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Smelting method of high-niobium-content titanium alloy material

A technology of titanium alloy and high niobium content, which is applied in the field of smelting titanium alloy materials with high niobium content, to achieve the effects of reducing difficulties, avoiding inclusions and segregation, and achieving significant economic benefits

Inactive Publication Date: 2020-12-25
BAOJI TITANIUM IND CO LTD
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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 avoid and overcome the above hidden dangers and problems in the smelting process, and provide a smelting method suitable for titanium alloy materials with high niobium content, thereby effectively reducing the difficulty of smelting titanium alloys with high niobium content in a vacuum consumable electric arc furnace. Further Improving the Composition Uniformity of High Niobium Content Titanium Alloy Ingots

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Taking Ti-19Nb-(0.5-2%)Mo-(3-5%)Zr-(7-9%)Sn-(0.1-0.3%)O as an example to illustrate the preparation method of the present invention.

[0035] ingredients, pressing

[0036] Sponge titanium, sponge zirconium, and Ti-32Mo, Ti-80Sn and other intermediate alloys are used as raw materials, and the ratio by weight percentage is sponge zirconium: 4%, Ti-32Mo:%, Ti-80Sn:% Mixing 200kg, using a hydraulic press Press into an electrode block with a single weight of 5kg.

[0037] Electrode preparation

[0038] Connect the pressed electrode blocks head to tail and weld the long strip electrodes, and then weld the pre-cut niobium strips (19% by weight) evenly around the long strip electrodes to form the final consumable electrodes; the welding vacuum is less than 8Pa .

[0039] Ingot Melting

[0040] The welded long strip electrodes are used as consumable electrodes for the first melting in a vacuum consumable electric arc furnace to obtain an ingot, the melting current is contro...

Embodiment 2

[0047] Taking Ti-24Nb-4Zr-7.9Sn as an example to illustrate the preparation method of the present invention.

[0048] 1) Ingredients, pressing

[0049] Sponge titanium, sponge zirconium, and Ti-80Sn master alloy are used as raw materials, and the ratio of sponge zirconium: 4%, Ti-80Sn:% is 200kg by weight, and the electrode block with a single weight of 5kg is pressed by a hydraulic press.

[0050] 2) Electrode preparation

[0051] Connect the pressed electrode blocks head to tail and weld the long strip electrodes, and then weld the pre-cut niobium strips (24% by weight) evenly around the long strip electrodes to form the final consumable electrodes; the welding vacuum is less than 8Pa .

[0052] 3) Ingot melting

[0053] The welded long strip electrodes are used as consumable electrodes for the first melting in a vacuum consumable electric arc furnace to obtain an ingot, the melting current is controlled at 1.5-3.0KA, and the melting voltage is 26-30W; then the primary in...

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Abstract

The invention relates to a smelting method of a high-niobium-content titanium alloy material. The method comprises the following steps that titanium alloy with the high niobium content is burdened according to the components except the niobium element, and the titanium alloy is pressed into an electrode on a hydraulic press and then is bundled or welded with a niobium batten; and afterwards, the combined electrode is smelted for three times through a vacuum consumable electrode arc furnace, a shell type furnace and a vacuum consumable electrode arc furnace in sequence, and finally a high-niobium-content titanium alloy cast ingot with uniform components is obtained. According to the method, in the electrode preparation process before smelting, the niobium alloy element is added in the modethat the niobium batten is bundled and welded with consumable electrodes, and the one-time vacuum shell type furnace smelting mode is adopted, so that the conditions that in a traditional mode, the niobium elements are all added in a Ti-Nb intermediate alloy mode, the ratio of intermediate alloy to titanium sponge is too large, the finally-pressed consumable electrodes are insufficient in strength, the intermediate alloy can scatter or fall off easily in the smelting process, and the situations of inclusion, segregation or uneven smelting of high-melting-point metal are formed can be effectively avoided.

Description

technical field [0001] The invention relates to a method for smelting titanium alloy materials with high niobium content, and belongs to the technical field of titanium alloy material preparation. Background technique [0002] Compared with traditional medical metal materials such as stainless steel and cobalt-chromium-molybdenum alloys, titanium and titanium alloys have gradually become the most important medical materials for orthopedics, implants, and oral restorations due to their good comprehensive mechanical properties, corrosion resistance, and excellent biocompatibility. material of choice in the field. In recent years, with the continuous development of biomedical titanium and titanium alloys, new high-strength medical titanium alloys containing non-toxic elements, better biocompatibility, and lower elastic modulus have been developed to meet clinical requirements for implants. Requirements, become the main development target of the third generation of biomedical t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C14/00C22C1/03C22C1/10C22C32/00
CPCC22C1/03C22C1/1036C22C14/00C22C32/0031
Inventor 杨奇任春燕王磊华檀雯吝媛关蕾张平辉尹胜利
Owner BAOJI TITANIUM IND CO LTD
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