The invention provides a preparation method of a
zirconium acetate
surface layer shell for
titanium alloy precision
investment casting, which comprises the following steps: S1, taking a
zirconium acetate binder and an anti-redissolution inhibitor, adding an adhesion
promoter and deionized water under a stirring condition, and uniformly stirring to obtain a
surface layer binder; s2, mixing a
surface layer binder with the surface layer
refractory powder, adding a
wetting agent, and uniformly dispersing the materials to obtain a surface layer
coating; s3, performing vacuum negative pressure defoaming on the surface layer
coating; s4, in a vacuum negative pressure state, after the
wax mold is subjected to uniform
slurry soaking in the surface layer
coating and pressure maintaining is conducted for 60-300 s, sand spraying and
drying are conducted on the
wax mold subjected to
slurry soaking, and a surface layer shell is obtained; s5, a dewaxing hole of the surface layer shell is opened, and staged hot steam dewaxing is carried out; s6, the dewaxed surface layer shell is roasted, and a shell is obtained; according to the method, redissolution of the
zirconium gel surface layer can be effectively inhibited, the compactness of the surface layer can be improved, and the conditions of redissolution, peeling, falling and the like of a zirconium gel surface layer shell process in
titanium alloy precision
investment casting can be obviously improved.