals. The steel wire does not suffer any delamination when subjected to torsion.

REFERENCES:
patent: 5211772 (1993-05-01), Ashida et al.
patent: 5575866 (1996-11-01), Minamida et al.

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