The strength of 35 and 50Mn steel tubes with 73mm OD and 5mm in wall thickness produced by this technology and using this cooler increased more than 200MPa by comparison with as-rolled tubes.

• 最后用此工艺及冷却装置成功地将73×5mm的50Mn、35钢管的强度比热轧态提高了200MPa以上且塑性指标仍保持相当高的水平。