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Titanium alloy with strength greater than 1400MPa

A titanium alloy, high strength technology, applied in the field of titanium alloy, can solve the problems of limited popularization and application, low plasticity and toughness, etc., and achieve significant economic benefits, not easy to crack, and easy to form

Inactive Publication Date: 2015-04-08
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The strength of the TB20 ultra-high-strength titanium alloy explored and researched in my country can also reach more than 1350MPa, but it can only be used in small-sized semi-finished products such as wire fasteners. When used to manufacture large-thickness forgings, the plasticity and toughness are low, and the fracture toughness only left and right, thus limiting its further promotion and application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The weight percent composition of titanium alloy is: molybdenum: 12%, iron: 5%, aluminum: 3%, carbon: 0.02%, nitrogen: 0.007%, hydrogen: 0.008%, oxygen: 0.062%, and the balance is titanium

[0024] The steps of preparation are as follows:

[0025] 1. Electrode preparation: use sponge titanium, industrial pure aluminum, Al-Mo master alloy and Fe-Mo master alloy as raw materials, and mix the materials according to the following weight percentages: molybdenum: 12%, iron: 5%, aluminum: 3%, The balance is titanium, and after mixing, use a press to press into a consumable electrode;

[0026] 2. The first vacuum consumable electric arc furnace smelting: put the consumable electrode into the vacuum consumable electric arc furnace for smelting, the melting temperature is 1850℃~2050℃, and obtain an ingot in the crystallizer;

[0027] 3. The second vacuum consumable electric arc furnace smelting: the first ingot is used as the consumable electrode for the second vacuum consumable...

Embodiment 2

[0034] The weight percent composition of the titanium alloy is: molybdenum: 9%, iron: 8%, aluminum: 5%, carbon: 0.01%, nitrogen: 0.005%, hydrogen: 0.0017%, oxygen: 0.074%, and the balance is titanium.

[0035] The steps of preparation are as follows:

[0036] 1. Electrode preparation: use sponge titanium, industrial pure aluminum, pure iron wire, and Fe-Mo master alloy as raw materials, and mix the materials according to the following weight percentages: molybdenum: 9%, iron: 8%, aluminum: 5%, and the balance is Titanium, after mixing, is pressed into a consumable electrode by a press;

[0037] 2. The first vacuum consumable electric arc furnace smelting: put the consumable electrode into the vacuum consumable electric arc furnace for smelting, the melting temperature is 1850℃~2050℃, and obtain an ingot in the crystallizer;

[0038] 3. The second vacuum consumable electric arc furnace smelting: the first ingot is used as the consumable electrode for the second vacuum consumab...

Embodiment 3

[0045] The weight percent composition of the titanium alloy is: molybdenum: 15%, iron: 4%, aluminum: 1%, carbon: 0.03%, nitrogen: 0.008%, hydrogen: 0.008%, oxygen: 0.082%, and the balance is titanium.

[0046] The steps of preparation are as follows:

[0047]1. Electrode preparation: use sponge titanium, Al-Mo master alloy, Fe-Mo master alloy, and Ti-Mo master alloy as raw materials, and mix the materials according to the following weight percentages: molybdenum: 15%, iron: 4%, aluminum: 1 %, the balance is titanium, after mixing, use a press to press into a consumable electrode;

[0048] 2. The first vacuum consumable electric arc furnace smelting: put the consumable electrode into the vacuum consumable electric arc furnace for smelting, the melting temperature is 1850℃~2050℃, and obtain an ingot in the crystallizer;

[0049] 3. The second vacuum consumable electric arc furnace smelting: the first ingot is used as the consumable electrode for the second vacuum consumable ele...

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Abstract

The invention belongs to the field of metal material technology, and relates to a titanium alloy with strength greater than 1400MPa. The titanium alloy provided by the invention consists of the following components by weight percentage: 9%-15% of molybdenum, 4%-8% of iron, 1%-5% of aluminum, no more than 0.08% of carbon, no more than 0.05% of nitrogen, no more than 0.015% of hydrogen, no more than 0.15% of oxygen and the balance of titanium. The titanium alloy of the invention has outstanding strength performance, tensile strength more than 1400 MPa, and good coupling of the strength-plasticity-toughness. The titanium alloy is not easy to crack during the forging process, easy for forming and low in processing cost, can be used as a key bearing component in aviation, also can be widely popularized and used in the fields of aerospace, weapons and other civilian usage, and has significant economic benefits.

Description

technical field [0001] The invention belongs to metal material technology and relates to a titanium alloy with a strength greater than 1400MPa. Background technique [0002] With the rapid development of a new generation of weapons and equipment such as hypersonic vehicles, unmanned fighter jets, high-stealth and highly maneuverable aircraft, strategic bombers, variant aircraft and new concept weapons, ultra-high-strength titanium alloy materials have been developed to achieve higher strength, Excellent comprehensive performance requirements such as high toughness, damage tolerance, high fatigue performance, low cost, and weldability are urgently needed to meet the design and use goals of lightweight and long-life of the new generation of weapons and equipment. [0003] At present, the main reason for limiting the performance potential of ultra-high-strength titanium alloys and their application in new-generation weapons and equipment is that with the continuous improvement ...

Claims

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Application Information

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IPC IPC(8): C22C14/00
Inventor 王新南朱知寿商国强费跃李静祝力伟
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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