TC11 titanium alloy and technique for optimizing performance of TC11 titanium alloy

A TC11, titanium alloy technology, applied in the field of titanium alloys, can solve the problems of poor welding performance, poor formability, high price, etc., and achieve the effect of good metallographic structure and good comprehensive mechanical properties

Inactive Publication Date: 2016-02-03
周萌
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Problems solved by technology

[0004]Although titanium alloy parts have such superior properties, there is still a long way to go before titanium and its alloys are widely used in the automotive industry. The reasons include high price, Poor formability and poor welding performance

Method used

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  • TC11 titanium alloy and technique for optimizing performance of TC11 titanium alloy

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Embodiment Construction

[0011] A TC11 titanium alloy, the weight percent of its raw material components is: Al: 4.4-5.7%, Mo: 4.4-5.7%, V: 4.4-5.7%, Cr: 0.5-1.5%, Fe: 0.5-1.5%, C <0.1%, Zr:<0.3%, Si<0.15%, O<0.18%, N<0.05%, H<0.015%, and the rest is Ti. The raw materials are synthesized into TC11 alloy according to the conventional method, and then the alloy is combined with 700- Keep the temperature at 950°C for 1 hour, and then cool the alloy with water, air or in a furnace to below 350°C. The holding temperature is: 900°C, and the cooling method is: cooling down to below 350°C in the furnace.

[0012] The results of the tensile test show that the tensile strength of the TC11 titanium alloy under water-cooling conditions shows an obvious downward trend with the increase of the heating temperature, and can be roughly divided into three stages according to the speed of the σb decrease: the temperature range of 700-800 °C decreases the fastest , dropped rapidly from 1100MPa to about 900MPa; σb stabil...

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Abstract

The invention discloses TC11 titanium alloy. The TC11 titanium alloy is characterized by being prepared from, by weight, 4.4%-5.7% of Al, 4.4%-5.7% of Mo, 4.4%-5.7% of V, 0.5%-1.5% of Cr, 0.5%-1.5% of Fe, 0%-0.1% of C, 0%-0.3% of Zr, 0%-0.15% of Si, 0%-0.18% of O, 0%-0.05% of N, 0%-0.015% of H and the balance Ti. The raw materials are synthetized into the TC11 alloy according to a conventional method, then heat preservation is conducted on the alloy at the temperature of 700-950 DEG C, and then the alloy is cooled to be at the temperature below 350 DEG C through water cooling or air cooling or cooling in a furnace.

Description

technical field [0001] The invention relates to a titanium alloy, in particular to a TC11 titanium alloy and its performance optimization process. Background technique [0002] Titanium alloy has high strength and low density, good mechanical properties, good toughness and corrosion resistance. In addition, the process performance of titanium alloy is poor, and it is difficult to cut and process. During thermal processing, it is very easy to absorb impurities such as hydrogen, oxygen, nitrogen, and carbon. Also have poor wear resistance, complex production process. The industrial production of titanium began in 1948. The needs of the development of the aviation industry make the titanium industry develop at an average annual growth rate of about 8%. The annual output of titanium alloy processing materials in the world has reached more than 40,000 tons, and there are nearly 30 kinds of titanium alloy grades. The most widely used titanium alloys are Ti-6Al-4V (TC4), Ti-5Al...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C14/00C22F1/18
Inventor 周萌
Owner 周萌
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