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Method for producing TB6 plate slab by electron beam cold hearth melting

An electron beam cooling hearth furnace and slab technology, which is applied in the production field of titanium alloy TB6 slabs, can solve the problems of large ingot sizes, etc., and achieve the effects of increasing the yield of finished products, increasing the utilization rate, and reducing the amount of capture

Inactive Publication Date: 2015-12-23
YUNNAN TITANIUM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the shortcomings of the above-mentioned prior art, and provide a method that can effectively solve the problems and shortcomings of the traditional method of producing TB6 slabs. The ingots produced have large specifications, high weight, good quality, and fast production speed. , a method for producing TB6 slabs by smelting in an electron beam cold hearth furnace with short process flow and convenient operation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] A method for producing TB6 slab by electron beam cold hearth furnace smelting, comprising the steps:

[0015] (1) Mix the V-Al alloy with a particle size of 6mm to 10mm and Fe chips with a particle size of 6mm to 8mm. After mixing evenly, use a 600T press to apply an axial pressure of 15MPa to press into an electrode block with a size of Φ100mm×length 300mm , and then use furnace welding to weld the electrode block into an electrode with a size of Φ100mm×length 1500mm, and then place the electrode in a vacuum consumable electric arc furnace. When the smelting vacuum degree is less than 5Pa, start smelting. The V-Al-Fe master alloy ingot was smelted once under the condition of a voltage of 30V; the V mass content of the V-Al alloy in this embodiment is 60%, the Al mass content is 40%, and the purity of Fe chips is ≥99.9%;

[0016] (2) breaking the V-Al-Fe master alloy ingot into V-Al-Fe master alloy particles with a particle size of ≤3mm;

[0017] (3) After mixing the V...

Embodiment 2

[0019] A method for producing TB6 slab by electron beam cold hearth furnace smelting, comprising the steps:

[0020] (1) Mix the V-Al alloy with a particle size of 6mm to 10mm and Fe chips with a particle size of 6mm to 8mm. After mixing evenly, use a 600T press to apply an axial pressure of 15MPa to press into an electrode block with a size of Φ100mm×length 300mm , and then use furnace welding to weld the electrode blocks in pairs to form electrodes with a size of Φ100mm×length 1500mm, and then place the electrodes in a vacuum consumable electric arc furnace. When the melting vacuum is 5Pa, start melting, and the melting current is 1800A The V-Al-Fe master alloy ingot was smelted once under the condition that the smelting voltage was 28V; the V mass content of the V-Al alloy in this embodiment was 55%, the Al mass content was 45%, and the purity of Fe chips was ≥99.9%;

[0021] (2) breaking the V-Al-Fe master alloy ingot into V-Al-Fe master alloy particles with a particle siz...

Embodiment 3

[0024] A method for producing TB6 slab by electron beam cold hearth furnace smelting, comprising the steps:

[0025] (1) Mix the V-Al alloy with a particle size of 6mm to 10mm and Fe chips with a particle size of 6mm to 8mm. After mixing evenly, use a 600T press to apply an axial pressure of 15MPa to press into an electrode block with a size of Φ100mm×length 300mm , and then use furnace welding to weld two electrode blocks into electrodes with a size of Φ100mm×length 1500mm, and then place the electrodes in a vacuum consumable electric arc furnace. When the melting vacuum is close to 5Pa, the melting starts, and the melting current is 1300A , The V-Al-Fe master alloy was smelted once under the condition of a smelting voltage of 29V; the V-Al-Fe master alloy was smelted once by a vacuum consumable electric arc furnace, and cast into a V-Al-Fe master alloy ingot. The V mass content of the V-Al alloy in this embodiment is 65%, the Al mass content is 35%, and the purity of Fe scra...

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Abstract

The invention provides a method for producing a TB6 plate slab by electron beam cold hearth melting. The method comprises the following steps: uniformly mixing a V-Al alloy with granularity of 6 to10mm and Fe scraps with the granularity of 6 to8mm; then pressing the mixture into electrode blocks; welding the electrode blocks into electrodes by furnace brazing; then smelting through a vacuum consumable electro-arc furnace to obtain a V-Al-Fe intermediate alloy; crushing the V-Al-Fe intermediate alloy into V-Al-Fe intermediate alloy particles of which the granularity is not greater than 3mm; uniformly mixing the particles with titanium sponge, and then pressing the mixture into blocks; feeding the blocks into a feeder of an electron beam cold hearth, and transferring to a feeding system of the electron beam cold hearth; vacuumizing until the degree of vacuum in the feeder is not greater than 0.2Pa; starting an electronic gun to smelt; then casting; feeding ingots after casting; charging argon to cool to obtain the TB6 plate slab. With the adoption of the method, the problems and shortages of a traditional method of producing the TB6 plate slab can be effectively solved; the produced ingots are large in size, high in weight, and high in quality; the production is fast; the production process is small, and the operation is convenient.

Description

technical field [0001] The invention relates to the technical field of production methods of titanium alloy TB6 slabs. Background technique [0002] Ti-1023 (nominal chemical composition is Ti-10V-2Fe-3Al) titanium alloy is a high-toughness near-β-type titanium alloy successfully developed by Timet Company of the United States in 1971 and widely used so far. It is a forged titanium alloy with high structural efficiency, high reliability and low manufacturing cost to adapt to the principle of damage tolerance design. After proper processing and treatment, it can achieve the best combination of strength, toughness and fatigue resistance. TB6 is a domestically produced titanium alloy developed on the basis of Ti-1023. This alloy has good cold and hot processing properties, is easy to forge, can be rolled and welded, and can obtain higher mechanical properties through solution-aging treatment. Properties, after heat treatment, its tensile strength δ b 965~1310MPa, fracture tou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B9/22
Inventor 黄海广李志敏曹占元史亚鸣卞辉杨兴灿谭兴元梁文浩
Owner YUNNAN TITANIUM IND
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