Fusion casting method of large-size high-performance titanium and titanium alloy ingot

A titanium alloy, high-performance technology, applied in the field of melting and casting of large-scale high-performance titanium and titanium alloy ingots, can solve problems such as adverse effects on mechanical properties, low efficiency, and failure to meet the application requirements of titanium and titanium alloys, and achieve improved metallographic microscopic Organizational structure, overcoming segregation, and avoiding the effects of coarse grain boundaries

Inactive Publication Date: 2011-03-30
BAOJI LIXING TITANIUM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The efficiency of traditional small-scale titanium and titanium alloy smelting is low, and the segregation of the chemical composition of titanium alloy and the unsatisfactory metallographic structure have a negative impact on its mechanical properties, which cannot meet

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0014] Example 1: TA2 pure titanium ingot smelting.

[0015] (1) Pressed electrode: ZEROLIMIT sponge titanium pressed electrode, density> 3.2g / cm 3 , The weight of the electrode block is 100Kg, the number of electrode blocks is 50, and the total weight of the electrode is 5000Kg;

[0016] (2) Assembly welding electrode: The compressed electrode block is assembled into a large consumable electrode by argon arc welding, and the electrode end face of the assembly welding is perpendicular to the length direction, and the electrode curvature is ≤5‰;

[0017] (3) One-time vacuum consumable smelting: Put the assembled electrodes into a vacuum consumable electrode arc furnace φ720mm crucible for one smelting, the working vacuum in the furnace is ≤0.08×10pa, the melting current is 10-28KA, and the melting voltage 20~40V, the water temperature is 20~50℃, the smelted ingot is naturally cooled for 2~4 hours and then it is discharged into a φ720mm primary ingot, and the discharge temperature is l...

Example Embodiment

[0019] Example 2: TC4 titanium alloy ingot melting.

[0020] (1) Pressed electrode: The electrode is pressed after mixing 89.64Kg of titanium sponge, 7.150Kg of Al-V master alloy, and 3.210Kg of Al bean, with a density of >3.2g / cm 3 , The weight of the pressed electrode block is 100kg. The weight of the electrode block is 100Kg, the number of electrode blocks is 50, and the total weight of the electrode is 5000Kg;

[0021] (2) Assembly welding electrode: The compressed electrode block is assembled into a large consumable electrode by argon arc welding, and the electrode end face of the assembly welding is perpendicular to the length direction, and the electrode curvature is ≤5‰;

[0022] (3) One-time vacuum consumable smelting: Put the assembled electrodes into a vacuum consumable electrode arc furnace φ640mm crucible for one smelting. The working vacuum in the furnace is ≤0.08×10pa, the melting current is 10~28KA, and the melting voltage 20~40V, the water temperature is 20~50℃, the...

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Abstract

The invention relates to a fusion casting method of a large-size high-performance titanium and titanium alloy ingot, which comprises the following steps: (1) electrode compression: compressing pure titanium or titanium alloy materials into electrode blocks; (2) assembly and welding of an electrode: carrying out argon arc welding on the compressed electrode blocks to obtain a large consumable electrode; (3) primary vacuum consumable fusion: carrying out primary fusion on the assembled and welded electrode in a vacuum consumable-electrode arc furnace to obtain a primary cast ingot; and (4) secondary vacuum consumable fusion: carrying out secondary fusion on the primary cast ingot used as the electrode to obtain a finished cast ingot product. Compared with the prior art, the invention can effectively overcome the segregation of alloy components in the titanium alloy and improve the metallographical microscopic structure, thereby preventing the fusion ingot from being subject to coarse grain boundary, embrittlement of carbide networks and the like, reducing the generation of cracks, enhancing the strength and the mechanical property of the titanium alloy and improving the fusion efficiency.

Description

technical field [0001] The invention relates to a method for melting and casting large-scale high-performance titanium and titanium alloy ingots. Background technique [0002] Titanium and titanium alloys have light weight, high strength, corrosion resistance and excellent mechanical properties. Its application has expanded from chemical industry, energy, environmental protection, etc. to high-tech fields such as naval vessels, aviation, and aerospace. At the same time, higher requirements are put forward for the performance of titanium and titanium alloys. The efficiency of traditional small-scale titanium and titanium alloy smelting is low, and the segregation of the chemical composition of titanium alloy and the unsatisfactory metallographic structure have a negative impact on its mechanical properties, which cannot meet the growing demands of titanium and titanium alloys in various fields, especially aviation and aerospace. growing application requirements. In the prio...

Claims

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Application Information

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IPC IPC(8): C22B9/20C22B34/12C22C1/02C22C14/00
Inventor 赵坤
Owner BAOJI LIXING TITANIUM IND
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