Short-flow preparation method of aluminum-containing titanium alloy

An aluminum-titanium alloy and short-process technology, which is applied to the field of short-process preparation of aluminum-titanium alloys, can solve the problems of uneven alloy composition and structure, difficulty in alloy composition control, increased consumption of smelting raw materials, etc., and achieves easy alloy composition, melting and casting. The effect of short process flow and reduced number of castings

Pending Publication Date: 2021-05-28
XINJIANG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The smelting temperature of titanium-aluminum alloy is usually 4800-20000°C, which is 7-30 times higher than the melting point of aluminum. When smelting titanium alloys with high aluminum content, the evaporation loss of aluminum reaches 44%, resulting in increased consumption of smelting raw materials and increased costs. , especially difficult to control alloy composition
After the alloy is smelted repeatedly, there are still high-aluminum defect areas and low-aluminum defect areas in the structure, which seriously affect the performance of the final product due to the inhomogeneity of the alloy composition and structure

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Example 1: Melting (TA6) Ti-5Al titanium alloy ingot

[0029] ⑴Choose No. 0 sponge titanium and 7.4% aluminum sponge titanium as raw materials, send the raw materials to the drying furnace for drying, remove the adsorbed moisture in the raw materials, dry and finish the drying, and the raw materials are directly out of the oven.

[0030] (2) No. 0 titanium sponge and titanium sponge containing 7.4% aluminum are compounded according to the nominal composition of TA6 alloy: Ti-5Al, the nominal composition of aluminum is 5.0%, and 0.5% of aluminum needs to be added in consideration of volatilization loss, and the composition of the composition is 5.5%. The prepared charge is smelted on the vacuum consumable electric arc furnace. When performing vacuum consumable arc melting, it is necessary to pass in a high-purity argon protective atmosphere to reduce the volatilization loss of aluminum and remove fugitive from the alloy. out gas. The chemical composition of the finished...

Embodiment 2

[0031] Example 2: Melting (TA18) Ti-3Al-2.5V titanium alloy ingot

[0032] ⑴Choose No. 0 sponge titanium, 6.9% aluminum-containing sponge titanium, and 4.3% vanadium-containing titanium sponge as raw materials, send the raw materials to the drying furnace for drying, remove the adsorbed moisture in the raw materials, dry and dry, and the raw materials are directly out of the oven.

[0033] (2) No. 0 titanium sponge, titanium sponge containing 6.9% aluminum, and titanium sponge containing 4.3% vanadium are formulated according to the nominal composition of TA18 alloy: Ti-3Al-2.5V, the nominal composition of aluminum is 3.0%, and 0.4% of aluminum needs to be supplemented in consideration of volatilization loss ; The nominal composition of vanadium is 2.5%, and the ingredient composition is 2.5%. The prepared charge is smelted on the electron beam cooling bed melting or plasma cooling bed melting furnace. When electron beam or plasma cooling bed melting is carried out, a high-pur...

Embodiment 3

[0034] Example 3: Melting (TA7) Ti-5Al-2.5Sn titanium alloy ingot

[0035] ⑴Choose No. 0 sponge titanium, 7.3% aluminum-containing sponge titanium, and 5.6% tin-containing titanium sponge as raw materials, send the raw materials to the drying furnace for drying, remove the adsorbed moisture in the raw materials, dry and dry, and the raw materials are directly released from the oven.

[0036] (2) No. 0 titanium sponge, titanium sponge containing 7.3% aluminum, and titanium sponge containing 5.6% tin are formulated according to the nominal composition of TA7 alloy: Ti-5Al-2.5Sn, the nominal composition of aluminum is 5.0%, and 0.5% of aluminum needs to be supplemented in consideration of volatilization loss , the ingredients are 5.5%; the nominal composition of tin is 2.5%, considering the volatilization loss needs to add 0.7% aluminum, and the ingredients are 3.2%. The prepared charge is smelted on the electron beam cooling bed melting or plasma cooling bed melting furnace. Whe...

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PUM

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Abstract

The invention discloses a short-flow preparation method of an aluminum-containing titanium alloy. Common titanium sponge or titanium-based sponge alloy (which is prepared by metallurgy of titanium, aluminum, tin, molybdenum and the like, alloying of titanium, aluminum, tin, zirconium, molybdenum and the like and merging in one technological process) is used as a raw material, and a low-cost and high-quality titanium alloy cast ingot is obtained through one-time smelting and casting by adopting an electron beam or plasma or induction or vacuum self-consuming electric arc smelting technology. The raw material cost is low, a multi-component alloy element preparation process required by a traditional process is omitted, a repeated remelting casting (casting for 2-4 times) process of a titanium alloy ingot is omitted, the process is simplified, the flow is shortened, the casting cost is reduced, and the casting efficiency is improved. As the high-temperature and high-vacuum casting times are reduced by about 70%, the oxidation and volatilization loss of aluminum, tin, manganese and the like is greatly reduced, alloy components are easier to control, and the quality of the cast ingot is greatly improved.

Description

technical field [0001] The invention relates to the smelting of titanium and titanium alloys, belongs to the technical field of non-ferrous metal casting and processing, and in particular relates to a short-process preparation method of aluminum-containing titanium alloys. Background technique [0002] Although titanium alloys have the advantages of light weight, high strength, heat resistance, corrosion resistance, non-magnetic properties and good biocompatibility, the application of titanium and titanium alloys is still mainly limited to aerospace, military ships and special chemical corrosion resistance fields. However, the main obstacle affecting the widespread application of titanium alloys is still cost. High raw material costs and high processing costs are the key factors restricting the wide application of titanium alloys. [0003] At present, the production of aluminum-containing titanium alloys is based on sponge titanium, electrolytic aluminum ingots, etc., and i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/02C22C14/00C22B9/20C22B9/22
CPCC22C1/02C22C14/00C22B9/20C22B9/228Y02P10/25
Inventor 贺永东陈艳华孙郅程
Owner XINJIANG UNIVERSITY
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