semikilled steel(【技】脱氧程度介于镇静钢和沸腾钢之间的钢。由于脱氧不完全，浇.注时仍有轻微的沸腾现象，但较沸腾钢弱。半镇静钢具有沸腾钢和镇静钢的一些优点，比镇静钢的中心缩孔小，钢的收得率较高；比沸腾钢的偏析少、力学性能好。其缺点是脱氧程度不易控制，故较少生产。: Semi-killed steels with residual dissolved oxygen in the range 40 to 50 ppm are made by deoxidizing steel in the tap ladle with the addition of a small amount of aluminum together with silicomanganese, or a combination of ferrosilicon and ferromanganese. 剩余溶氧量为(40 〜50) × 10⁻⁶ 的半镇静钢，是通过在出钢钢包中添加少量铝和硅锰合金或者添加硅铁和锰铁对钢水进行脱氧而制得。)
small-corner-radius billet(Longitudinal off-corner subsurface cracks are predicted to form more easily in small-corner-radius billets. 人们预测，偏离角皮下纵裂纹更容易形成于小圆角半径的小方坯中。)
