So less gas is. given off in the mould than with rimming steel, but enough bubbles form at the top of the ingot to counteract most of the shrinkage.
所以，在钢锭模内析出的气体没有沸腾钢多，但又在钢锭头产形成足够的气泡抵消大部分钢的收缩。
2
The invention provides the ingotmould and the casting method which solve a problem that crackles are produced during a process of casting the round steel ingots.