Method for reducing oxygen content in Ti6Al4V alloy by non-consumable arc melting in hydrogen-argon-mixed atmosphere

An electric arc melting, non-consumable technology, applied in the field of material processing, can solve the problems of limiting the utilization rate of titanium alloy waste, and achieve the effect of improving utilization rate, simple process and easy parameters

Inactive Publication Date: 2009-09-09
HARBIN INST OF TECH
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to solve the problem of limiting the utilization rate of titanium alloy waste due to the high oxygen content in titanium alloy waste when recycling titanium alloy, and to provide a method for reducing the consumption of non-consumable arc smelting in a hydrogen-argon mixed atmosphere. Method of Oxygen Content in Ti6Al4V Alloy

Method used

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  • Method for reducing oxygen content in Ti6Al4V alloy by non-consumable arc melting in hydrogen-argon-mixed atmosphere
  • Method for reducing oxygen content in Ti6Al4V alloy by non-consumable arc melting in hydrogen-argon-mixed atmosphere

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specific Embodiment approach 1

[0010] Specific Embodiment 1: In this embodiment, the method for reducing the oxygen content in Ti6Al4V alloy by non-consumable arc melting in a hydrogen-argon mixed atmosphere is realized by the following steps: Put the Ti6Al4V alloy into the melting chamber of a vacuum non-consumable electrode electric arc furnace In a water-cooled copper crucible, first evacuate the melting chamber to 1×10 -2 ~1×10 -4 Pa, then filled with argon with a purity of 99.999% (volume) and hydrogen with a purity of 99.999% (volume), wherein the pressure in the melting chamber is 3 × 10 4 ~10×10 4 Pa, hydrogen accounted for 5% to 30% of the total volume of argon and hydrogen, and then arc smelting for 2 minutes to 20 minutes; that is, the oxygen content in the Ti6Al4V alloy was reduced.

[0011] In this embodiment, after smelting, it is cooled and solidified in a crucible, or cast into castings or ingots.

specific Embodiment approach 2

[0012] Embodiment 2: This embodiment is different from Embodiment 1 in that the current is 150-250A during the smelting process. Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0013] Embodiment 3: This embodiment is different from Embodiment 1 in that the current is 200A during the smelting process. Other steps and parameters are the same as those in Embodiment 1.

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Abstract

The invention relates to a method for reducing oxygen content in a Ti6Al4V alloy by non-consumable arc melting in hydrogen-argon-mixed atmosphere. The invention solves the problem that the utilization rate of a titanium alloy waster material is reduced due to high oxygen content. The inventive method comprises the following steps: putting the Ti6Al4V alloy in a water-cooled copper crucible, vacuumizing and then feeding in argon and hydrogen, and striking-melting for 2min-20min. The inventive method has the advantages of reducing the oxygen content in the alloy and improving the utilization rate of the titanium alloy waster material. As proved by tests, the oxygen content of the Ti6Al4V alloy with initial oxygen content of 0.42%, 1.62% (mass) is reduced to about 0.25% (mass) after the melting by the method by means of regulating the admission amount of the oxygen and the melting time. The invention has simply technologies, easily-set parameters and easy control, and can be applied to massive and continuous production and has realistic meaning.

Description

technical field [0001] The invention relates to a method for reducing the oxygen content in Ti6Al4V alloy, which belongs to the field of material processing. Background technique [0002] Titanium-based alloys have the characteristics of low density, high specific strength, good corrosion resistance and high thermal strength. They are ideal structural materials for aerospace vehicles, petrochemical, food industries and other fields, and are widely used. At present, the production and consumption of titanium alloys are quite large, and a lot of titanium waste is produced. Due to the immature technology of titanium waste recycling, many titanium wastes are transferred to other low-value applications every year. This is because of the impurity elements in titanium alloy waste. In particular, the difficulty of reducing the oxygen content is the main problem restricting the recycling of titanium alloy waste. [0003] At present, the recovery of titanium alloy waste is limited by...

Claims

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Application Information

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IPC IPC(8): C22C1/06C22C14/00
Inventor 苏彦庆骆良顺王亮李新中姜小红郭景杰傅恒志
Owner HARBIN INST OF TECH
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