Seed crystal preparation process for engineering application of growing of single crystal blades via seed crystal method

The invention relates to a seed crystal preparation process for engineering application of growing of single crystal blades via a seed crystal method, belonging to the technical field of high-temperature alloy precision casting. The method comprises the following steps that S1, selection of raw materials: specifically, selecting single-crystal high-temperature alloy; S2, preparation of a seed crystal test bar: S21, performing crystal selection on the single-crystal high-temperature alloy selected in the step S1 to obtain a large-diameter single-crystal test bar, and cutting the large-diameter single-crystal test bar by using the single-crystal test bar to prepare a target oriented seed crystal; S22, combining the target orientated seed crystal in the step S21 with a wax mold test bar, and performing directional solidification to obtain a seed crystal test bar; and S23, carrying out heat treatment on the seed crystal test bar in the step S22, and then carrying out macroscopic corrosion and single crystal integ