Design of low carbon dual-phase steels for high strength wire

Technical Report · Fri Aug 01 04:00:00 EDT 1986

OSTI ID:7156676

Ahn, J H

Alloy design considerations were assessed to develop a dual-phase steel suitable for cold drawing into high strength wire. Effects of metallurgical variables such as martensite particle size, shape, volume fraction and ferrite grain size on controlling the strength-ductility balance were described. The dual-phase steel Fe-2% Si-0.1% C, developed according to design guidelines, was found to be the most promising material for high strength wire application. This steel could be continuously drawn to strength levels found in commercial high carbon pearlitic wires without any intermediate patenting treatments during the drawing process, resulting in reductions of production cost and operation complexity. The attractive properties are attributed to the fine, fibrous and disconnected lath martensite particles in a fine ferrite matrix. This microstructure can be produced by austenitizing and quenching to form 100% martensite, followed by two phase annealing and subsequent quenching or in the as-rolled condition by rolling in the two phase region and quenching after controlled deformation in the austenite region. The quench after two-phase annealing or finish rolling should be as rapid as possible to prevent austenite pool shrinkage or decomposition prior to transformation to martensite.

• Research Organization: California Univ., Berkeley (USA)
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 7156676
• Report Number(s): LBL-22591; ON: DE87006169
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360101* -- Metals & Alloys-- Preparation & Fabrication
ALLOYS
CORRELATIONS
CRYSTAL STRUCTURE
DRAWING
FABRICATION
HEAT TREATMENTS
IRON ALLOYS
IRON BASE ALLOYS
MATERIALS WORKING
MECHANICAL PROPERTIES
MICROSTRUCTURE
PRODUCTION
ROLLING
SILICON ALLOYS
STEELS
TENSILE PROPERTIES
WIRES