A low-cost precision casting method for titanium alloy and titanium-aluminum alloy

A titanium-aluminum alloy and precision casting technology, which is applied in the direction of casting molding equipment, casting molds, casting mold components, etc., can solve problems such as poor internal quality, and achieve the effect of controlling production costs

Inactive Publication Date: 2011-12-28
HARBIN SHITAI NEW MATERIAL TECH & DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to solve the technical problem of poor surface and internal quality of castings in the existing method of using fused alumina and silica sol to reduce the cost of titanium alloy and titanium-aluminum alloy investment precision casting, and provides a titanium alloy and titanium-aluminum alloy low cost investment casting method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0010] Embodiment 1: The low-cost precision casting method of a kind of titanium alloy and titanium-aluminum alloy of the present embodiment is carried out according to the following steps: 1. Prepare binder: weigh 18.77%~99.63% zirconium sol, zirconium sol, 0-80% silica sol, 0.2%-0.4% wetting agent JFC, 0.02%-0.1% n-octanol, 0.1%-0.3% polyvinyl alcohol and 0.05%-0.43% latex, zirconium sol Add the silica sol and silica sol into the container and mix evenly, then add the wetting agent JFC, n-octanol, polyvinyl alcohol and latex in turn under stirring conditions, and then stir for 10min to 30min to obtain the binder; 2. Prepare the surface coating: Weigh 5% to 70% of calcium carbonate powder, 5% to 20% of alumina powder, 2% to 5% of titanium dioxide powder and 5% to 88% of zirconia powder and mix them uniformly to obtain refractory powder material, and then according to the mass ratio of the refractory powder and the binder obtained in step 1, the ratio of 2 to 4:1, the refracto...

specific Embodiment approach 2

[0011] Embodiment 2: This embodiment differs from Embodiment 1 in that the sum of the mass percentages of zirconium sol and silica sol in step 1 is 99.2%. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0012] Specific embodiment three: what this embodiment is different from specific embodiment one or two is the 4 of the surface coating described in step two # The cup viscosity is controlled at 60s~80s. Others are the same as in the first or second embodiment.

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Abstract

The invention relates to a method for precisely casting a titanium alloy and a titanium aluminum alloy with low cost, which relates to a method for precisely casting the titanium alloy and the titanium aluminum alloy, and solves the technical problem that cast pieces have low surface quality and internal quality in the conventional method for lowering the cost of precisely casting the titanium alloy and the titanium aluminum alloy by using electrically-fused alumina and silica sol. The method comprises the following steps of: preparing a surface layer binder from zirconium sol, silica sol, a wetting agent JFC, n-octyl alcohol, polyvinyl alcohol and latex; adding calcium carbonate, alumina, titanium dioxide and zirconia to prepare a surface layer coating; preparing a shell surface layer; preparing a shell back layer by a universal method for precisely casting the titanium alloy; dewaxing and sintering to obtain a shell; and casting the titanium alloy or the titanium aluminum alloy by using the shell so as to obtain a titanium alloy cast piece or a titanium aluminum alloy cast piece. Compared with a precise casting method by purely using a zirconium-based binder and a zirconia fireproof material, the method has the advantage that raw material cost is lowered by 30 to 70 percent and the method can be used for civil titanium alloy cast pieces and titanium aluminum alloy cast pieces for common aviation.

Description

technical field [0001] The invention relates to a precision casting method for titanium alloy and titanium-aluminum alloy. Background technique [0002] As a rare metal, titanium has small specific gravity, high strength, high temperature resistance and corrosion resistance. It is a high-quality corrosion-resistant light structural material, a new type of functional material and an important bioengineering material. It is mainly used in aerospace industry, chemical industry and sectors of the energy industry. For example, titanium alloy, because of its excellent properties such as low density, high strength, high temperature resistance, low temperature resistance, and non-magnetic properties, titanium alloy is the metal of choice for many national economic industries. However, due to the high price, titanium alloys have always been only used in aerospace, navigation, weapons and other industries, and their application in ordinary civilian industries has been greatly restric...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C9/04B22C3/00
Inventor 不公告发明人
Owner HARBIN SHITAI NEW MATERIAL TECH & DEV
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