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Method for precision casting of titanium alloy

A technology for precision casting and titanium alloys, applied in the fields of precision casting titanium alloys and casting molding, can solve the problems of low use temperature of high-temperature titanium alloys, complex preparation process, difficult to obtain shapes, etc., and achieves a small degree of reaction, simple preparation process, Small thickness effect

Inactive Publication Date: 2012-03-07
刘群联
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the deficiencies in the prior art, one of the purposes of the present invention is to provide a preparation method for precision casting titanium alloys, which solves the problems in the prior art that the preparation process is complicated and it is difficult to obtain high-temperature titanium alloy parts with complex shapes, and solves the existing The problem of low service temperature of high-temperature titanium alloy prepared by technology

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A method for precision casting Ti60 high-temperature titanium alloy parts, the steps are as follows:

[0024] 1) Preparation of wax molds: use computer to design the three-dimensional forming of high-temperature titanium alloy castings, import the design files into the rapid prototyping machine to manufacture wax molds of parts, prepare the pouring system, and bond the wax molds to the pouring system;

[0025] 2) Coating and hanging formwork: Boron nitride powder with a particle size of 200 mesh and silica sol are prepared in a weight ratio of 3:1, and a wetting agent and a defoamer are added, wherein the wetting agent accounts for 3% by weight of the slurry , the weight percentage of the defoamer in the slurry is 3‰, add boron nitride powder in the stirring state, then add the wetting agent and defoamer in turn, stir for 10 hours, and make a slurry with a flow cup viscosity of 16 seconds ; In this embodiment, the wetting agent is polyoxyethylene alkylphenol ether, and ...

Embodiment 2

[0031] A method for precision casting Ti-1100 high-temperature titanium alloy parts, the steps are as follows:

[0032] 1) Preparation of wax molds: use computer to design the three-dimensional forming of high-temperature titanium alloy castings, import the design files into the rapid prototyping machine to manufacture wax molds of parts, prepare the pouring system, and bond the wax molds to the pouring system;

[0033] 2) Coating and hanging formwork: Boron nitride powder with a particle size of 320 mesh and silica sol are prepared in a weight ratio of 2.5:1, and a wetting agent and a defoaming agent are added, wherein the wetting agent accounts for 3% by weight of the slurry , the weight percentage of the defoamer in the slurry is 3‰, add boron nitride powder in the stirring state, then add the wetting agent and defoamer in turn, stir for 10 hours, and make a slurry with a flow cup viscosity of 13 seconds ; In this embodiment, the wetting agent is polyoxyethylene alkylphenol...

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Abstract

The invention discloses a method for precision casting of a titanium alloy. The method comprises the five steps of: wax mould preparation, mould shell coating, microwave dewaxing, melting and pouring, and hot isostatic pressing. By integrating advanced rapid prototyping wax mould preparation technology, microwave dewaxing technology, and hot isostatic pressing technology, the invention makes fully use of the advantages of the advanced technologies and realizes precision casting of a Ti-Al-Sn-Zr-Mo-Si high-temperature titanium alloy. The method of the invention can prepare parts with complicated shapes, and guarantees the dimensional precision of casting as well as excellent high-temperature titanium alloy performances.

Description

technical field [0001] The invention relates to the field of casting molding, in particular to the field of precision casting titanium alloys. Background technique [0002] Due to the high service temperature, high temperature strength, good oxidation resistance, creep resistance and fatigue resistance of high temperature titanium alloy, it has obvious advantages in the new generation of high temperature structural materials used in aircraft engines and rocket propulsion systems. It has attracted the attention of material workers in the aerospace industry, and has become one of the research directions and development trends of a new generation of high-temperature structural materials. With the further development of the aviation industry, titanium alloys will be used more and more in aircraft. It is mostly used in the manufacture of important parts and aircraft body structures that require high strength and good heat resistance in aero-engines. [0003] The middle casing f...

Claims

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Application Information

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IPC IPC(8): B22C9/04B22D25/02
Inventor 刘群联
Owner 刘群联
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