Effect of cold rolling on aging of an intercritically annealed Fe-Mn-Si-C steel. [Fe-0. 08C-1. 45Mn-0. 21Si]

Conference · · TMS (The Metallurgical Society) Paper Selection; (USA)

OSTI ID:5443867

Yang, Dezhuang; Matlock, D K; Krauss, G ^[1]

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1. Colorado School of Mines, Golden (USA)

Overaging is used to improve ductility in the continuous annealing of low carbon sheet steels after either subcritical or intercritical annealing. This presentation evaluates the effects of aging on an intercritically annealed Fe-0.08C-1.45Mn-0.21Si steel. The return of discontinuous yielding, and changes in properties and structure were followed as a function of aging time at various temperatures for both normalized and normalized plus cold-rolled starting microstructures. Intercritical annealing was performed at 760 C and was followed by quenching in ice-water baths. A yielding inflection preceded the development of discontinuous yielding and an activation energy of 107 KJ/mode was determined for aging. The intercritically annealed cold-rolled specimens aged more rapidly than did the normalized structures, a result attributed to the finer size and wider spacing of the martensite-austenite islands in the cold-rolled specimens.

• OSTI ID: 5443867
• Report Number(s): CONF-840909-; CODEN: TMPSA
• Journal Information: TMS (The Metallurgical Society) Paper Selection; (USA), Vol. 56; Conference: TMS-AIME fall meeting, Detroit, MI (USA), 16-20 Sep 1984; ISSN 0197-1689
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
STEELS
AGING
ACTIVATION ENERGY
ANNEALING
AUSTENITE
CARBON ADDITIONS
COLD WORKING
DUCTILITY
GRAIN SIZE
IRON BASE ALLOYS
MANGANESE ALLOYS
MARTENSITE
MECHANICAL PROPERTIES
MICROSTRUCTURE
QUENCHING
SILICON ADDITIONS
TEMPERATURE DEPENDENCE
ALLOYS
CRYSTAL STRUCTURE
ENERGY
FABRICATION
HEAT TREATMENTS
IRON ALLOYS
MATERIALS WORKING
SILICON ALLOYS
SIZE
TENSILE PROPERTIES
360101* - Metals & Alloys- Preparation & Fabrication