工艺参数对冷坩埚连续铸造Ti6Al4V表面的影响

为消除冷坩埚连续成形钛合金铸棒表面缺陷，了解工艺参数对表面质量影响规律，并制备出无裂纹铸棒，通过正交试验和理论分析的方法，研究了不同工艺参数对表面质量的影响，研究表明：表面质量随功率和线圈匝数的增加而变坏，随抽拉速度和拉锭高度的增加先变好后变坏；各参数影响程度不同，线圈匝数影响最大，功率次之，抽拉速度再次，拉锭高度影响最小；铸造表面质量良好钛合金棒的工艺参数为：抽拉速度5mm／min，功率50kW，线圈3匝，拉锭高度30mm。

Effect of technological parameters on the surface quality during cold crucible continuous casting of Ti6Al4V ingots

In order to eliminating surface defects of the ingot continuous cast by cold crucible, finding about the rule of technological parameters effect on surface quality, and obtaining crack free ingot, different parameters are researched in this paper based on orthogonal experiments and theoretical analyzing. The results show that; the surface qualities change bad with the increasing of the power or the turns of the coil; the surface qualities change good firstly, and then change bad with the increasing of withdrawal velocity or the height of the primer. The degrees of parameters affecting the surface qualities are different, the coil is the most important one, the power is the second one, the velocity is the third one and the primer is the last. The parameters for casting good surface quality is obtained: the velocity is 5 mm/min, the power is 50 kW, the coil is 3 turns and the primer is 30 mm in height. A billet with good surface quality can be cast under the mentioned conditions.