Effects of alloying elements and hot rolling conditions on the mechanical properties of continuous-annealed extra-low-carbon steel sheet. [Less than 30 ppm carbon]

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

OSTI ID:5441935

Satoh, S; Obara, T; Nishida, M; Irie, T ^[1]

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1. Kawasaki Steel Corporation, Chiba (Japan)

The latest steel making technology facilitates the production of an extra-low-carbon steel with carbon less than 30 ppm. With decreasing carbon content, the amount of alloying elements such as Nb and Ti can be lowered, and the main role of the alloying element changes from only stabilizing carbon and nitrogen to improving planar anisotropy. Moreover precipitation kinetics of carbonitrides becomes sensitive to hot rolling conditions with decreasing alloying element. Based on this understanding, it was confirmed that lowering a slab reheating temperature down to 1000 C improved the tensile properties due to coarsening of precipitates and, therefore, excellent mechanical properties could be obtained even at the finishing temperature far below Ar{sub 3}. Thus the utilization of an extra-low-carbon steel maximizes the advantage of a continuous-annealing process by shortening the heat cycle and reducing hot rolling temperatures.

• OSTI ID: 5441935
• 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
CARBON STEELS
HOT WORKING
MECHANICAL PROPERTIES
CARBON
CHEMICAL COMPOSITION
CORRELATIONS
METALLURGY
NIOBIUM ALLOYS
QUANTITY RATIO
TENSILE PROPERTIES
TITANIUM ALLOYS
ALLOYS
ELEMENTS
FABRICATION
IRON ALLOYS
IRON BASE ALLOYS
MATERIALS WORKING
NONMETALS
STEELS
360103* - Metals & Alloys- Mechanical Properties
360101 - Metals & Alloys- Preparation & Fabrication