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Titanium alloy and processing method thereof

A processing method and titanium alloy technology, applied in the field of titanium alloy and its preparation method, can solve the problems of impact performance index gap, low longitudinal impact performance index steel, etc., and achieve the effect of meeting the material demand of mining equipment

Active Publication Date: 2014-07-02
BAOJI TITANIUM IND CO LTD
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Problems solved by technology

[0010] Comparing Table 1 and Table 2, it can be seen that the mechanical properties of Ti-6Al-4V grade titanium alloy and P110 steel grade are equivalent, but the longitudinal impact performance index is significantly lower than that of steel. From the previous measured data of processed materials, it is consistent with the impact performance index in Table 1. There is also a certain gap

Method used

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  • Titanium alloy and processing method thereof
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  • Titanium alloy and processing method thereof

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Experimental program
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Embodiment 1

[0025] Batching by weight percentage, smelting Ti-6Al-4V and titanium alloy ingot of the present invention respectively one each, wherein Ti-6Al-4V target composition is Al: 6.0%, V: 4.0%, Ti surplus; Titanium of the present invention The target composition of the alloy ingot is Al: 6.0%, V: 4.0%, Zr: 0.35%, Mo: 0.35%, and the balance of Ti.

[0026] The ingot was smelted twice in a vacuum consumable electric arc furnace. The ingot was heated and forged at 150°C above the phase transition point, with a deformation of 72%, and heated at 40°C below the phase transition point, with a forging deformation of 78%. Heating at the temperature of the phase transition point, the forging deformation is 60%, and the forging is 125mm bar.

[0027] The performance was tested after being annealed in an air-cooled electric furnace at 700°C for 2 hours, and the data are shown in Table 3.

[0028] Table 3 Tensile properties at room temperature and impact properties at 0°C

[0029]

Embodiment 2

[0031] Batching by weight percentage, smelting Ti-6Al-4V and titanium alloy ingot of the present invention each one respectively, wherein Ti-6Al-4V target composition is Al: 6.5%, V: 4.4%, Ti surplus; Titanium of the present invention Alloy target composition is Al: 6.5%, V: 4.4%, Zr: 0.35%, Mo: 0.35%, Nb: 0.35%, Ti balance 。 The ingot is smelted twice in a vacuum consumable electric arc furnace. The ingot is heated and forged at 200 °C above the phase transition point, with a deformation of 75%. When heated at 40 °C below the phase transition point, the forged deformation is 70%. The 260mm billet is drilled and bored and the outer surface is machined to prepare an ingot for extrusion, and then heated and extruded at the temperature of the phase transition point to extrude into 108 22mm pipe, extrusion deformation is 90%.

[0032] After heat preservation at 650°C for 2 hours, the performance was tested after furnace cooling and vacuum annealing. The data are shown in Tabl...

Embodiment 3

[0035] Batching according to weight percentage, smelting one titanium alloy ingot of the present invention, the target composition is Al: 5.8%, V: 3.8%, Zr: 1.5%, Mo1.0%, Nb: 0.6%, Ti balance 。 The ingot was smelted twice in a vacuum consumable electric arc furnace. The ingot was heated and forged at 100°C above the phase transition point, with a deformation of 62%, and heated at 50°C below the phase transition point, with a forging deformation of 67%. Heating at the temperature of the phase transition point, the forging deformation is 69%, and the forging is 125mm bar.

[0036] The performance was tested after being annealed in an air-cooled electric furnace at 700°C for 2 hours, and the data are shown in Table 5.

[0037] table 5

[0038]

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Abstract

The invention provides a titanium alloy and a preparation method thereof, relates to a titanium alloy with high impact performance, and in particular relates to a titanium alloy with high impact performance for mining equipment of petroleum, natural gas and the like and a processing method thereof. The titanium alloy is characterized by consisting of the following components in percentage by weight: 5.5-6.8% of Al, 3.5-4.5% of V, 0.3-3.0% of Zr, 0.3-2.0% of Mo, 0-1.0% of Nb, and the balance of Ti and inevitable impurities. The performances of the titanium alloy, such as 0 DEG C impact performance and room-temperature tensile property, can meet the performance index requirements of P110 grade steel, and the titanium alloy can substitute the P110 grade steel and be applied in the industries of petroleum, natural gas and the like. Compared with various existing titanium alloys, the titanium alloy has the advantages that the impact performance is improved, and room-temperature tensile property and H2S, SO2, CO2 and seawater corrosion resistance of the alloy are also improved. The titanium alloy can effectively meet the requirement of the mining equipment in the petroleum and natural gas industries for materials.

Description

technical field [0001] A titanium alloy and a preparation method thereof relate to a high-impact titanium alloy, in particular a high-impact titanium alloy used for oil, natural gas and other mining equipment and a processing method thereof. Background technique [0002] At present, most of the processing materials used in domestic oil and natural gas mining equipment are steel or imported titanium alloy materials. 2 S, SO 2 , CO 2 And other corrosive media, with the large-scale mining of land and sea and the gradual increase of mining depth, the underground atmosphere is deteriorating day by day, and the corrosion resistance of steel has been difficult to meet the requirements of use. [0003] Due to the excellent corrosion resistance of titanium alloys, foreign countries such as the United States and Russia use high-performance titanium alloys instead of steel, and are gradually upgrading the technology of mining equipment, which greatly prolongs the service life of equi...

Claims

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Application Information

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IPC IPC(8): C22C14/00C22F1/18
Inventor 李献军羊玉兰邹武装王丽瑛徐哲冯军宁杨蓉乔璐代春杨慧丽
Owner BAOJI TITANIUM IND CO LTD
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