Method for preparing aluminum-titanium alloy impeller

A technology of aluminum-titanium alloy and titanium alloy, which is applied in the field of preparing aluminum-titanium alloy impellers, can solve the problems of short service life, low plasticity and toughness, high possibility of metallurgical defects, etc., and achieve batch stability improvement, simple process, microstructure The effect of easy control of uniformity

Active Publication Date: 2015-07-01
TONGSHAN COUNTY FENGHUA IND & TRADE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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

[0014] 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 7.6%, Ni 0.76%, Co 0.76%, V 0.86%, Cr 0.36%, Sn 0.36%, Fe 0.076%, Cu 0.036%, Pr 0.056%, Ce 0.016%, Mg 0.56%, Mo 0.56%, Si 0.76%, the balance is titanium and unavoidable non-metallic inclusions,

[0015] The preparation method of the precision casting titanium alloy impeller includes the following steps: preparing the alloy according to the above ratio, melting and pouring the alloy material: the melting temperature is 1800°C, and the pouring temperature is 1730°C; after that, demoulding is carried out, and the obtained impeller is subjected to heat treatment: firstly, the impeller is Heating to 750°C for quenching, and then undergoing three aging treatments: the first aging treatment controls the temperature at 460°C, heat preservation for 3 hours, and argon blower is used to stir and cool under vacuum co...

Embodiment 2

[0018] 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 7.8%, Ni 0.78%, Co 0.78%, V 0.88%, Cr 0.38%, Sn 0.38%, Fe 0.078%, Cu 0.038%, Pr 0.058%, Ce 0.018%, Mg 0.58%, Mo 0.58%, Si 0.78%, the balance is titanium and unavoidable non-metallic inclusions,

[0019] The preparation method of the precision casting titanium alloy impeller includes the following steps: preparing the alloy according to the above ratio, melting and pouring the alloy material: the melting temperature is 1800°C, and the pouring temperature is 1730°C; after that, demoulding is carried out, and the obtained impeller is subjected to heat treatment: firstly, the impeller is Heating to 750°C for quenching, and then undergoing three aging treatments: the first aging treatment controls the temperature at 460°C, heat preservation for 3 hours, and argon blower is used to stir and cool under vacuum co...

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Abstract

The invention discloses a method for preparing an Al-Ti alloy impeller. The method is characterized in that the alloy comprises the following components by mass percent: 7% to 8% of Al, 0.7% to 0.8% of Ni, 0.7% to 0.8% of Co, 0.8% to 0.9% of V, 0.3% to 0.4% of Cr, 0.3% to 0.4% of Sn, 0.07% to 0.09% of Fe, 0.03% to 0.04% of Cu, 0.05% to 0.06% of Pr, 0.01% to 0.02% of Ce, 0.5% to 0.6% of Mg, 0.5% to 0.7% of Mo, 0.7% to 0.9% of Si and the balance of Ti and inevitable nonmetallic inclusions. The strength of a Ti alloy board can reach more than 1200MPa.

Description

technical field [0001] The invention relates to a method for preparing an aluminum-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 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. For this reason, a small number of 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, Grade 23, AMS4930, Ti-64ELI, the United Kingdom IMI318ELI, France TA6VE...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C14/00C22F1/18C23C4/10C23C4/06
Inventor 李茜王文娟邢知晔
Owner TONGSHAN COUNTY FENGHUA IND & TRADE
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