摘要
分析了Q215凝固时的结晶特性,计算了小方坯连铸机在2.4m/min拉速、不同二冷配水下铸坯的温度场和凝固前沿温度梯度。在弱水冷却时,铸坯坯壳凝固前沿和坯壳的温度梯度比较小,得到细小的柱状晶和小量等轴晶。连铸坯中间裂纹主要与二冷水相关,弱的二冷配水可降低或消除中间裂纹。
The crystal characteristic of Q215 during solidification was analyzed. The Billet temperature field and temperature gradient in the front of solidifying shell were computed in casting speed of 2.4m/min for different secondary water strategy. Temperature gradient at ahead of shell and shell are rather small for soft water cooling, so the thinner columnar crystals and a small amount equiaxed grain can be obtained. Midway crack is severity influenced by the secondary cooling water, i. e. soft secondary cooling water rate can reduce or eliminate midway crack.
出处
《连铸》
2006年第4期6-7,13,共3页
Continuous Casting
