Non-water-based gel injection molding rapid-manufactured calcium oxide-based ceramic casting mold and preparation method thereof
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A technology of calcium oxide ceramics and ceramic casting molds, applied in the direction of additive processing, etc., to achieve the effects of easy removal, convenient storage and use, and good chemical stability
Inactive Publication Date: 2018-05-22
XI AN JIAOTONG UNIV
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[0004] In order to overcome the defect that the above-mentioned prior art exists, the object of the present invention is to provide a kind of non-aqueous gel injection molding method for fast manufacturing of calcium oxide-based ceramic molds, the method adopts the effective method of non-aqueous gel injection molding It solves the hydration problem of calcium oxide-based ceramic molds during the preparation process, and can be used for the preparation of calcium oxide-based ceramic molds with complex internal structures
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Embodiment 1
[0068] A non-water-based gel injection molding method for rapidly manufacturing hollow turbine blade calcium oxide-based ceramic molds, the specific steps are as follows:
[0069] 1. Make casting resin mold
[0070] Using light-curing 3D printing technology to quickly prepare the resin prototype and casting resin mold of the hollow turbine blade; see figure 2 , wherein, 1 is the shell of the hollow turbine blade resin mold, 2 is the pouring port of the resin mold slurry, and 3 is the resin prototype of the hollow turbine blade.
[0071] 2. Prepare the non-water-based premix of the mixed system
[0072] 1) According to the mass ratio of acrylamide: N'N methylenebisacrylamide: tert-butanol = 24:1:100, a tert-butanol premix solution with an organic matter concentration of 20wt% was prepared;
[0073] 2) According to the mass ratio of acrylamide: N'N methylenebisacrylamide: ethylene glycol = 24:1:100, an ethylene glycol premix solution with an organic matter concentration of 20...
Embodiment 2
[0089] A non-water-based gel injection molding method for quickly manufacturing a calcium oxide-based ceramic mold for a turbine engine turbine disc, the specific steps are as follows:
[0090] 1. Make casting molds, use 3D printing technology to quickly prepare polystyrene plastic (PS) prototypes of turbine engine turbine discs and polystyrene plastic (PS) molds for casting; see image 3 , wherein, 4 is the outer ring; 5 is the cold air hole; 6 is the wheel; 7 is the guide vane.
[0091] 2. Prepare the non-water-based premix of the mixed system
[0092] 1) According to the mass ratio of acrylamide: N'N methylenebisacrylamide: tert-butanol = 24:1:100, a tert-butanol premix solution with an organic matter concentration of 20wt% was prepared;
[0093] 2) According to the mass ratio of acrylamide: N'N methylenebisacrylamide: ethylene glycol = 24:1:100, an ethylene glycol premix solution with an organic matter concentration of 20wt% is prepared;
[0094] 3) Mix the above two premi...
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Abstract
The invention discloses a non-water based gel injection molding rapid-manufactured calcium oxide-based ceramic casting mold and a preparation method thereof, and belongs to the technical field of rapid precision casting. The method is characterized in that a mold required for 3D printing technology rapid manufacture is used, and simultaneously a non-water-based gel injection molding technology isapplied, so that the problem of hydration of calcium oxide powder during a casting mold preparation process is effectively solved, and the method can be successfully applied to the preparation of a mold core / mold shell integrated calcium oxide-based ceramic casting mold with complex internal structural parts and components. The manufactured calcium oxide-based ceramic casting mold has good overallperformance, and can meet the casting requirements of ultrahigh-temperature alloys such as a new generation of niobium-silicon-based high-temperature alloy and active light alloys such as titanium-aluminium alloy and magnesium-aluminium alloy, and the core removal performance is extremely excellent, so that the technical problems of difficult removal and high rejection rate of silicon oxide-basedand aluminium oxide-based mold cores are solved, therefore, the non-water based gel injection molding rapid-manufactured calcium oxide-based ceramic casting mold is a huge improvement on an existinginvestment mold precision casting and molding technology, and has broad market prospect and market value.
Description
technical field [0001] The invention belongs to the technical field of rapid precision casting, and in particular relates to a calcium oxide-based ceramic mold for rapid production by non-water-based gel injection molding and a preparation method thereof. Background technique [0002] With the development of high-performance aerospace vehicles, the operating temperature of engine hot-end parts has been continuously increasing, which has gradually exceeded the limit temperature of existing nickel-based and cobalt-based superalloys. New super-high-temperature alloy materials such as niobium-silicon-based alloys are expected to It will become the material of the new generation of turbine blades in the future. However, the melting point of niobium-silicon-based alloys exceeds 1800 ° C, which has exceeded the maximum service temperature of the currently used silica-based and alumina-based ceramic cores and molds. At the same time, aerospace vehicles have higher and higher require...
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