High temperature titanium alloy plate as well as preparation method and application thereof

A high-temperature titanium alloy and titanium alloy technology, which is applied in metal rolling, metal rolling, metal processing equipment, etc., can solve the problems that the creep performance of the blade has little effect, the alloy has low potential for high-temperature performance, and is difficult to meet

Active Publication Date: 2020-09-11
WESTERN METAL MATERIAL
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Problems solved by technology

Although the processing method of the blade is to forge the hot-rolled bar in the radial direction, the texture formed by the radial deformation is conducive to improving the creep performance of the blade, but it only slightly deforms the radial direction of the bar , so it has little effect on improving the creep performance of the blade. At this stage, the contradiction between the high-temperature creep performance and thermal stability of high-temperature titanium alloys is difficult to coordinate. The establishment of the Al-Sn-Zr-Mo-Si alloy system has reached the limit. From From the perspective of alloying, the potential to greatly improve the high-temperature performance of the alloy is very small, and it is difficult to meet the stringent requirements for high-temperature titanium alloys put forward by the rapid development of my country's aviation and aerospace industries.

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  • High temperature titanium alloy plate as well as preparation method and application thereof
  • High temperature titanium alloy plate as well as preparation method and application thereof
  • High temperature titanium alloy plate as well as preparation method and application thereof

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preparation example Construction

[0025] The invention provides a method for preparing a high-temperature titanium alloy plate, comprising the following steps:

[0026] (1) performing the first heat treatment and the first rolling on the titanium alloy slab in turn to obtain the first semi-finished slab; the first rolling is unidirectional rolling;

[0027] (2) cutting the first semi-finished slab described in step (1) to obtain a second semi-finished slab;

[0028] (3) performing the second heat treatment and the second rolling on the second semi-finished slab described in step (2) successively to obtain the third semi-finished slab; the second rolling is unidirectional rolling;

[0029] (4) Heat-treating the third semi-finished slab described in step (3) to obtain a high-temperature titanium alloy plate.

[0030] In the invention, the titanium alloy slab is subjected to the first heat treatment and the first rolling in order to obtain the first semi-finished slab. In the present invention, the titanium all...

Embodiment 1

[0043] (1) The forged 240mm×1000mm×1200mm, TC11 titanium alloy slab (phase transition point is 1000°C) is subjected to the first heat treatment at 990°C, kept for 210min, and then sent to the hot rolling mill for the first rolling , to obtain the first semi-finished slab of 80mm * 1000mm * 3600mm, the first rolling is unidirectional rolling; the total deformation of the first rolling is 67%;

[0044] (2) grinding and pickling the first semi-finished slab obtained in step (1) successively, and then cutting along the length direction to obtain a second semi-finished slab of 80mm×1000mm×1200mm;

[0045] (3) The second semi-finished slab obtained in step (2) is subjected to a second heat treatment at 990° C., kept for 100 minutes, and then sent to a hot rolling mill for a second rolling to obtain a plate with a size of 40 mm × 1000 mm × 2400 mm , after the rolling is completed, the plate is quickly transported back to the heating furnace, and the heat treatment is carried out at 9...

Embodiment 2

[0053] (1) The forged 120mm×800mm×1050mm, Ti6242S titanium alloy slab (phase transition point is 1015°C) is subjected to the first heat treatment at 995°C, kept for 150min, and then sent to the hot rolling mill for the first rolling , to obtain the first semi-finished slab of 48mm * 800mm * 2625mm, the first rolling is unidirectional rolling; the total deformation of the first rolling is 60%;

[0054] (2) grinding and pickling the first semi-finished slab obtained in step (1) successively, and then cutting to obtain a second semi-finished slab of 48mm × 800mm × 1310mm;

[0055] (3) The second semi-finished slab obtained in step (2) is subjected to a second heat treatment at 995° C., kept for 68 minutes, and then sent to a hot rolling mill for a second rolling to obtain a slab with a size of 19.2 mm × 800 mm × 3275 mm. After the rolling, the plate is quickly transported back to the heating furnace, heat-treated at 995°C for 29 minutes, and then quickly transported to the rapid ...

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Abstract

The invention relates to the technical field of titanium alloy material preparation, in particular to a high temperature titanium alloy plate as well as a preparation method and application thereof. The preparation method of the high temperature titanium alloy plate comprises the following steps: 1, carrying out first-time heating treatment and first-time rolling sequentially on a titanium alloy plate billet to obtain a first semi-finished plate billet, wherein the first-time rolling is one-way rolling; 2, cutting the first semi-finished plate billet obtained in the step 1 to obtain a second semi-finished plate billet; 3, carrying out second-time heating treatment and second-time rolling sequentially on the second semi-finished plate billet obtained in the step 2 to obtain a third semi-finished plate billet, wherein the second-time rolling is one-way rolling; and 4, carrying out thermal treatment on the third semi-finished plate billet obtained in the step 3 to obtain the high temperature titanium alloy plate. With adoption of the preparation method, the forging blank product form for a high temperature titanium blade is changed, the plate replaces a traditional bar, and the high temperature titanium alloy plate has higher room temperature mechanical property, high temperature mechanical property and endurance property.

Description

technical field [0001] The invention relates to the technical field of titanium alloy material preparation, in particular to a high-temperature titanium alloy plate and its preparation method and application. Background technique [0002] In recent years, with the development of the aerospace industry, high thrust-to-weight ratio is the development trend of aero-engines, and the development of high-thrust-to-weight ratio aero-engines is closely related to the extensive application of high-temperature titanium alloys. High-temperature titanium alloys are mainly near-α-type titanium alloys. This type of alloy has good creep, durability and welding performance, and is suitable for use in high-temperature environments. It has been used to manufacture aircraft engine blades, blisks, drums, etc. kinds of parts. The blade is a key part of an aero-engine, and the main reasons for its failure are damage caused by creep and high-low cycle fatigue. Therefore, improving the creep perfo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B1/38B21B3/00B21B15/00C22F1/18
CPCB21B1/38B21B3/00B21B15/0007C22F1/183
Inventor 葛鹏王瑞琴廖强侯鹏刘宇席锦会
Owner WESTERN METAL MATERIAL
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