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

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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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.