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Method for processing metastable beta-type titanium alloy plate

A plate processing method and titanium alloy technology, applied in the field of titanium alloy processing, can solve problems such as difficult cold processing, difficulty in meeting product performance requirements, and poor plasticity of alloys processed at room temperature, to achieve improved performance batch stability, good plasticity, and performance good effect

Inactive Publication Date: 2010-12-08
PANGANG GROUP VANADIUM TITANIUM & RESOURCES +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is mainly due to the poor plasticity of the alloy at room temperature due to improper thermal processing and heat treatment process, which makes it difficult to carry out cold processing and the product performance is difficult to meet the requirements

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0073] Embodiment 1 adopts the method of the present invention to process metastable β-type alloy plate

[0074] (1) Ingot melting

[0075] Select high-quality grade 0 sponge titanium with low impurity content, industrial pure aluminum, industrial pure chromium, Al-V master alloy, and Ti-Sn master alloy. After mixing, electrode pressing and plasma welding. Finally, a 3-ton ingot was melted by three vacuum consumable arc melting methods, and the diameter of the ingot was 750mm. The weight percentage of the composition of the ingot is V: 15.10%, Cr: 2.94%, Sn: 3.09%, Al: 2.94%, Fe: 0.11%, C: 0.03%, N: 0.02%, H: 0.008%, 0: 0.10%, the balance being Ti.

[0076] (2) Ingot opening

[0077] The billet opening temperature was selected as 1150°C, and the billet was opened on a 4,500-ton forging machine. The billet opening was completed in three fires, the first two fires were heated in an electric furnace, and the latter was heated in a natural gas furnace. The ingot is loaded in ...

Embodiment 2

[0084] (1) Ingot melting

[0085] Select high-quality grade 1 sponge titanium with low impurity content, industrial pure aluminum, industrial pure chromium, Al-V alloy, Ti-Sn alloy. After mixing, electrode pressing and plasma welding. Finally, a 3-ton ingot was melted by three vacuum consumable arc melting methods, and the diameter of the ingot was 750mm. The weight percentage of the composition of the ingot is V: 15.30%, Cr: 3.04%, Sn: 3.17%, Al: 3.11%, Fe: 0.17%, C: 0.007%, N: 0.02%, H: 0.010%, 0: 0.13%, the balance being Ti.

[0086] (2) Ingot opening

[0087] The billet opening temperature is selected as 1100°C, and the billet is opened on a 4500-ton forging machine. The billet opening is completed in three times. The first two fires are heated in an electric furnace, and the latter one is heated in a natural gas furnace. The ingot is loaded in a furnace at 800°C and held for 120 minutes, then heated up to 1100°C for 240 minutes and then released for forging. The firs...

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Abstract

The invention relates to a method for processing a metastable beta-type titanium alloy plate and belongs to the technical field of titanium alloy processing. The invention aims to overcome defects in the prior art, provides technology for processing a Ti-15-3 alloy plate and improves the cold working performance of alloy. The method for processing the metastable beta-type titanium alloy plate comprises the following steps of: smelting the titanium alloy plate into an ingot, charging at the temperature of between 800 and 850 DEG C and keeping the temperature for 100 to 150 minutes, raising the temperature to between 1,100 and 1,150 DEG C and keeping the temperature for 240 to 360 minutes, and finishing the first fire by repeatedly upsetting and drawing; drawing unidirectionally until cogging is finished so as to obtain a blank; sawing and rolling the plate blank into a hot-rolled plate blank with the thickness of 4 to 10 mm at the temperature of between 850 and 1,000 DEG C; and cold rolling to obtain a plate with the thickness of 1 to 3 mm after annealing and alkaline and acid washing. By controlling the rolling temperature, the deformation degree and the cooling speed after deformation, the method controls the structure of a forging stock to fully break the forging stock, and effectively suppresses phase precipitation resulting in a brittle alloy. Therefore, the cold working plasticity and cold working performance are improved.

Description

technical field [0001] The invention relates to a method for processing a metastable β-type titanium alloy plate, belonging to the technical field of titanium alloy processing. Background technique [0002] Titanium and titanium alloys are metal materials with excellent performance, which are widely used in aerospace, petrochemical, thermal and atomic power generation, seawater desalination, naval ships, automobiles, sports and leisure, etc. Among them, titanium and titanium alloy plates are important product forms, accounting for more than 80% of the total output. [0003] In general, β-type titanium alloys have high strength and excellent cold workability, but due to the precipitation of intermetallic compounds, the alloy is brittle (such as Ti-13V-11Cr-3Al) or has segregation (such as Ti-11.5Mo-6Zr- 4.5Sn) and other unfavorable factors hinder the application of β-type titanium alloys. In 1981, the American TIMET Company developed the Ti-15-3 alloy, which contains isomor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/18
Inventor 黄德明杨雄飞韦青峰王怀柳张波吴建国白林
Owner PANGANG GROUP VANADIUM TITANIUM & RESOURCES
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