Pollution-free and efficient method for refining titanium-aluminum alloy
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A titanium-aluminum alloy, pollution-free technology, applied in the field of pollution-free and efficient refinement of titanium-aluminum alloy, can solve the problems of poor plasticity at room temperature, coarse structure, high brittleness, etc., and achieve the goals of avoiding melt pollution, refining structure and improving performance Effect
Inactive Publication Date: 2015-01-07
HARBIN INST OF TECH
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[0003] The present invention aims to solve the problems of coarse microstructure, serious segregation and defects, very poor plasticity at room temperature, high brittleness, and diff...
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specific Embodiment approach 1
[0030] Specific implementation mode 1: A pollution-free and high-efficiency refining titanium-aluminum alloy method according to this implementation mode, which is realized according to the following steps:
[0031] Step 1. In the vacuum chamber, the material is placed in the bar material layer 13 of the titanium-aluminum alloy melt melting device, and placed in the middle of the coil 9;
[0032] Step 2, connecting the coil 9 with the electrode; wherein, the inner diameter of the coil 9 is The number is 8 turns, and the electrodes are single-phase alternating current;
[0033] Step 3: Fix the ultrasonic generator on the upper positioning device 2 through the connecting rod 3;
[0034] Step 4, contact the T8 steel tool head 8 with the top surface of the formwork 12 through the upper positioning device 2;
[0035] Step 5. Turn on the vacuum pump 17, evacuate the air pressure in the vacuum chamber to below 1Pa, then backfill high-purity argon to 300Pa, repeat the operation 3 t...
specific Embodiment approach 2
[0044] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the ultrasonic generator described in step 4 generates an oscillating electrical signal with a frequency of 20 KHz.
[0045] Other steps and parameters are the same as those in Embodiment 1.
specific Embodiment approach 3
[0046] Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that: the non-polluting and highly efficient titanium-aluminum alloy device described in step 1 is an yttrium oxide formwork.
[0047] Other steps and parameters are the same as those in Embodiment 1 or Embodiment 2.
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Abstract
The invention discloses a pollution-free and efficient method for refining titanium-aluminum alloy, which solves the problems that a traditional titanium-aluminum alloy casted is thick in tissue, very bad in room temperature plasticity and large in brittleness, is difficult to form, and has very serious segregation. The pollution-free and efficient method comprises the steps below: firstly, a material is placed in a bar layer of a titanium-aluminum alloy melt melting device in the middlemost of a coiler; secondly, an induction coil is connected with an electrode; thirdly, a loudspeaker is fixed on an upper locating device through a connecting rod; fourthly, a tool head of an ultrasonic machine is in contact with the top of a formwork through the locating device; fifth, a vacuum pump is started; sixth, the induction coil is applied with power; seventh, when the power is unloaded, an ultrasonic generating device is used for adding an ultrasonic wave for the ultrasonic treatment time for 0-90s; and eighth, the formwork is taken out and crushed to obtain a refined titanium-aluminum rod. The pollution-free and efficient method provided by the invention is applied to the field of ultrasonically refining titanium-aluminum alloy.
Description
technical field [0001] The invention relates to a pollution-free and high-efficiency refining method of titanium-aluminum alloy. Background technique [0002] As far as the traditional metallurgical method is concerned, the structure obtained after casting titanium-aluminum alloy is very coarse, and there are very serious segregation and defects, the plasticity at room temperature is very poor, the brittleness is very large, and it is difficult to form. Alloying, heat treatment, plastic deformation and other methods are necessary to refine the microstructure and improve room temperature plasticity and high temperature strength to meet the needs of material applications. The refinement of titanium-aluminum alloy can be carried out through the solidification process and the solid-state phase transformation refinement, and the refinement of titanium-aluminum alloy during the solidification process is the main refining method. For example, the first and second-generation titani...
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