Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Alpha + beta type two-phase titanium alloy for aero-engine fan blade and preparation method of alpha + beta type two-phase titanium alloy

A technology for aero-engines and fan blades, applied in the field of titanium alloys, can solve problems such as poor superplasticity and difficult diffusion connection control, and achieve the effects of improving tissue uniformity, reducing weight and increasing efficiency, and reducing weight

Active Publication Date: 2021-06-04
AVIC BEIJING AERONAUTICAL MFG TECH RES INST
View PDF7 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The embodiment of the present invention provides an α+β-type two-phase titanium alloy for aeroengine fan blades and a preparation method thereof. Through chemical composition design and microstructure regulation, its plasticity is equivalent to that of Ti-6Al-4V alloy. The tensile strength is greater than 1100MPa, and the method of combining reverse upsetting and high-low forging is adopted to improve the uniformity of the structure and solve the technical problems of poor superplasticity and difficult control of diffusion connection

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
  • Alpha + beta type two-phase titanium alloy for aero-engine fan blade and preparation method of alpha + beta type two-phase titanium alloy
  • Alpha + beta type two-phase titanium alloy for aero-engine fan blade and preparation method of alpha + beta type two-phase titanium alloy
  • Alpha + beta type two-phase titanium alloy for aero-engine fan blade and preparation method of alpha + beta type two-phase titanium alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] An α+β type two-phase titanium alloy for aero-engine fan blades, comprising the following chemical components by mass ratio: 4.2% to 5.6% of aluminum, 7.5% to 8.8% of vanadium, 0.18% to 0.24% of oxygen, and iron≤0.5% , niobium ≤ 1%, silicon 0.4% to 0.8%, carbon ≤ 0.05%, nitrogen ≤ 0.05%, hydrogen ≤ 0.015%, and the rest are titanium and impurity elements.

[0039] A method for preparing an α+β type two-phase titanium alloy for an aeroengine fan blade, comprising the following steps:

[0040] S1, according to the mass ratio to obtain the following chemical composition: aluminum 4.2% ~ 5.6%, vanadium 7.5% ~ 8.8%, oxygen 0.18% ~ 0.24%, iron ≤ 0.5%, niobium ≤ 1%, silicon 0.4% ~ 0.8%, carbon ≤ 0.05%, nitrogen ≤ 0.05%, hydrogen ≤ 0.015%, the rest is titanium and impurity elements;

[0041] S2, the raw materials of each chemical composition are smelted three times by vacuum self-consumption to make titanium alloy ingots, and then measure the β transformation temperature of the...

Embodiment 2

[0057] The difference between this embodiment and Embodiment 1 is that in step S3, the titanium alloy ingot is heated to the range of 30°C to 50°C below the β transformation point, and under the condition of preset deformation amount, after reversing, the The titanium alloy ingot is subjected to five times of upsetting in the second stage, so that the edge and center of the billet of the titanium alloy ingot are deformed evenly. The improvement of step S3 in this embodiment is an alternative to step S3 in embodiment 1. Please refer to figure 2 , the test results show that its tensile strength, yield strength, elongation, reduction of area and elastic modulus are 1137MPa, 1063MPa, 12.3%, 46.9% and 116GPa respectively, and its plasticity and rigidity are comparable to Ti-6Al-4V alloy, And the tensile strength is greater than 1100MPa. The research on the adaptability of blade forming process shows that its superplasticity and diffusion bonding performance also meet the require...

Embodiment 3

[0059] The difference between this example and Example 1 is that in S5, the titanium alloy ingot is heated to the range of 50°C to 80°C below the β transformation point, and the fourth-stage upsetting is performed six times in the α+β two-phase region. , so that the fine and uniform blank structure is completely broken, and the titanium alloy material is obtained. The improvement of step S5 in this embodiment is an alternative to step S5 in embodiment 1. Please refer to image 3 , the test results show that its tensile strength, yield strength, elongation, reduction of area and elastic modulus are 1121MPa, 1033MPa, 13.6%, 44.7% and 112GPa respectively, and its plasticity and rigidity are comparable to Ti-6Al-4V alloy, And the tensile strength is greater than 1100MPa. The research on the adaptability of blade forming process shows that its superplasticity and diffusion bonding performance also meet the requirements of superplastic forming / diffusion bonding process.

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

PropertyMeasurementUnit
Tensile strengthaaaaaaaaaa
Elastic modulusaaaaaaaaaa
Tensile strengthaaaaaaaaaa
Login to View More

Abstract

The invention relates to an alpha + beta type two-phase titanium alloy for an aero-engine fan blade and a preparation method of the alpha + beta type two-phase titanium alloy for the aero-engine fan blade. The preparation method of the alpha + beta type two-phase titanium alloy for the aero-engine fan blade comprises the following steps that S1, the following chemical components are obtained: 4.2%-5.6% of aluminum, 7.5%-8.8% of vanadium, 0.18%-0.24% of oxygen, less than or equal to 0.5% of iron, less than or equal to 1% of niobium, 0.4%-0.8% of silicon, less than or equal to 0.05% of carbon, less than or equal to 0.05% of nitrogen, less than or equal to 0.015% of hydrogen and the balance of titanium and impurity elements; S2, the titanium alloy cast ingot is subjected to first-stage upsetting and drawing; S3, under the conditions of the preset temperature and the preset deformation amount, after reversing is conducted, second-stage upsetting and drawing are conducted on the titanium alloy cast ingot; S4, the titanium alloy cast ingot is heated to the temperature above the phase transformation point, and then the titanium alloy cast ingot is subjected to third-stage upsetting and drawing; S5, the titanium alloy cast ingot is heated to the temperature below the phase transformation point, then fourth-stage upsetting and drawing are conducted on the titanium alloy cast ingot, and a titanium alloy material is obtained; and S6, the titanium alloy material is subjected to heat treatment. The preparation method is applied to the technical field of titanium alloys.

Description

technical field [0001] The invention relates to the technical field of titanium alloys, in particular to an α+β type two-phase titanium alloy for aeroengine fan blades and a preparation method thereof. Background technique [0002] Titanium alloy has become one of the main structural materials of advanced aircraft and engines because of its excellent comprehensive performance matching such as high specific strength, modulus, toughness, high damage tolerance, corrosion resistance and weldability. [0003] Improving the thrust-to-weight ratio and efficiency is the continuous goal of aero-engines, and fan blades are one of the key rotating parts of advanced aero-engines. Since the 1960s and 1970s, aero-engine companies in the United Kingdom, the United States and other Western countries began to develop and use titanium alloy materials and special forming processes to manufacture wide-chord hollow fan blades. After a lot of design, processing and experimental research, it has g...

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
IPC IPC(8): C22C14/00C22C1/02C22F1/18
CPCC22C14/00C22C1/02C22F1/183
Inventor 刘运玺李志强陈玮韩晓宁杜立华周琳
Owner AVIC BEIJING AERONAUTICAL MFG TECH RES INST
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com