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Low density, high strength and high plasticity titanium alloy

A high-strength, high-plasticity technology, applied in the field of titanium alloys, can solve the problems of hardening and increase the brittleness of alloy materials, and achieve the effects of refining grains, inhibiting crystal nucleation, and reducing processing costs.

Inactive Publication Date: 2012-07-25
辽宁峰阁钛业集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when the Si content is too high, the silicide will harden, increasing the brittleness of the alloy material

Method used

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  • Low density, high strength and high plasticity titanium alloy
  • Low density, high strength and high plasticity titanium alloy

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Experimental program
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Embodiment 1

[0012] Table 1 The specific composition ratio of T91 alloy

[0013] serial number Pure aluminum / % Vanadium aluminum alloy / % Al-Si Alloy / % Sponge titanium / % Example 1 7.14 1.99 0.49 90.38 Example 2 6.84 1.99 0.49 90.68 Example 3 7.30 1.53 0.49 90.68 Example 4 7.60 1.53 0.49 90.38 Example 5 6.74 2.29 0.49 90.48 Example 6 7.44 1.99 0.49 90.08

[0014] Note: The above proportions are percentages by weight

[0015] The same alloy adopts two different processing technology systems, and adjusts the composition ratio of the alloy under the same technology system. Finally, through the comparison of mechanical properties, it is found that Ti-8.4Al-1.0V-0.21Si is forged at 1200°C and rolled at 990°C. It has high strength after annealing at 860°C and maintains high plasticity.

[0016] Table 2 T91 processing technology and mechanical properties

[0017]

[0018] The golf head manufacturing industry conducts ...

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Abstract

The invention relates to a low density, high strength and high plasticity titanium alloy. The technological key points are as follows: the titanium alloy comprises metal titanium as the main component, a small amount of metal aluminum, metal iron, metal vanadium, silicon element, and inevitable impurities. Because of adding the small amount of noble metal V with same crystal structure with the titanium and capable of playing the role in suppressing the crystal nucleation and refining the crystal grains, the alloy has relatively high plasticity in the situation of ensuring the high intensity. The added Al replaces the noble metal V and the titanium sponge, thus the cost of the alloy is reduced, the addition of the small amount of the Si element increases the strength and the oxidation resistance of the alloy, the processability of the alloy is good, the process steps are simple, the process cost is low, and the alloy is easily produced. The alloy meets the requirements of various application fields for the low cost, high strength and high plasticity titanium alloy.

Description

technical field [0001] The invention belongs to the technical field of titanium alloy in titanium metal. It is a titanium alloy with low density, high strength and high ductility. Background technique [0002] Titanium and titanium alloys are widely used in various fields because of their high specific strength, corrosion resistance, heat resistance and many other advantages. Especially in some specific industries, the demand for titanium alloys with high strength and low cost is constantly increasing. [0003] At present, the tensile strength of titanium alloys strengthened solely by alloying generally does not exceed 1000MPa at room temperature. If a higher-strength structural titanium alloy is required, heat treatment is required to increase the strength. Typical heat treatment strengthened α+β-type titanium alloys Ti-6Al-4V, BT14, BT23, near metastable β-type titanium alloys BT22, Ti-10V-2Fe-3Al, metastable β-type titanium alloys BT15, Ti-8-8 -2-3 and Ti-3-8-6-4-4(βc)...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C14/00C22C1/03C22F1/18
Inventor 张军
Owner 辽宁峰阁钛业集团有限公司
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