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ti-5mo-5v-6cr-3al titanium alloy extruded pipe and its processing method

A processing method and titanium alloy technology, applied in the field of new metastable β-titanium alloy, can solve the problems of poor corrosion resistance, high-strength steel quality, weakening the carrying capacity of aircraft or ships, etc., and achieve high tensile strength and toughness good effect

Active Publication Date: 2016-02-24
GRIMAT ENG INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

High-strength steel has high quality and poor corrosion resistance, which weakens the carrying capacity of aircraft or ships. Therefore, it is necessary to develop a preparation process for high-strength and high-toughness titanium alloy extrusion pipes

Method used

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  • ti-5mo-5v-6cr-3al titanium alloy extruded pipe and its processing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] According to the following proportions, the main alloying element content (wt%) is: Mo4.8, V4.9, Cr6.0, Al3.1, Fe0.11, C0.008, N0.010, H0.0015, O0 .10, the balance being titanium. The ingredients are pressed into electrodes on a 2,000-ton oil press, and cast ingots are obtained by melting three times in a vacuum consumable electric furnace. The temperature of the vacuum consumable electric furnace is about 2000°C, and the diameter of the ingot is Φ510mm. The ingot is heated at 1150°C for 2 hours and forged into a Φ350mm bar. After the billet is blanked, it is punched on a 2,000-ton hydraulic press to obtain a tube blank of Φ350×Φ85×500mm, and then the inner and outer surfaces of the tube blank are covered with copper. After heating at ℃, a Φ99×Φ85×Lmm pipe was obtained on a 5000-ton extruder, aged at 600℃ for 2 hours, and sample 1 was obtained.

[0024] Repeat the same steps above to obtain 5 grades of extruded pipes of the same size including TA1, TA2, TA9, TA10 and T...

Embodiment 2

[0035] According to the following proportions, the main alloying element content (wt%) is: Mo4.5, V5.7, Cr5.5, Al3.5, Fe0.08, C0.005, N0.007, H0.0008, O0 .06, balance titanium. The ingredients are pressed into electrodes on a 2,000-ton hydraulic press, and the ingots are obtained through three times of melting in a vacuum consumable electric furnace. The diameter of the ingots is Φ400mm. The ingot was heated at 1050°C for 2 hours, and forged into a Φ300mm bar. After the billet was blanked, it was punched on a 2,000-ton hydraulic press to obtain a tube blank of Φ300×Φ72×500mm. After heating at ℃, a Φ80×Φ72×Lmm pipe was obtained on a 5000-ton extruder, aged at 480℃ for 8 hours, and sample 4 was obtained. The Φ80×Φ72×Lmm pipe was cut, and then welded by electron beam to obtain sample 5. Samples 4 and 5 were processed into Φ3mm unconventional tensile specimens. The test was completed on an AG50KNE ​​testing machine. The mechanical properties are shown in Table 4.

[0036] Table...

Embodiment 3

[0039] According to the following proportions, the main alloying element content (wt%) is: Mo5.7, V4.5, Cr6.5, Al2.5, Fe0.11, C0.015, N0.016, H0.003, O0 .12, the balance being titanium. The ingredients are pressed into electrodes on a 2,000-ton hydraulic press, and the ingots are obtained by melting three times in a vacuum consumable electric furnace. The diameter of the ingots is Φ550mm. The ingot was heated at 1200°C for 2 hours, and forged into a Φ380mm bar. After the billet was blanked, it was punched on a 2,000-ton hydraulic press to obtain a tube blank of Φ380×Φ90×500mm. After heating at ℃, a Φ120×Φ90×Lmm pipe was obtained on a 5000-ton extruder, aged at 650℃ for 1 hour, and sample 6 was obtained. The Φ120×Φ90×Lmm pipe was cut, and then welded with an electron beam to obtain sample 7. Samples 6 and 7 were processed into Φ5mm conventional tensile specimens, and the test was completed on an AG50KNE ​​testing machine. The mechanical properties are shown in Table 5.

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Abstract

The invention relates to a Ti-5Mo-5V-6Cr-3Al titanium alloy extruded tubular product and a processing method thereof. The titanium alloy extruded tubular product comprises the main alloy elements by weight percentage: 4.5%-5.7% of Mo, 4.5%-5.7% of V, 5.5%-6.5% of Cr, 2.5%-3.5% of Al, and the balance titanium. The tubular product is prepared on a large-tonnage extrusion machine; and because the tubular product has higher tensile strength, higher toughness and good welding performance, the tubular product can be widely applied in aviation, aerospace, petroleum, chemical industry and other fields.

Description

technical field [0001] The invention relates to a Ti-5Mo-5V-6Cr-3Al titanium alloy extruded pipe and a processing method thereof, belonging to the field of novel metastable β titanium alloys. Background technique [0002] At present, titanium alloy tubes mainly use low-strength titanium alloy materials such as TA1, TA2, TA9, TA10, Ti-3Al-2V, etc. Based on the limitation of its own strength, it is generally used in chemical industry or other equipment with low working pressure. In the field of equipment with relatively high working pressure, such as aerospace or some petrochemical equipment, high-strength steel pipes are mostly used. High-strength steel has high quality and poor corrosion resistance, which weakens the carrying capacity of aircraft or ships. Therefore, it is necessary to develop a preparation process for high-strength and high-toughness titanium alloy extrusion pipes. The Ti-5Mo-5V-6Cr-3Al titanium alloy extrusion pipe processing technology was developed unde...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C14/00C22F1/18
Inventor 魏衍广陶海明崔雪飞罗峥陈海珊
Owner GRIMAT ENG INST CO LTD
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