Method for preparing titanium alloy blade by investment casting method

An investment casting, titanium alloy technology, applied in blade support elements, mechanical equipment, engine elements, etc., can solve the problems of short service life, low plasticity and toughness, high possibility of metallurgical defects, and achieve simple process, batch processing, etc. The effect of improved secondary stability and easy control of tissue uniformity

Inactive Publication Date: 2013-12-25
SUZHOU CHENGTENG ELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its composition characteristics are: alloy elements allow a wide range of fluctuations (Al: 5.5%-6.75%), and allowable content of impurities (Fe: 0.3%max, O: 0.2%max, H: 0.015%max); thus bringing Higher potential for metallurgical defects, lower ductility and toughness, and shorter service life

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A method for preparing titanium alloy blades by investment casting, characterized in that: the mass percent content of each component of the alloy includes: Al7.5%, Mo1.5%, V0.55%, Fe0.6%, Si0.35%, Cr0.15%, Nb0.6%, Sn0.8%, In0.06%, Cu0.035%, Ce0.06%, Y0.015%, Mn0.2%, the rest is titanium and unavoidable non-metallic inclusions,

[0021] The preparation method of precision casting titanium alloy blades includes the following steps: preparing alloys according to the above proportions, melting and pouring of alloy materials: melting temperature: 1790°C, pouring temperature: 1710°C; finally demolding, and heat treatment of the obtained blades: firstly, the blades Heating to 720°C for quenching, and then undergoing three aging treatments. The first aging treatment is at a controlled temperature of 460°C, kept for 2.5 hours, stirred and cooled by an argon fan under vacuum conditions, and the second aging treatment is in an air box furnace. The control temperature is 410°C, h...

Embodiment 2

[0024] A method for preparing titanium alloy blades by investment casting, characterized in that: the mass percent content of each component of the alloy includes: Al7.2%, Mo1.2%, V0.52%, Fe0.52%, Si0.32%, Cr0.12%, Nb0.52%, Sn0.72%, In0.052%, Cu0.032%, Ce0.052%, Y0.012%, Mn0.12%, the rest is titanium and unavoidable non-metallic inclusions,

[0025] The preparation method of precision casting titanium alloy blades includes the following steps: preparing alloys according to the above proportions, melting and pouring of alloy materials: melting temperature: 1780°C, pouring temperature is 1700°C; finally demolding, and heat treatment of the obtained blades: firstly, the blades Heating to 700°C for quenching, and then undergoing three aging treatments, the first aging treatment is at a controlled temperature of 460°C, kept for 2.5 hours, stirred and cooled by an argon fan under vacuum conditions, the second aging treatment is in an air box furnace, The control temperature is 410°...

Embodiment 3

[0028] A method for preparing titanium alloy blades by investment casting, characterized in that: the mass percent content of each component of the alloy includes: Al7.8%, Mo1.8%, V0.58%, Fe0.58%, Si0.38%, Cr0.18%, Nb0.58%, Sn0.78%, In0.058%, Cu0.038%, Ce0.058%, Y0.018%, Mn0.18%, the balance is titanium and Inevitable non-metallic inclusions,

[0029] The preparation method of precision casting titanium alloy blades includes the following steps: preparing alloys according to the above proportions, melting and pouring of alloy materials: melting temperature: 1800°C, pouring temperature: 1730°C; finally demoulding, and heat treatment of the obtained blades: firstly, the blades Heating to 740°C for quenching, and then undergoing three aging treatments, the first aging treatment is at a controlled temperature of 460°C, heat preservation for 3 hours, stirring and cooling with an argon fan under vacuum conditions, the second aging treatment is in an air box furnace, controlled The te...

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Abstract

The invention discloses a method for preparing a titanium alloy blade by an investment casting method. The method is characterized in that the alloy comprises the following components in percent by weight: 7-8% of Al, 1-2% of Mo, 0.5-0.6% of V, 0.5-0.7% of Fe, 0.3-0.4% of Si, 0.1-0.2% of Cr, 0.5-0.7% of Nb, 0.7-0.9% of Sn, 0.05-0.07% of In, 0.03-0.04% of Cu, 0.05-0.07% of Ce, 0.01-0.02% of Y, 0.1-0.3% of Mn and the balance of titanium and inevitable non-metal impurities. The strength of a titanium alloy panel reaches over 1200MPa.

Description

technical field [0001] The invention relates to a method for preparing titanium alloy blades by an investment casting method, which belongs to the field of titanium-based alloy manufacturing. Background technique [0002] Ti-6Al-4V is the most widely used and most mature typical (α+β) two-phase titanium alloy. It has been researched and developed by various countries for nearly 40 years, and has its own alloy grade. Its composition characteristics are: alloy elements allow a wide range of fluctuations (Al: 5.5%-6.75%), and the allowable content of impurities is relatively high (Fe: 0.3%max, O: 0.2%max, H: 0.015%max); thus bringing Higher potential for metallurgical defects, lower ductility and toughness, and shorter service life. For this reason, a few developed countries led by the United States and the United Kingdom have developed corresponding low-gap alloys in the past 20 years, such as the United States UNS R56401, ASTM F468, Grade23, AMS4930, Ti-64ELI, the United Kin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C14/00C22C9/04B22D21/06C22F1/18F01D5/28
Inventor 王强
Owner SUZHOU CHENGTENG ELECTRONICS TECH
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