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High-strength and high-plasticity titanium alloy

A titanium alloy, high plasticity technology, applied in the field of titanium alloy, can solve problems such as brittleness, and achieve the effect of good processability, low processing cost and easy production

Inactive Publication Date: 2011-08-17
辽宁峰阁钛业集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Considering the cost factor, the eutectoid β-stabilizing element Fe has more advantages than the isomorphic Mo, V, and Nb, and its β-stabilizing effect is also stronger, but the binary element formed by this type of element and titanium and titanium added with Al Or in the ternary system, there is eutectoid transformation, and when the content is high, it is possible to form a compound phase, causing brittleness

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] Example 1: The composition of the alloy is Ti-6Al-1.7Fe-0.1Zr-0.1Si, which is Al: 6.0%, Fe: 1.7%, Zr: 0.1%, Si: 0.1%, and the balance is Ti and unavoidable impurities.

[0011] The raw material ratio is calculated by weight percentage: pure iron scraps 1.7%, aluminum beans 6.0%, aluminum silicon alloy 0.1%, pure zirconium powder 0.1%, grade 1 sponge titanium 92.2%.

[0012] ①The alloy ingot is forged at 1000℃, the finished product rolling temperature is controlled at 900℃, the alloy plate is processed by 790℃ / air cooling, and the mechanical properties of the alloy finished plate are: σ b : 1150MPa, σ 0.2 : 1120MPa, δ: 16%, ψ: 50%.

[0013] ②The alloy ingot is billeted forging at a temperature of 1000°C, and the finished rolling temperature is controlled at 880°C. The alloy plate is processed by 750°C / air cooling. The mechanical properties of the finished alloy plate are: b :1080MPa, σ 0.2 : 1040MPa, δ: 14%, ψ: 40%.

Embodiment 2

[0014] Example 2: The composition of the alloy is Ti-5.8Al-2Fe-0.12Zr-0.1Si, that is, Al: 5.8%, Fe: 2.0%, Zr: 0.12%, Si: 0.1%, and the balance is Ti and unavoidable impurities.

[0015] The raw material ratio is calculated by weight percentage: pure iron scrap 2.0%, aluminum bean 5.8%, aluminum silicon alloy 0.1%, pure zirconium powder 0.12%, grade 1 sponge titanium 92.08%.

[0016] ①The alloy ingot is forged at 1000℃, the rolling temperature of the finished bar is controlled at 900℃, the alloy bar is processed by 750℃ / air cooling, and the mechanical properties of the finished alloy bar are: σ b : 1060MPa, σ 0.2 : 1050MPa, δ: 14%, ψ: 45%.

[0017] ②The alloy ingot is billeted and forged at a temperature of 1000°C, the processing temperature of the finished wire is controlled at 880°C, the alloy wire is processed by 750°C / air cooling, and the mechanical properties of the finished alloy wire are: σ b : 1030MPa, σ 0.2 : 1000MPa, δ: 15%, ψ: 45%.

Embodiment 3

[0018] Example 3: The composition of the alloy is Ti-6.3Al-2Fe-0.15Zr-0.1Si, that is, Al: 6.3%, Fe: 2.0%, Zr: 0.15%, Si: 0.1%, and the balance is Ti and unavoidable impurities.

[0019] The raw material ratio is calculated by weight percentage: pure iron scrap 2.0%, aluminum bean 6.3%, aluminum silicon alloy 0.1%, pure zirconium powder 0.15%, grade 1 sponge titanium 92.2%.

[0020] ①The alloy ingot is forged at 1000℃, the finished product rolling temperature is controlled at 900℃, the alloy plate is processed by 790℃ / air cooling, and the mechanical properties of the alloy finished plate are: σ b : 1150MPa, σ 0.2 : 1120MPa, δ: 12%, ψ: 30%.

[0021] ②The alloy ingot is forged at 1000℃, the rolling temperature of the finished bar is controlled at 900℃, the alloy bar is processed by 750℃ / air cooling, and the mechanical properties of the finished alloy bar are: σ b : 1110MPa, σ 0.2 : 1070MPa, δ: 12%, ψ: 35%.

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Abstract

The invention discloses a high-strength and high-plasticity titanium alloy, which has the technical points that: the alloy comprises metal titanium serving as a main component, a small amount of metal aluminum, metal iron, metal zirconium and silicon elements and inevitable impurities. Since a small amount of Zr with refined grain structure is added, alpha and beta complete solid solutions can be formed with titanium. The alloy has higher plasticity under the condition of guaranteeing high strength; since noble metal V is replaced by Fe, the cost is greatly reduced in comparison with that of Ti-6Al-4V alloy; strength and oxidation resistance are improved through a small amount of Si elements; the alloy has high processability; a processing technique has simple procedures; the processing cost is low; and the alloy is easy to produce and meets the requirements for low-cost, high-strength and high-plasticity titanium alloy in each application field.

Description

Technical field [0001] The invention relates to the technical field of titanium alloys, in particular to a titanium alloy with high strength and high plasticity, and low production and processing costs. Background technique [0002] Titanium and titanium alloys have many advantages such as high specific strength, corrosion resistance, and high heat resistance, so they are more and more widely used in various fields. In particular, the demand and requirements for high-strength titanium alloys in some specific industries are constantly increasing. At present, the tensile strength of titanium alloy strengthened solely by alloying at room temperature generally does not exceed 110 kgf / mm 2 , If a higher-strength structural titanium alloy is needed, it is necessary to develop a heat-treatable titanium alloy. Typical heat treatment strengthened α+β type titanium alloy Ti-6Al-4V, BT14, BT23, near metastable β type titanium alloy BT22, Ti-10V-2Fe-3Al, metastable β type titanium alloy BT1...

Claims

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Application Information

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