A kind of heat-strength damage-tolerant titanium alloy and preparation method thereof

A damage tolerance and titanium alloy technology, applied in the field of alloys, can solve the problems of limiting the application of damage tolerance titanium alloys, and achieve the effects of good thermal processing processability, high room temperature strength, and improved use efficiency

Active Publication Date: 2011-11-30
XIAN SUPERCRYSYAL SCI TECH DEV CO LTD
View PDF1 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The development of thermally strong damage-tolerant titanium alloys used at 350 ° C to 550 ° C is rarely carried out, which limits the application of damage-tolerant titanium alloys in aero-engines

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of heat-strength damage-tolerant titanium alloy and preparation method thereof
  • A kind of heat-strength damage-tolerant titanium alloy and preparation method thereof
  • A kind of heat-strength damage-tolerant titanium alloy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Preparation of 300 kg grade Ti-6.5Al-3.5Mo-2Nb-2Sn-2Zr-0.2Si titanium alloy:

[0032] (1) Ingredients and electrode pressing:

[0033] According to the nominal composition Ti-6.5Al-3.5Mo-2Nb-2Sn-2Zr-0.2Si (ie 6.5% Al; 3.5% Mo; 2% Nb; 2% Sn; 2% Zr; 0.2% Si ; The rest is Ti), select first-grade small particle sponge titanium, Al-Mo master alloy, Ti-Nb master alloy, Ti-Sn master alloy, Ti-Si master alloy, pure metal Zr, mix 300Kg, press with press Form a block electrode with a single weight of 10Kg.

[0034] (2) Electrode preparation:

[0035] Argon shielded plasma welding machine is used to weld the pressed electrode blocks into long strip electrodes.

[0036] (3) Prepare an ingot:

[0037] The electrode prepared in the previous step was used as the consumable electrode to melt in a vacuum consumable electric arc furnace to obtain a primary ingot, the melting current was 5KA, and the melting voltage was controlled at 26V.

[0038] (4) prepare secondary ingot:

[003...

Embodiment 2

[0052] Preparation of 2000 kg grade Ti-6.5Al-3.5Mo-2Nb-2Sn-2Zr-0.2Si titanium alloy:

[0053] (1) Ingredients and electrode pressing:

[0054] According to the nominal composition Ti-6.5Al-3.5Mo-2Nb-2Sn-2Zr-0.2Si, select first-grade small particle sponge titanium, Al-Mo master alloy, Al-Nb master alloy, Ti-Sn master alloy, Ti-Si master alloy Alloy, pure metal Zr, mixing 2000Kg (divided into 20 times), pressed with a press to form a block electrode with a single weight of 50Kg.

[0055] (2) Electrode preparation:

[0056] Argon shielded plasma welding machine is used to weld the pressed electrode blocks into long strip electrodes.

[0057] (3) Prepare an ingot:

[0058] Use the electrode prepared in the previous step as the consumable electrode to melt in a vacuum consumable electric arc furnace to obtain a primary ingot, the melting current is 6KA, and the melting voltage is controlled at 35V.

[0059] (4) prepare secondary ingot:

[0060] The primary ingot was inverted a...

Embodiment 3

[0073] In this embodiment, the mass percentage composition of the heat-strength damage-tolerant titanium alloy is as follows:

[0074] 5.8% Al; 2.8% Mo; 1.6% Nb; 1.6% Sn; 1.6% Zr; 0.15% Si; the rest is Ti.

[0075] 1) Mix the materials according to the content of the components, and use a press and a mold to press into an electrode block.

[0076] 2) Use vacuum plasma welding, argon shielded plasma welding or vacuum electron beam welding to quickly assemble and weld the electrodes pressed in step 1) into strip electrodes.

[0077] 3) Using the strip-shaped electrode prepared in step 2) as a consumable electrode to smelt in a vacuum consumable electric arc furnace to obtain a primary ingot; the smelting current is 5KA, and the smelting voltage is controlled at 26V.

[0078] 4) Invert the primary ingot and use it as a consumable electrode for secondary melting in a vacuum consumable electric arc furnace to obtain a secondary ingot; the melting current is 6KA, and the melting vo...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a heat-strength damage-tolerant titanium alloy and a preparation method thereof. According to the mass percentage, the alloy contains the following components: 5.8-7.2% Al; 2.8-3.8% Mo; 1.6-2.5% Nb; 1.6% -2.5Sn; 1.6-2.5% Zr; 0.15-0.25% Si; the rest is Ti. The alloy preparation method includes: batching and electrode pressing, electrode preparation, preparation of primary ingot, preparation of secondary ingot, preparation of casting ingot, and finally the casting ingot is required to be cooled to below 200°C after smelting is completed. The high-temperature strength and fracture toughness of the parts produced by the titanium alloy obtained by the preparation method of the present invention are significantly higher than those of the currently used TC11 heat-strength titanium alloy at 350° C. to 550° C. TC11 heat-strength titanium alloy is in an order of magnitude, and has higher room temperature strength and better hot-working processability. These properties broaden the application range of the titanium alloy and its parts in aero-engines, improve the use efficiency, reduce the cost, and have good application prospects.

Description

technical field [0001] The invention belongs to the technical field of alloys, and relates to a titanium alloy, in particular to a heat-strength damage-tolerant titanium alloy and a preparation method thereof. Background technique [0002] As a light metal alloy material, titanium alloy has a series of advantages such as high specific strength, high specific modulus, high toughness, and corrosion resistance. It is widely used in the production and manufacture of aircraft body structural parts and aeroengines. With the development of design technology, the demand for high-performance titanium alloy is also increasing. The amount of titanium alloy used in aerospace vehicles has become one of the important symbols to measure its advanced level. [0003] In the Korean War in the 1950s, nearly 1,000 U.S. aircraft were shot down on the battlefield and nearly 1,000 were injured. In the Vietnam War in the 1960s, the losses of U.S. aircraft were even more severe, with a total of more...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): C22C14/00C22C1/02
Inventor 张利军周中波白钰刘娣王幸运田军强朱鹏超薛祥义常辉
Owner XIAN SUPERCRYSYAL SCI TECH DEV CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap