High-strength casting titanium alloy and preparation method thereof

A casting titanium alloy, high-strength technology, applied in the field of titanium alloy material manufacturing, can solve problems such as lack and harshness, achieve the effects of inhibiting the deterioration of alloy high-temperature performance, good casting performance, and improving solid solution strengthening

Inactive Publication Date: 2019-05-17
NORTHWESTERN POLYTECHNICAL UNIV +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The key structural castings have relatively strict requirements on the material strength, most of which require the materia

Method used

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  • High-strength casting titanium alloy and preparation method thereof
  • High-strength casting titanium alloy and preparation method thereof
  • High-strength casting titanium alloy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0031] The preparation method of the above-mentioned alloy material comprises the following steps:

[0032] 1) Compound titanium sponge, aluminum bean, aluminum-molybdenum alloy, niobium-titanium alloy, sponge zirconium, titanium-tin alloy, and metal chromium according to the component content, and use a press and a mold to press the raw materials into a long strip electrode block;

[0033] 2) Use vacuum plasma welding, argon shielded plasma welding or vacuum electron beam welding to weld the pressed electrode blocks into long strip electrodes;

[0034] 3) using the strip electrode prepared in step 2) as a consumable electrode to smelt in a vacuum consumable arc furnace to obtain a primary ingot, the smelting voltage is 26-32V, and the smelting current is 8-10KA;

[0035] 4) Invert the primary ingot and perform secondary smelting in a vacuum consumable arc furnace as a consumable electrode to obtain a secondary ingot, the smelting voltage is 28-36V, and the smelting current is...

Example Embodiment

[0047] Example 1

[0048] Taking the preparation of Ti-6.0Al-1.8Sn-1.8Zr-3.0Mo-1.5Cr-1.2Nb-0.2Fe titanium alloy castings as an example

[0049] 1) Compound titanium sponge, aluminum bean, aluminum molybdenum alloy, niobium titanium alloy, sponge zirconium, titanium tin alloy and metal chromium according to the component content, and use a press and a mold to press the raw materials into a long strip electrode block.

[0050] 2) Use vacuum plasma welding, argon shielded plasma welding or vacuum electron beam welding to weld the pressed electrode blocks into long strip electrodes;

[0051] 3) using the strip electrode prepared in step 2) as a consumable electrode to smelt in a vacuum consumable arc furnace to obtain a primary ingot, the smelting voltage is 26V, and the smelting current is 8KA;

[0052] 4) Invert the primary ingot and carry out secondary smelting as a consumable electrode in a vacuum consumable arc furnace to obtain a secondary ingot, the smelting voltage is 28V...

Example Embodiment

[0068] Example 2

[0069] Taking the preparation of Ti-5.8Al-2.0Sn-2.0Zr-2.8Mo-1.2Cr-1.4Nb-0.20Fe titanium alloy castings as an example

[0070] 1) Compound titanium sponge, aluminum bean, aluminum molybdenum alloy, niobium titanium alloy, sponge zirconium, titanium tin alloy and metal chromium according to the component content, and use a press and a mold to press the raw materials into a long strip electrode block.

[0071] 2) Use vacuum plasma welding, argon shielded plasma welding or vacuum electron beam welding to weld the pressed electrode blocks into long strip electrodes;

[0072] 3) using the strip electrode prepared in step 2) as a consumable electrode to smelt in a vacuum consumable arc furnace to obtain a primary ingot, the smelting voltage is 27V, and the smelting current is 9KA;

[0073] 4) Invert the primary ingot and carry out secondary smelting as a consumable electrode in a vacuum consumable arc furnace to obtain a secondary ingot, the smelting voltage is 29...

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Abstract

The invention discloses high-strength casting titanium alloy and preparation method thereof. The preparation method comprises the following steps that titanium sponge, aluminum shots, aluminum-molybdenum alloy, niobium-titanium alloy, sponge zirconium, titanium-tin alloy and metal chromium are mixed according to the mass percentage of 5.2%-6.8% of Al, 1.6%-2.5% of Sn, 1.6%-2.5% Zr, 2.2%-4.0% of Mo, 0.8%-2.3% of Nb, 0.8%-2.2% of Cr, 0.1%-0.4% of Fe, less than or equal to 0.20% of O, less than or equal to 0.08% C, less than or equal to 0.05% N, less than or equal to 0.015% of H and the balance titanium, and are pressed to be made into strip-shaped electrode blocks; the pressed electrode blocks are assembled and welded into a strip-shaped electrode; the strip-shaped electrode is forged into acasting mother alloy electrode after smelting; and casting is performed, heat treatment is performed on the casting, and the high-strength casting titanium alloy is obtained. The high-strength casting titanium alloy is excellent in mechanical property, and can meet the high strength requirements of industrial complex structural parts for aviation equipment, aerospace equipment, weapon equipment and other equipment.

Description

technical field [0001] The invention belongs to the field of titanium alloy material manufacturing, and in particular relates to a high-strength casting titanium alloy and a preparation method thereof. The application technical fields include industries such as aviation, aerospace, and weaponry equipment manufacturing. Background technique [0002] Titanium and titanium alloys are widely used in many fields due to their excellent comprehensive properties such as high specific strength, corrosion resistance, weldability, high temperature resistance, and non-magnetic properties. But in contrast, the development of cast titanium alloys lags far behind wrought titanium alloys. In the 1950s, deformed titanium alloys began to be mass-produced and applied, while titanium alloy castings did not begin to be used in the petrochemical industry until the 1960s. The official application of titanium castings in the aviation industry has been in the 1970s, which is 20 years behind the app...

Claims

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Application Information

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IPC IPC(8): C22C14/00C22C1/03C22F1/18
Inventor 薛祥义刘小花余国康李金山张利军周中波张旭亮王军王宝兵范李鹏
Owner NORTHWESTERN POLYTECHNICAL UNIV
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