Preparation method for titanium alloy with high dynamic bearing performance and low cost

A titanium alloy and high dynamic technology, which is applied in the preparation of low-cost titanium alloy, the preparation of low-cost titanium alloy plate or bar with high dynamic performance, and the field of high dynamic load-bearing performance. Toughness measurement and other issues to achieve the effect of reducing the cost of the alloy

Active Publication Date: 2015-03-25
BAOJI TITANIUM IND +1
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

A large number of studies have shown that the dynamic bearing capacity cannot be measured by indicators such as strength, elongation, and toughness measured under static load conditions

Method used

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  • Preparation method for titanium alloy with high dynamic bearing performance and low cost

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preparation example Construction

[0025] The preparation method of the high dynamic load-carrying performance and low-cost titanium alloy bar or plate of the present invention comprises the following steps:

[0026] (1) Alloy target composition range

[0027] The composition of the alloying elements (percentage by weight) is as follows: aluminum 2.5% to 7.0%, vanadium 2.0% to 5.5%, iron less than or equal to 2.5%, oxygen 0.1% to 0.3%, other impurity elements less than 0.1% alone and the total less than 0.4%, The rest is titanium.

[0028] (2) Ingredients

[0029] According to the target ingredients described in step (1), the ingredients are mainly composed of: titanium alloy residue, titanium sponge, aluminum-vanadium master alloy, vanadium-iron master alloy, or three master alloys of aluminum-vanadium-iron A combination of one or more, as well as elemental aluminum or iron. The composition grade of titanium alloy residue is industrial pure titanium or titanium alloy containing at least one of the three ele...

Embodiment 1

[0035] According to the method provided by the present invention, a titanium alloy rod with high impact absorption energy-high dynamic plasticity and low cost is prepared, and the specific steps are as follows:

[0036] Step (1) Determine the alloy target composition

[0037] The nominal composition is: Ti-2.5Al-5V-2.5Fe-0.2O. Other impurity elements are less than 0.1% alone and less than 0.4% in total.

[0038] Step (2) Ingredients

[0039] According to the target composition of step (1), according to the ingot weight of 100kg, the ingredients are 20kg of Ti-10V-2Fe-3Al or TB6 alloy residue, 72.8kg of titanium sponge, 1.8kg of aluminum-50 vanadium master alloy, iron -50 vanadium master alloy 4.2kg, aluminum beans 1.0kg, titanium dioxide 0.2kg. The residual material is crushed into a lath shape with a width and thickness not greater than 20mm.

[0040] Step (3) Melting and deformation processing

[0041] Mix the raw materials described in step (2) evenly in the mixing dev...

Embodiment 2

[0045] According to the method provided by the present invention, a low-cost titanium alloy plate with good impact absorption energy-strength-plasticity matching is prepared, and the specific steps are as follows:

[0046] Step (1) Determine the alloy target composition

[0047] The nominal composition of the designed titanium alloy is: Ti-5.5Al-2.0V-2.0Fe-0.1O. Other impurity elements are less than 0.1% alone and less than 0.4% in total.

[0048] Step (2) Ingredients

[0049] According to the target composition of step (1), according to the ingot weight of 1000kg, the ingredients are 300kg of Ti-6Al-4V or TC4 alloy residue, 637kg of titanium sponge, 12kg of aluminum-50 vanadium master alloy, and 12kg of iron-50 vanadium master alloy. Alloy 4kg, aluminum beans 21kg, titanium dioxide 1.0kg. The residual material is crushed and processed into particles with a diameter not greater than 40mm.

[0050] Step (3) Melting and deformation processing

[0051] Mix the raw materials ...

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Abstract

The invention relates to a preparation method for a titanium alloy with a high dynamic bearing performance and a low cost. The preparation method comprises the following steps: (1) setting the ranges of the target ingredients of the alloy, wherein from composition, the alloy comprises the following elements in percentage by weight: 2.5-7.0% of aluminium, 2.0-5.5% of vanadium, not greater than 2.5% of iron, 0.1-0.3% of oxygen and the balance of titanium; (2) proportioning according to the target ingredients of the alloy; (3) smelting, and deforming and processing; (4) carrying out heat treatment and surface cleaning on the finished product. According to the preparation method disclosed by the invention, the high dynamic bearing capacity of the titanium alloy is guaranteed through reasonable processing and heat treatment regimes; the impact absorption energy is not less than 300J/cm<3>; when the average dynamic flow stress is not less than 1500MPa, the maximum uniform plastic strain is not less than 0.17; when the average dynamic flow stress is not less than 1400MPa, the maximum uniform plastic strain is not less than 0.20; when the average dynamic flow stress is not less than 1300MPa, the maximum uniform plastic strain is not less than 0.22.

Description

technical field [0001] The invention relates to a preparation method of a high dynamic load-bearing performance and low-cost titanium alloy. Specifically, it is a method for recycling titanium alloy residues and obtaining high dynamic performance and low-cost titanium alloy plates or plates through reasonable deformation processing and heat treatment processes. The invention relates to a method for preparing rods, belonging to the field of material preparation. Background technique [0002] Titanium alloy has excellent characteristics such as high strength, low density, good corrosion resistance and high temperature resistance, and is an important structural material in the fields of aviation, aerospace, weapons, chemical industry, and medical treatment. However, the high cost of titanium alloys limits its application range. Studies have shown that in the cost composition of titanium alloys, the cost of sponge titanium accounts for about 40% of the total cost, the cost of a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/03C22C14/00C22F1/18
Inventor 佟学文惠松骁乔璐叶文君张平辉庞洪刘睿冯秋元于洋董燕妮王俭宋晓云
Owner BAOJI TITANIUM IND
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