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Low-cost titanium alloy and preparation method thereof

A titanium alloy, low-cost technology, applied in the field of low-cost titanium alloy and its preparation, can solve the problems of low density, high specific strength and high temperature resistance, high cost of titanium alloy, high cost restricting the application scope of titanium and titanium alloy, etc. , to achieve the effect of small structure, cost reduction and uniform alloy composition

Inactive Publication Date: 2017-01-11
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Due to their low density, high specific strength, high temperature resistance, corrosion resistance, non-magnetic, biocompatibility and other excellent properties, titanium and titanium alloys have been widely used in aviation, aerospace, ships and other fields. However, the high cost of titanium limits the use of titanium. And the application range of titanium alloy, especially in the civil field
At present, most of the alloying elements in industrial titanium alloys use precious metals such as V, Mo, Nb, Zr, Sn and Ta, which makes the cost of titanium alloys remain high and affects the scope of use of titanium alloys.

Method used

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  • Low-cost titanium alloy and preparation method thereof
  • Low-cost titanium alloy and preparation method thereof
  • Low-cost titanium alloy and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0039] 1. The element ratios of the alloy composition design of the present application are shown in Table 3.

[0040] 2. Proportion the purchased sponge titanium, Fe-B intermediate alloy and industrial pure iron according to the ratio of 1.5kg per ingot, and then put them into the water-cooled copper crucible of the cold crucible suspension melting furnace, vacuumize the furnace body and pass Argon gas with a purity of 99.999% is fed in at a rate of 0.5×10 5 The high-purity argon gas of Pa is used for the first melting of the alloy for 20 minutes at 1500 °C.

[0041] 3. After the ingot is fully cooled, turn the ingot upside down and put it into a water-cooled copper crucible for re-melting to homogenize the alloy composition, and repeat this for 3-4 times.

[0042] 4. According to the GB / T23605-2009 method for measuring the beta transition temperature of titanium alloys, the phase transition temperature of the obtained alloy was measured.

[0043] 5. The ingot is forged at ...

Embodiment 2

[0051] (1) Table 5 shows the element ratios of the alloy composition design of the present application.

[0052] (2) Proportion the purchased sponge titanium, Fe-B intermediate alloy, and industrial pure iron according to the ratio of 1.5kg per ingot, and then put them into the water-cooled copper crucible of the cold crucible suspension melting furnace, and vacuumize the furnace body Introduce argon gas with a purity of 99.999%, and the inflow volume is 0.6×10 5The high-purity argon gas of Pa is used for the first melting of the alloy at 1800°C for 10 minutes.

[0053] (3) After the ingot is fully cooled, turn the ingot upside down and put it into a water-cooled copper crucible for re-melting to homogenize the alloy composition, and repeat this process for 3-4 times.

[0054] (4) According to the GB / T 23605-2009 method for measuring the β-transition temperature of titanium alloys, the phase transition temperature of the obtained alloy was measured.

[0055] (5) The ingot is...

Embodiment 3

[0063] (1) Table 7 shows the element ratios of the alloy composition design of the present application.

[0064] (2) Proportion the purchased sponge titanium, Fe-B intermediate alloy, and industrial pure iron according to the ratio of 1.5kg per ingot, and then put them into the water-cooled copper crucible of the cold crucible suspension melting furnace, and vacuumize the furnace body Introduce argon gas with a purity of 99.999%, and the inflow volume is 0.5×10 5 The high-purity argon gas of Pa is used for the first melting of the alloy at 1600 ° C for 15 minutes.

[0065] (3) After the ingot is fully cooled, turn the ingot upside down and put it into a water-cooled copper crucible for re-melting to homogenize the alloy composition, and repeat this process for 3-4 times.

[0066] (4) According to the GB / T 23605-2009 method for measuring the β-transition temperature of titanium alloys, the phase transition temperature of the obtained alloy was measured.

[0067] (5) The ingot...

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Abstract

The invention discloses a low-cost titanium alloy and a preparation method thereof. In the titanium alloy, titanium is used as a main body element, and an alpha stable element B and a beta stable element Fe are used as alloy elements. The titanium alloy is composed of 0.5-5 wt.% of Fe, 0.05-0.2 wt.% of B, and the balance of titanium and inevitable impurities. The preparation method comprises the following steps: adding raw materials into an argon-introduced cold crucible levitation melting furnace according to the designed alloy component proportion, repeatedly melting to obtain a cast ingot, carrying out cogging forging on the cast ingot at the temperature of higher than the phase transformation point, sampling the forged alloy, carrying out heat treatment, and finally, carrying out structure and performance characterization. The titanium alloy provided by the invention has the advantages of uniform alloy components, fine structure, high tensile strength (up to 750-850 MPa), high elongation percentage (10-15%) and low cost, and can substitute partial high-price titanium alloys in some fields.

Description

technical field [0001] The application relates to a low-cost titanium alloy and a preparation method thereof, belonging to the technical field of titanium alloy materials. Background technique [0002] Due to their low density, high specific strength, high temperature resistance, corrosion resistance, non-magnetic, biocompatibility and other excellent properties, titanium and titanium alloys have been widely used in aviation, aerospace, ships and other fields. However, the high cost of titanium limits the use of titanium. And the application scope of titanium alloy, especially in the civil field. At present, most of the alloying elements in industrial titanium alloys use precious metals such as V, Mo, Nb, Zr, Sn and Ta, which makes the cost of titanium alloys remain high and affects the scope of use of titanium alloys. [0003] At present, the ways to reduce the cost of titanium alloys include: reducing the cost of raw materials by improving the production method of raw mat...

Claims

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Application Information

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IPC IPC(8): C22C14/00C22C1/03C22F1/18
CPCC22C1/03C22C14/00C22F1/183
Inventor 常辉董月成张尧淡振华郭艳华虞尧成周廉
Owner NANJING UNIV OF TECH
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