Ti or TiAl alloy casting and solidification structure refining method thereof

The invention belongs to the field of solidification structure regulation and control, and particularly discloses a Ti or TiAl alloy casting and a solidification structure refining method thereof.The method comprises the steps that alloy raw materials are put into a smelting furnace crucible, the alloy raw materials are smelted under the high-purity argon condition, continuous stirring is conducted in the smelting process, and alloy melt with uniform components is obtained; the alloy is Ti or TiAl alloy; pouring the alloy melt into a horizontal mechanical vibration casting mold, and applying vibration until the melt is completely solidified under the conditions of ensuring the air tightness of a vacuum chamber and relatively small vibration loss, so as to obtain an alloy casting; the amplitude of horizontal mechanical vibration is 1-5 mm, and the vibration frequency is 5-50 Hz. According to the method, columnar crystal-isometric crystal transformation and grain refinement are achieved through ...