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Online non-oxidation heat treatment method for beta titanium alloy wire

A technology of non-oxidative heat treatment, beta titanium alloy, applied in the field of beta titanium alloy heat treatment, can solve the problem that beta titanium alloy cannot fully achieve solid solution treatment, wire surface oxidation, affecting material properties, etc., and achieves good solution treatment effect. Low cost and simple operation

Inactive Publication Date: 2012-05-30
西安赛特金属材料开发有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] So far, the heat treatment methods of β titanium alloy wire are divided into vacuum annealing and atmospheric annealing. However, the investment and cost of vacuum furnace equipment are large, and the cooling rate after annealing cannot meet the cooling rate requirements of solid solution treatment. , causing β-titanium alloys to fail to fully achieve the effect of solution treatment after vacuum annealing; and due to the lack of protection in atmospheric annealing, the surface of the wire material will be oxidized, which will affect the material properties and increase surface treatment processes such as pickling or polishing.

Method used

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  • Online non-oxidation heat treatment method for beta titanium alloy wire

Examples

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Effect test

Embodiment 1

[0027] A TB5 titanium alloy wire material with a diameter of Φ3.0mm is taken. This alloy contains (mass percentage): 15.1% vanadium, 3.2% chromium, 3.1% tin, 3.0% aluminum, and the balance is titanium. The wire is prepared from a TB5 titanium alloy wire with a diameter of Φ5.0 mm and cold stretched by a roll die, and the cold working deformation is 51%.

[0028] Surface pretreatment before annealing: Ultrasonic cleaning in a 60°C cleaning solution for 40 minutes to remove surface dirt on the titanium wire, drying surface moisture in a drying oven, the drying oven is controlled at 60°C, and the drying time is 40min.

[0029] The pretreated TB5 titanium alloy wire is sent into the tubular holding furnace through the damping pay-off device and the front guide for online annealing. The phase transition point of TB5 titanium alloy is about 750°C, so the furnace temperature is controlled at 780°C (slightly higher than the phase transition point). The take-up speed is set to 2 m / mi...

Embodiment 2

[0035] A Ti-20V-4Al-1Sn titanium alloy wire with a diameter of Φ4.0mm is taken. This alloy contains (mass percentage): 21.5% vanadium, 3.8% aluminum, 1.2% tin, and the balance is titanium. The wire is prepared by cold drawing the alloy wire with a diameter of Φ5.5mm through a roll die, and the cold working deformation is 49%.

[0036] Surface pretreatment before annealing: Ultrasonic cleaning for 30 minutes in a cleaning solution at 80°C to remove surface dirt on the titanium wire, and drying the surface moisture in a drying oven controlled at 50°C for a drying time of 30min.

[0037] The pretreated titanium alloy wire is sent into the tubular holding furnace through the damping pay-off device and the front guide for online annealing. The phase transition point of this titanium alloy is about 720°C, so the furnace temperature is controlled at 760°C (slightly higher than the phase transition point). The take-up speed is set to 3 m / min, the length of the annealing furnace is 9...

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Abstract

The invention discloses an online non-oxidation heat treatment method for a beta titanium alloy wire, which relates to a titanium alloy processing method and comprises the following steps: performing cold treatment on beta titanium alloy; performing surface pretreatment; and performing heat preservation for 3-10min under controlling the temperature of a protective tube-type furnace to be within a temperature range which is 0-100 DEG C higher than the phase transformation point of the alloy in an Ar (argon) atmosphere protection environment to finally obtain the bright beta titanium alloy wire with low deformation resistance and high deformability. The method is suitable for any beta titanium alloys. For example, the alloy contains 14.0-16.0 percent of vanadium, 2.5-3.5 percent of chromium, 2.5-3.5 percent of stannum, 2.5-3.5 percent of aluminum and the balance titanium by weight. Excellent mechanical properties that the tensile strength is 780MPa, the yield strength is 730MPa, the elongation is 21.5 percent and the reduction of section is 72 percent are obtained by the alloy wire through non-oxidation heat treatment performed after the cold treatment. The processing method is suitable for large-scale production modes.

Description

technical field [0001] The invention belongs to the technical field of beta titanium alloy heat treatment, and relates to an online heat treatment method for titanium alloy wires capable of obtaining high surface quality and excellent performance. Background technique [0002] β titanium alloy has high plasticity and excellent cold deformation performance, and can produce plates, rods and wires. The products have been widely used in aerospace, automobiles, chemicals, golf clubs and eyeglass frame supplies and other fields. For metastable β-titanium alloys, in order to obtain good plasticity and excellent cold deformation properties, the heat treatment method of solution treatment is often used to rapidly cool the high-temperature β-phase of titanium to room temperature so as to retain the β-phase. [0003] So far, the heat treatment methods of β titanium alloy wire are divided into vacuum annealing and atmospheric annealing. However, the investment and cost of vacuum furnace...

Claims

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Application Information

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IPC IPC(8): C22F1/18
Inventor 王文卓曹继敏胡琦贾兵然
Owner 西安赛特金属材料开发有限公司
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