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Title: Controlled rolling process for dual phase steels and application to rod, wire, sheet and other shapes

Abstract

An improved, energy efficient, hot rolling method for direct production of cold formable dual-phase steel is provided. The steel is heated to completely austenitize it and then continuously hot rolled and cooled down into the ferrite-austenite two phase region to a temperature which is just below the effective Ar.sub.3 temperature. The hot rolled steel is then rapidly quenched to provide an alloy containing strong, tough lath martensite (fibers) in a ductile soft ferrite matrix. The method is particularly useful for providing rods in which form the alloy is capable of being drawn into high strength wire or the like in a cold drawing operation without any intermediate annealing or patenting, and has excellent strength, ductility and fatigue characteristics.

Inventors:
 [1];  [2];  [3]
  1. Berkeley, CA
  2. Albany, CA
  3. Laramie, WY
Issue Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
OSTI Identifier:
866033
Patent Number(s):
4619714
Assignee:
Regents of University of California (Berkeley, CA)
Patent Classifications (CPCs):
C - CHEMISTRY C21 - METALLURGY OF IRON C21D - MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS
DOE Contract Number:  
AC03-76SF00098
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
controlled; rolling; process; dual; phase; steels; application; rod; wire; sheet; shapes; improved; energy; efficient; hot; method; direct; production; cold; formable; dual-phase; steel; provided; heated; completely; austenitize; continuously; rolled; cooled; ferrite-austenite; region; temperature; below; effective; rapidly; quenched; provide; alloy; containing; strong; tough; lath; martensite; fibers; ductile; soft; ferrite; matrix; particularly; useful; providing; rods; form; capable; drawn; strength; drawing; operation; intermediate; annealing; patenting; excellent; ductility; fatigue; characteristics; rapidly quenched; alloy containing; particularly useful; cold drawing; energy efficient; dual phase; rolling process; phase steel; hot rolling; containing strong; /148/

Citation Formats

Thomas, Gareth, Ahn, Jae-Hwan, and Kim, Nack-Joon. Controlled rolling process for dual phase steels and application to rod, wire, sheet and other shapes. United States: N. p., 1986. Web.
Thomas, Gareth, Ahn, Jae-Hwan, & Kim, Nack-Joon. Controlled rolling process for dual phase steels and application to rod, wire, sheet and other shapes. United States.
Thomas, Gareth, Ahn, Jae-Hwan, and Kim, Nack-Joon. Wed . "Controlled rolling process for dual phase steels and application to rod, wire, sheet and other shapes". United States. https://www.osti.gov/servlets/purl/866033.
@article{osti_866033,
title = {Controlled rolling process for dual phase steels and application to rod, wire, sheet and other shapes},
author = {Thomas, Gareth and Ahn, Jae-Hwan and Kim, Nack-Joon},
abstractNote = {An improved, energy efficient, hot rolling method for direct production of cold formable dual-phase steel is provided. The steel is heated to completely austenitize it and then continuously hot rolled and cooled down into the ferrite-austenite two phase region to a temperature which is just below the effective Ar.sub.3 temperature. The hot rolled steel is then rapidly quenched to provide an alloy containing strong, tough lath martensite (fibers) in a ductile soft ferrite matrix. The method is particularly useful for providing rods in which form the alloy is capable of being drawn into high strength wire or the like in a cold drawing operation without any intermediate annealing or patenting, and has excellent strength, ductility and fatigue characteristics.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1986},
month = {1}
}

Patent:

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