| 摘要 |
<p>A boron alloying additive for continuous casting of boron steel having the desired hardenability without tundish nozzle blockage. The additive comprises 0.25-3.0 % boron, 2.5-40 % rare earth metals (RE), 6-60 % titanium, and the balance iron. The additive may also contain silicon, calcium, manganese, and zirconium. In the additive the weight ratios of Ti to B and (Ti + RE) to B are 20:1 - 60:1 and 30:1 - 90:1, respectively.</p> |
