Shell for titanium and titanium alloy precision casting and preparation method thereof
A precision casting and titanium alloy technology, which is applied in the field of alloy precision casting, can solve problems such as easy gelation and sensitivity to pH changes
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[0015] Specific embodiments of the present invention will now be described below.
[0016] The mold shell preparation process and steps of the present embodiment are as follows:
[0017] (1) Preparation of coating: Add zirconium diacetate binder to the finely ground barium zirconate powder that has passed through a 325-mesh sieve and continuously stir it with a stirrer to control the viscosity of the coating slurry at about 30s. The weight ratio of the binder is 4:1;
[0018] (2) Preparation of the mold shell: Dip the wax mold into the above-prepared paint, wait for a while, and when the paint is evenly coated on the wax mold, you can sprinkle sand, and evenly scatter the barium zirconate dry powder on the paint and hang it. The process of coating wax mold and sanding is repeated once; then the back layer coating is carried out; the binder used in the back layer coating is ethyl silicate or silica sol, the filler used is mullite powder, and the back layer coating slurry is us...
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