Extremely Low Carbon Steel Plate Excellent in Surface Characteristics, Workability, and Formability and a Method of Producing Extremely Low Carbon Cast Slab
a technology extremely low carbon, which is applied in the field of extremely low carbon steel plate, can solve the problems of high mg, difficult to reduce the large amount of alumina-based inclusions formed in extremely low carbon molten steel, and extremely low yield of molten steel. achieve excellent workability and formability, and prevent surface defects.
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Benefits of technology
Problems solved by technology
Method used
Examples
example 1
[0085]300 t of molten steel with a C concentration of 0.0019 mass % was produced by refining at a converter and treatment at a rotary flow type vacuum degassing apparatus.
[0086]To the molten steel, alloys of Cu, Nb, and B were added, without adding Al, to give 0.011 mass % Si, 0.16 mass % Mn, 0.014 mass % Nb, 0.003 mass % B, 0.07 mass % Cu, 0.0016 mass % N, 0.043 mass % dissolved oxygen, and 0.001 mass % or less acid soluble Al.
[0087]This molten steel was cast into a slab of a thickness of 250 mm and a width of 1800 mm by continuous casting. The cast slab was cut into 8500 mm lengths for use as coil units.
[0088]The thus obtained slab was hot rolled and cold rolled by ordinary methods to finally obtain a coil of cold rolled steel plate of 0.7 mm thickness and a width of 1800 mm. The quality was visually examined on an inspection line after cold rolling and the number of surface defects formed per coil was evaluated.
[0089]As a result, no surface defects were formed and no cracking due...
example 2
[0091]300 t of molten steel with a C concentration of 0.003 mass % was produced by refining at a converter and treatment at a rotary flow type vacuum degassing apparatus.
[0092]To the molten steel, alloys of Cu, Nb, B, and Ni were added, without adding Al, to give 0.01 mass % Si, 0.15 mass % Mn, 0.035 mass % Nb, 0.005 mass % B, 1.8 mass % Cu, 0.5 mass % Ni, 0.0025 mass % N, 0.004 mass % Ti, 0.015 mass % dissolved oxygen, and 0.001 mass % acid soluble Al.
[0093]This molten steel was cast to a slab of a thickness of 250 mm and a width of 1800 mm using a continuous casting machine with an in-mold electromagnetic stirring device while electromagnetically stirring the molten metal by an average flow rate of 50 cm / s at the meniscus. The cast slab was cut into 8500 mm lengths for use as coil units.
[0094]The thus obtained slab was hot rolled and cold rolled by ordinary methods to finally obtain a coil of cold rolled steel plate of 0.7 mm thickness and a width of 1800 mm. The quality of the sl...
PUM
| Property | Measurement | Unit |
|---|---|---|
| diameter | aaaaa | aaaaa |
| concentration | aaaaa | aaaaa |
| flow rate | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More