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Calcium oxide-based ceramic mold manufacturing method based on 3D (Three Dimensional) printing technology

A calcium oxide ceramic, calcium oxide-based technology, applied in the direction of additive processing, etc., can solve the problems of calcium oxide easy to absorb moisture and hydration, material design or manufacturing process is complicated, and increase the difficulty of calcium oxide-based ceramic casting mold manufacturing, etc., to achieve Solve the difficulty of core removal, promote sintering, and improve the effect of manufacturing yield

Active Publication Date: 2017-08-08
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation of calcium oxide-based ceramic molds is relatively complicated in terms of material design and manufacturing process, and calcium oxide is easy to absorb moisture and hydrate, which also increases the difficulty of manufacturing calcium oxide-based ceramic molds.

Method used

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  • Calcium oxide-based ceramic mold manufacturing method based on 3D (Three Dimensional) printing technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] 1) Select calcium oxide ceramic powders of 40 μm, 20 μm and 5 μm to carry out particle grading according to the mass ratio of 50:35:15 and mix them evenly;

[0034] 2) Carry out the surface organic treatment of the above-mentioned uniformly mixed powder, the specific operation is as follows:

[0035] (1) uniformly mixing the silane coupling agent with absolute ethanol to prepare an organic solution, the mass fraction of the silane coupling agent in the organic solution is 5%, and the mass fraction of absolute ethanol is 95%;

[0036] (2) fully and uniformly mixing the calcium oxide powder after particle grading with the organic solution at a mass ratio of 3:1 to prepare a mixed slurry;

[0037] (3) Put the mixed slurry at room temperature for 3 to 5 hours, then place it in a vacuum oven, and dry the powder completely to obtain calcium oxide ceramic powder with surface organic treatment;

[0038] 3) Add 5% mass fraction of nano-ZrO to the calcium oxide ceramic powder af...

Embodiment 2

[0046] Step 1, the calcium oxide ceramic powders of 40 μm, 20 μm and 5 μm are subjected to particle gradation and surface organic treatment according to the mass ratio of 50:35:15, and the surface organic treatment is to use Kh50 silane coupling agent as the raw material;

[0047] Step 2, uniformly mixing the silane coupling agent and absolute ethanol to prepare an organic solution, the mass fraction of the silane coupling agent in the organic solution is 5%, and the mass fraction of absolute ethanol is 95%;

[0048] Step 3, fully and uniformly mixing the calcium oxide powder that has completed particle grading and the organic solution at a mass ratio of 3:1 to prepare a mixed slurry;

[0049]Step 4, the mixed slurry is left to stand at room temperature for 3 hours, and then placed in a vacuum drying oven, and the surface organically treated calcium oxide ceramic powder is obtained after the powder is completely dried;

[0050] Step five, uniformly mix the organically treated ...

Embodiment 3

[0058] Step 1, the calcium oxide ceramic powders of 40 μm, 20 μm and 5 μm are subjected to particle gradation and surface organic treatment according to the mass ratio of 50:35:15, and the surface organic treatment is to use Kh50 silane coupling agent as the raw material;

[0059] Step 2, uniformly mixing the silane coupling agent and absolute ethanol to prepare an organic solution, the mass fraction of the silane coupling agent in the organic solution is 5%, and the mass fraction of absolute ethanol is 95%;

[0060] Step 3, fully and uniformly mixing the calcium oxide powder that has completed particle grading and the organic solution at a mass ratio of 3:1 to prepare a mixed slurry;

[0061] Step 4, the mixed slurry is left to stand at room temperature for 5 hours, and then placed in a vacuum drying oven, and the surface organically treated calcium oxide ceramic powder is obtained after the powder is completely dried;

[0062] Step 5, uniformly mix the organically treated ca...

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Abstract

The invention a calcium oxide-based ceramic mold manufacturing method based on a 3D (Three Dimensional) printing technology. The method comprises the following steps: after carrying out organic treatment on calcium oxide ceramic powder subjected to grain size gradation, adding a proper amount of an sintering auxiliary agent and enhanced short fibers and uniformly mixing to prepare calcium oxide-based ceramic powder for 3D printing; carrying out the 3D printing by utilizing a photo-cured adhesive and the calcium oxide-based ceramic powder subjected to the organic treatment, so as to form a calcium oxide-based ceramic mold green body; carrying out degreasing, reactive melt infiltration and high-temperature intensified sintering on the calcium oxide-based ceramic mold to finally obtain a high-strength calcium oxide-based ceramic mold; carrying out surface hydration-proof treatment on the prepared ceramic mold. By adopting the method, the hydration resistance of the calcium oxide-based ceramic mold is improved; the calcium oxide-based ceramic mold prepared by the method has a good high-temperature comprehensive performance and can meet casting requirements of an alloy with higher temperature and (B2) metal with active high-temprature chemical properties, and a mold core is easy to remove.

Description

technical field [0001] The invention belongs to the technical field of rapid precision casting, and in particular relates to a method for manufacturing calcium oxide-based ceramic molds based on 3D printing technology. Background technique [0002] At present, there are mainly two types of ceramic molds for near-net shape precision casting widely used at home and abroad: silica-based and alumina-based. The use temperature of silicon oxide-based ceramics is 1520°C to 1560°C. Under the pouring conditions of 1500°C to 1550°C, the yield is high, but when the use temperature is higher than 1550°C, the high-temperature performance is extremely poor, so silicon oxide-based ceramics are not suitable. High-temperature alloy casting conditions at higher temperatures; alumina-based ceramics have the advantages of high refractoriness, good chemical stability, good thermal stability, good creep resistance, no crystal transformation, etc., and its service temperature is greater than 1550 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/80C04B35/057C04B41/85B33Y70/00B33Y80/00B33Y50/00B33Y10/00
CPCC04B35/803C04B35/057C04B41/009C04B41/501C04B41/85B33Y10/00B33Y50/00B33Y70/00B33Y80/00C04B2235/5236C04B2235/3206C04B2235/3225C04B2235/3244C04B41/4556C04B41/4529
Inventor 李涤尘杨强鲁中良夏园林
Owner XI AN JIAOTONG UNIV
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