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Manufacturing method for precisely cast titanium alloy impeller

A technology of precision casting and titanium alloy, which is applied in the direction of metal material coating process, coating, molten spraying, etc., can solve the problems of short service life, low plasticity and toughness, high possibility of metallurgical defects, etc., and achieve simple process, The effect of improved batch stability and easy control of tissue uniformity

Inactive Publication Date: 2014-01-15
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] Provided is a preparation method of precision casting titanium alloy impeller, characterized in that: the mass percent content of each component of the alloy includes: Al 4.5%, Ni 0.75%, Nb 0.55%, V 0.6%, Cr 0.35%, Si 0.15%, In 0.08%, Cu 0.035%, Pr 0.035%, Y 0.015%, Mn 0.78%, Mo 0.6, Sn 0.6%, the balance is titanium and unavoidable non-metallic inclusions,

[0021] The preparation method of the precision casting titanium alloy impeller: including the following steps: preparing the alloy according to the above ratio, melting and pouring the alloy material: melting temperature: 1780-1800°C, pouring temperature: 1730-1700°C; finally demolding, and heat treatment of the obtained impeller : First, the impeller is heated to 720°C for quenching, and then undergoes three aging treatments. The first aging treatment is at a controlled temperature of 460°C, kept for 2.5-3 hours, stirred and cooled by an argon fan under vacuum conditions, and the second aging treatment is at Air bo...

Embodiment 2

[0024] Provided is a method for preparing a precision cast titanium alloy impeller, characterized in that: the mass percent content of each component of the alloy includes: Al 4.2%, Ni 0.72%, Nb 0.52%, V 0.55%, Cr 0.32%, Si 0.12%, In 0.075%, Cu 0.032%, Pr 0.032%, Y 0.012%, Mn 0.72%, Mo 0.55%, Sn 0.75%, the balance is titanium and unavoidable non-metallic inclusions,

[0025] The preparation method of the precision casting titanium alloy impeller: including the following steps: preparing the alloy according to the above ratio, melting and pouring the alloy material: melting temperature: 1780-1800°C, pouring temperature: 1730-1700°C; finally demolding, and heat treatment of the obtained impeller : First, heat the impeller to 710°C for quenching, then undergo three aging treatments, the first aging treatment is at a controlled temperature of 460°C, keep warm for 2.5-3h, and argon blower is used to stir and cool under vacuum conditions, and the second aging treatment is at Air box...

Embodiment 3

[0028]Provided is a method for preparing a precision cast titanium alloy impeller, characterized in that: the mass percent content of each component of the alloy includes: Al 4.4%, Ni 0.74%, Nb 0.54%, V 0.58%, Cr 0.34%, Si 0.14%, In 0.078%, Cu 0.038%, Pr 0.034%, Y 0.014%, Mn 0.75%, Mo 0.65%, Sn 0.85%, the balance is titanium and unavoidable non-metallic inclusions,

[0029] The preparation method of the precision casting titanium alloy impeller: including the following steps: preparing the alloy according to the above ratio, melting and pouring the alloy material: melting temperature: 1780-1800°C, pouring temperature: 1730-1700°C; finally demolding, and heat treatment of the obtained impeller : First, heat the impeller to 740°C for quenching, then undergo three aging treatments, the first aging treatment is at a controlled temperature of 460°C, keep warm for 2.5-3h, and argon blower is used to stir and cool under vacuum conditions, and the second aging treatment is at Air box ...

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Abstract

The invention discloses a manufacturing method for a precisely cast titanium alloy impeller. The manufacturing method is characterized in that alloy comprises the following components in percentage by mass: 4-5% of Al, 0.7-0.8% of Ni, 0.5-0.6% of Nb, 0.5-0.7% of V, 0.3-0.4% of Cr, 0.1-0.2% of Si, 0.07-0.09% of In, 0.03-0.04% of Cu, 0.03-0.04% of Pr, 0.01-0.02% of Y, 0.75-0.8% of Mn, 0.5-0.7% of Mo, 0.7-0.9% of Sn and the balance of titanium and inevitable nonmetal impurities. The strength of a titanium alloy plate is higher than 1200 MPa.

Description

technical field [0001] The invention relates to a preparation method of a precision casting titanium alloy impeller, 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 Kingdom IMI3...

Claims

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Application Information

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IPC IPC(8): C22C14/00C22F1/18C23C4/12C23C4/10C23C4/06
Inventor 王强
Owner SUZHOU CHENGTENG ELECTRONICS TECH
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