About this Abstract |
| Meeting |
MS&T26: Materials Science & Technology
|
| Symposium
|
Developments in Plate and Line Pipe Steels
|
| Presentation Title |
Microstructure Control and Toughness of Heavy-Gauge Coiled Plate |
| Author(s) |
Dmitry Tsvetkov, Charles M. Enloe, Peter Nell |
| On-Site Speaker (Planned) |
Dmitry Tsvetkov |
| Abstract Scope |
The production of heavy-gauge, high toughness coiled plate by the compact strip process has historically been limited by both cast slab thickness and thermo-mechanical processing capability of stand-alone tandem finishing. By optimizing the microalloying strategy and the rolling process of an intermediate thickness slab (4.7” - 5.1”), the strength-toughness balance of high strength, low alloy coiled plate is markedly improved for heavy gauges (0.625” - 1.00”). The effect of transfer bar cooling practices on impact toughness is demonstrated, including the dependence on alloy design. The effects of both reduction and thermal schedules with respective microalloying strategies with niobium and titanium are supported by austenite conditioning modeling. Beneficial effects on strength-toughness balance are observed with titanium additions, presumably due to both a reduction in solute nitrogen prior to hot rolling and limitation of post-recrystallization grain growth prior to finish rolling. |