Method for preparing large-specification TC4 titanium alloy cast ingot through high-proportion defective titanium materials

A technology with a high proportion of titanium residues is applied in the field of preparing large-scale TC4 titanium alloy ingots with high proportions of titanium residues, and can solve the problems of affecting the composition and surface quality of the ingots, low production efficiency, and low addition of residual materials, etc. Achieve the effect of improving the yield and production efficiency, saving costs, and uniform composition

Active Publication Date: 2018-08-03
WESTERN TITANIUM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A traditional method is to mix swarf-like TC4 titanium residues with sponge titanium (including intermediate alloys) to press electrode supports, and melt them into ingots. The addition of residues in this method is low, generally below 30%, and during the smelting process Easy to drop; the other is to use all block or sheet-like residues to bundle and weld the residue electrode. Due to the uneven shape of the residue, there is a possibility of foreign matter entering during the welding process of consumable elect...

Method used

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  • Method for preparing large-specification TC4 titanium alloy cast ingot through high-proportion defective titanium materials
  • Method for preparing large-specification TC4 titanium alloy cast ingot through high-proportion defective titanium materials
  • Method for preparing large-specification TC4 titanium alloy cast ingot through high-proportion defective titanium materials

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Experimental program
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Effect test

Embodiment 1

[0029] This embodiment includes the following steps:

[0030] Step 1. Grinding, sawing, pickling and drying the block and flake TC4 residues in order to make the surface silvery white without acid stains and visible pollutants, and then use a strapping machine to dry The final TC4 residual material is bundled into 2 residual material electrodes, so that the TC4 residual material in the 2 residual material electrodes does not loosen and fall off; the diameter of the 2 residual material electrodes is 320mm, and the length is 4000mm;

[0031] Step 2. Use a plasma torch to weld the two residual electrodes obtained in step 1, and then use an angle grinder with a steel brush to clean the oxides at the solder joints formed by welding on the residual electrodes, so that the solder joints are silver white;

[0032] Step 3, placing the cleaned residue electrode in step 2 in a vacuum consumable electric arc furnace for two smelting to obtain 2 intermediate ingots; the diameters of the 2...

Embodiment 2

[0041] This embodiment includes the following steps:

[0042] Step 1. Grinding, sawing, pickling and drying the block and flake TC4 residues in order to make the surface silvery white without acid stains and visible pollutants, and then use a strapping machine to dry The final TC4 residual material is bundled into 4 residual material electrodes, so that the TC4 residual material in the 4 residual material electrodes does not loosen and fall off; the diameter of the 4 residual material electrodes is 320mm, and the length is 4000mm;

[0043] Step 2. Use a plasma torch to weld the 4 residual electrodes obtained in step 1, and then use an angle grinder with a steel brush to clean the oxides at the solder joints formed by welding on the residual electrodes, so that the solder joints are silver white;

[0044] Step 3, placing the cleaned residue electrode in step 2 in a vacuum consumable electric arc furnace for two smelting to obtain 2 intermediate ingots; the diameters of the 2 i...

Embodiment 3

[0053] This embodiment includes the following steps:

[0054] Step 1. Grinding, sawing, pickling and drying the block and flake TC4 residues in order to make the surface silvery white without acid stains and visible pollutants, and then use a strapping machine to dry The final TC4 residual material is bundled into 4 residual material electrodes, so that the TC4 residual material in the 4 residual material electrodes does not loosen and fall off; the diameter of the 4 residual material electrodes is 480mm, and the length is 4000mm;

[0055] Step 2. Use a plasma torch to weld the 4 residual electrodes obtained in step 1, and then use an angle grinder with a steel brush to clean the oxides at the solder joints formed by welding on the residual electrodes, so that the solder joints are silver white;

[0056] Step 3, placing the cleaned residue electrode in step 2 in a vacuum consumable electric arc furnace for two smelting to obtain 2 intermediate ingots; the diameters of the 2 i...

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Abstract

The invention discloses a method for preparing a large-specification TC4 titanium alloy cast ingot through high-proportion defective titanium materials. The method comprises the steps that 1, the block-shaped and sheet defective TC4 materials are tied into defective material electrodes; 2, the defective material electrodes are welded and cleaned; 3, the cleaned defective material electrodes are smelted to obtain an intermediate cast ingot; 4, the intermediate cast ingot is subjected to one heating number forging, and a long-strip-shaped electrode is obtained and subjected to coping and pickling; 5, the long-strip-shaped electrode subjected to pickling and a sponge titanium electrode block are assembled and welded, and a consumable electrode is obtained and cleaned; and 6, the cleaned consumable electrode is smelted, and the TC4 titanium alloy cast ingot is obtained. According to the method, through reasonable material distribution and multiple times of vacuum consumable electric arc smelting, the large-specification TC4 titanium alloy cast ingot is obtained, the adding proportion of the defective TC4 titanium materials is increased, the content nonuniformity of the defective TC4 titanium materials is reduced, the cleanliness of the TC4 cast ingot is ensured, and the yield and the production efficiency of the TC4 cast ingot are improved.

Description

technical field [0001] The invention belongs to the technical field of titanium material production engineering, and in particular relates to a method for preparing large-scale TC4 titanium alloy ingots by using high-proportion titanium residues. Background technique [0002] The processing cost of titanium material is high, and the finished product rate is low. After smelting and deep processing of raw material sponge titanium, there will be about 30% to 35% residues, most of which can be recycled. According to statistics, the profit of residual titanium recycling reaches more than 60%, which produces huge economic benefits. Therefore, in order to reduce costs, reduce waste of resources, and provide raw material security, it is necessary to make full use of residual materials. [0003] TC4 is the most widely used titanium alloy and occupies a pivotal position in today's international titanium alloy market. A large number of residual waste materials will be produced in the...

Claims

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Application Information

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IPC IPC(8): C22B9/20C22B34/12C22C1/02C22C14/00
CPCC22B9/20C22B34/1295C22C1/02C22C14/00Y02P10/20
Inventor 廖强葛鹏贠鹏飞张娜刘华王超南弋可杨鹏飞
Owner WESTERN TITANIUM TECH
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