Preparation method of oxide ceramic composite shell for precision casting of titanium alloy

A technology of oxide ceramics and precision casting, which is used in casting molding equipment, casting molds, and casting mold components, etc., can solve the problems of poor air permeability of the mold shell, and resolubilization of materials in contact with water, etc., and achieves good concessions. low cost effect

Active Publication Date: 2014-08-27
张勇弢
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented technology allows for precise control over how molten metal poured into an oxygen containing environment during manufacturing processes without causing damage or contaminating any other materials that may be used with it. It also provides improved heat transfer between the inside walls of the vessel body made from this type of refractory material compared to traditional methods like sandwich constructions. Overall, these technical improvements improve the accuracy and productivity of making Titanium alloys accurately casted through conventional techniques such as vacuum induction melting (VIM) and plasma arc fusion welding (PAW).

Problems solved by technology

This patents discusses traditional methods for producing titania ceramics that require expensive machining tools like cutting tools and sandwichers due to their brittleness nature. Existing techniques involve wetting raw tantalum powders beforehand into slabs, followed by drying them afterwards while maintaining its shape. However, this approach results in residual layers on surfaces where there may still remain some unreacted tin compounds. These residues could lead to cracks if exposed to humid environments over time causing damage. Additionally, existing solutions involving complex steps make manufacturing difficult without sacrificially removing any unwanted substances.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] The preparation method of the oxide ceramic composite shell for titanium alloy precision casting provided by the invention comprises the following steps:

[0050] Step 1, put equal mass of paraffin wax and stearic acid in the wax melting tank, mix and keep the heating temperature at 90°C until it dissolves into wax water, then take out the wax water from the wax melting tank and put it into the wax paste mixer and press the mass Add low-temperature wax scraps at a ratio of 1:1.5 and stir to make a wax paste, during which the stirring temperature is 60°C, and then press the prepared wax paste into an aluminum mold through a low-temperature wax press to make a wax mold;

[0051] The second step is to prepare the surface coating, the facing coating, the reinforcement coating, the back coating and the back hardener respectively.

[0052] The specific steps for preparing the top coat are:

[0053] Step 2.11, first prepare the surface layer adhesive:

[0054] Weigh the zirc...

Embodiment 2

[0084] The preparation method of the oxide ceramic composite shell for titanium alloy precision casting provided by the invention comprises the following steps:

[0085] Step 1, put equal mass of paraffin wax and stearic acid in the wax melting tank, mix and keep the heating temperature at 93°C until it dissolves into wax water, then take out the wax water from the wax melting tank and put it into the wax paste mixer and press the mass Add low-temperature wax scraps at a ratio of 1:2 and stir to make a wax paste. The stirring temperature during this period is 63°C, and then press the prepared wax paste into an aluminum mold through a low-temperature wax press to make a wax mold;

[0086] The second step is to prepare the surface coating, the facing coating, the reinforcement coating, the back coating and the back hardener respectively.

[0087] The process of preparing the top coat is as follows:

[0088] Step 2.11, first prepare the surface layer adhesive:

[0089] Weigh the ...

Embodiment 3

[0118] The preparation method of the oxide ceramic composite shell for titanium alloy precision casting provided by the invention comprises the following steps:

[0119] Step 1, put medium-temperature wax material in the wax melting tank and keep the heating temperature at 98°C until it dissolves into wax water, then pour the wax water into the wax storage tank, put the wax storage tank into the incubator to maintain the heat preservation temperature Store at 65°C. When in use, put the wax storage cylinder into a medium temperature wax press machine and press it into the mold to make a wax mold;

[0120] The second step is to prepare the surface coating, the facing coating, the reinforcement coating, the back coating and the back hardener respectively.

[0121] The specific process of preparing the surface coating is as follows:

[0122] Step 2.11, first prepare the surface layer adhesive:

[0123] Weigh the zirconium sol solution and the emulsifier OP respectively according...

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Abstract

The invention discloses a preparation method of an oxide ceramic composite shell for precision casting of titanium alloy. The preparation method comprises the following five steps: pressing a wax mold; respectively preparing a surface layer coating, a surface-layer-approaching layer coating, a reinforcing layer coating, a back layer coating and a back layer hardening agent; sequentially dipping the wax mold into the above solutions, and drying to prepare a shell model; dewaxing the shell model; roasting the shell model, and discharging the shell model from a furnace, so as to obtain the shell. The preparation method disclosed by the invention solves the defects that materials are dissolved in water and the air permeability of the shell is poor in existing preparation and dewaxing processes of a shell. The preparation method disclosed by the invention has the advantages that the preparation cycle of the shell is shortened, the production efficiency is increased, dewaxing equipment is simple and is simple and convenient to operate, the surface of the roasted shell is smooth, phenomena such as peeling, shedding, cracking, powder falling and the like on a surface layer are avoided, and the shell is good in air permeability and deformability, and thus a casted titanium alloy casting has a smooth surface, is pollution-free and is low in roughness.

Description

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Claims

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Application Information

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Owner 张勇弢
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