Composition design and multi-directional forging process of a high-temperature titanium alloy
A high-temperature titanium alloy and alloy technology, applied in the field of titanium alloys, can solve problems such as poor elongation and low tensile strength
Active Publication Date: 2018-08-14
BEIJING UNIV OF TECH
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Problems solved by technology
[0003] In order to solve the problems of low tensile strength and poor elongation of high-temperature titanium alloys prepared by existing methods at a high temperature of 650°C, the present invention proposes a design and forging method for high-temperature titanium alloys
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Embodiment 1
[0018] A high-temperature titanium alloy is composed of 7% Al, 2.5% Sn, 6% Zr, 0.5% Mo, 1% W, 1% Nb, 0.25% Si, 0.1% Er and the rest of Ti in terms of element mass percentage. The preparation of the high-temperature titanium alloy of the present embodiment is carried out according to the following steps:
[0019] 1. Weigh the components: Weigh the raw materials: 7% Al, 2.5% Sn, 6% Zr, 0.5% Mo, 1% W, 1% Nb, 0.25% Si, 0.1% Er and the rest It is made of a certain amount of Ti, respectively weighing high-purity aluminum ingot, high-purity tin powder, high-purity zirconium sponge, Al-Mo master alloy, Al-Nb master alloy, high-purity silicon, Al-W master alloy, Al-Er alloy, sponge titanium. Al element comes from aluminum master alloy and high-purity aluminum. The purity of high-purity aluminum ingots, high-purity tin powder, high-purity zirconium sponge, and high-purity silicon is not less than 99.9%.
[0020] 2. Melting:
[0021] The raw material weighed in step 1 is pressed into...
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Abstract
The invention relates to a novel high-temperature titanium alloy composition design and a multi-directional forging process and belongs to the technical field of titanium alloys. According to the novel high-temperature titanium alloy composition design and the multi-directional forging process, the problem that the titanium alloy is poor in tensile strength and elongation rate at the temperature of 650 DEG C is solved. A high-temperature titanium alloy is prepared, by mass, from 6.5%-7.5% of Al, 2%-3% of Sn, 6%-9% of Zr, 0.2%-1% of Mo, 0.5%-1.4% of W, 0.5%-1.5% of Nb, 0.2%-0.3% of Si, 0.1%-0.3% of Er and the balance Ti. The forging process of the high-temperature titanium alloy is multi-directional die forging. According to a high-temperature titanium alloy forging blank manufactured by the invention, at the temperature of 650 DEG C, the tensile strength is 615 MPa, and the elongation rate is 47%.
Description
technical field [0001] The invention belongs to the technical field of titanium alloys, and relates to a novel high-temperature titanium alloy composition design and multi-directional forging process. technical background [0002] High-temperature titanium alloy has the characteristics of low density, high specific strength, high temperature resistance, excellent creep resistance and fatigue resistance, and is widely used in high-temperature resistant structural materials for advanced aerospace engines and rocket propulsion systems. At present, the maximum service temperature of high-temperature titanium alloy is 600°C. With the increase of the flight speed of new aerospace vehicles, the service temperature of the aircraft shell and its engine components caused by the thermal effect of the gas can reach 650-750°C or even higher in an instant. The rapid development of aerospace requires the development of new titanium alloys resistant to high temperatures above 650 °C. At pr...
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IPC IPC(8): C22C14/00C22C1/03B21J5/02B21J1/06
CPCB21J1/06B21J5/002B21J5/02C22C1/03C22C14/00
Inventor 陈子勇石少辉柴丽华李涛李丹丹冯宗悦靳艳芳
Owner BEIJING UNIV OF TECH