开发了一种高质量钛合金熔模铸造型壳用水基面层浆料制备工艺, 并研究了配料顺序、搅拌转速及粉液比对浆料、型壳性能的影响。结果表明: 当浆料粉液比为5.0~5.5 g·mL-1, 搅拌转速为40~50 r·min-1, 并且按照锆溶胶、添加剂、ZrO2粉的加料顺序配置浆料时, 浆料及型壳的综合性能最为优异, 此时浆料的黏度为30~35 s, 获得的型壳表面粗糙度低于2.0 μm、室温抗弯强度在4.0 MPa左右。

A preparation process for high quality water-based surface slurry for titanium alloy investment casting shell was developed and the effects of ratio of powder to liquid, preparation order, stirring speed on the properties of slurry and shell were studied. The result shows that the best overall performance of slurry and shell, viscosity of slurry in 30-35 s, surface roughness less than 2.0 μm and bending strength around 4.0 MPa, were given when the ratio of powder to liquid was controlled between 5.0 to 5.5 g·mL-1, stirring speed was in 40-50 r·min-1 with the preparation order of zirconium sol, additive, ZrO2 powder.