CN101899590A

CN101899590A - Titanium-aluminum-iron alloy

Info

Publication number: CN101899590A
Application number: CN 201010241013
Authority: CN
Inventors: 侯瑞政; 李枫; 周靖宇
Original assignee: JIANGSU JIAZHE TI-ALLOY MATERIAL TECHNOLOGY Co Ltd
Current assignee: JIANGSU JIAZHE TI-ALLOY MATERIAL TECHNOLOGY Co Ltd
Priority date: 2010-07-29
Filing date: 2010-07-29
Publication date: 2010-12-01

Abstract

The invention discloses a titanium-aluminum-iron alloy. The titanium-aluminum-iron alloy is characterized by consisting of the following components in percentage by weight: 91 to 96 percent of Ti, 3 to 6 percent of Al, 0.6 to 2 percent of Fe, 0.1 to 0.3 percent of O, 0.01 to 0.06 percent of N, 0.01 to 0.015 percent of H and 0.01 to 0.05 percent of C. In the invention, because the alloy comprises Al, the thermal processing performance is between that of ASTM pure titanium and that of Ti-6Al-4V, namely the thermal deformation resistance is greater than that of the Gr4 pure titanium and less than that of Ti-6Al-4V and the fatigue strength is higher than that of Ti-6Al-4V. Thus the Ti-Al-Fe alloy has the advantages of superior thermal processing performance to the conventional high-strength titanium alloys, tensile strength of 1,000MPa which is equivalent to that of Ti-6Al-4V, superplasticity, wide temperature range for superplastic deformation and easy molding.

Description

A kind of titanium ferroaluminium

Technical field

The present invention relates to low-cost and high-performance titanium alloy material field, especially make the titanium alloy of automobile component with low-cost and high-performance about a kind of being mainly used in.

Background technology

The metal titanium excellent characteristic mainly is meant high strength, low density, outstanding solidity to corrosion, and the isostructural steel of homophase are compared, and titanium alloy material generally can alleviate component weight about 50%.Document announcement is arranged, if car mass reduces by 10%, fuel efficiency can improve 6%～8%.This shows, follow lightweight and the outstanding advantage of coming is the remarkable reduction of oil consumption, also will reduce the emission of automobile wastes amount, reach the purpose of energy-saving and environmental protection.

When titanium alloy uses as the trolley part material, half that is characterized in that tensile strength and yield strength are big, fatigue strength is big, density is little, Young's modulus is steel approximately, thermal expansivity are low, be approximately stainless steel and aluminium half, non magnetic, thermal conductivity is low, be easy to generate sintering, environmentally safe etc.After automobile industry is with titanium, can greatly alleviate vehicle weight, reduce its fuel consumption, reduce the noise and the vibration of engine, protection environment and reduction noise.Utilize titanium alloy to make auto parts machinery, but not only weight reduction save fuel oil, and power transmission is effective, helps good dynamic performance, operational stability.The reliability height increases the service life.The automobile titanium is a very huge market, and according to design and material behavior, titanium mainly is distributed on engine components and the vehicle chassis component in the application on the automobile.Can make elements such as valve, valve spring, valve spring bearing and connecting rod in engine system with titanium, the improvement of performance shows the minimizing of changeing distance, output rating and interconnecting piece distortion.Titanium purposes beyond the engine: be mainly spring, exhaust system, semiaxis, middle suspension spring, gas barrier with titanium at vehicle chassis component, bent axle and other fastening piece class are to the use of titanium, available titanium is made valve class, coupling shaft, valve spring and its bearing tool in the trolley part, and these all are the key parts on the automobile.Therefore it is extremely urgent to research and develop titanium alloy.

Summary of the invention

At above problem, the object of the present invention is to provide a kind of titanium ferroaluminium, be the β element V that in known alloy, does not use high price, adopt cheap Fe, adapt to the application of low-cost and high-performance Ti-Al-Fe alloy material in temperature changing process.

Technical scheme of the present invention realizes in the following manner: a kind of titanium ferroaluminium, represent with weight percent, it is characterized in that: form: Ti 91-96%, Al 3-6%, Fe 0.6-2%, O 0.1-0.3%, N 0.01-0.06%, H 0.01-0.015%, C0.01-0.05% by following composition.

The present invention, because of containing Al in the alloy ingredient, hot workability is in the middle of pure titanium of ASTM and the Ti-6Al-4V, and the instant heating resistance to deformation is bigger than the pure titanium of Gr4, and littler than Ti-6Al-4V, fatigue strength is higher than Ti-6Al-4V.Therefore the Ti-Al-Fe alloy has than the better hot workability of high strength titanium alloy in the past, and its tensile strength reaches 1000MPa, and is suitable with Ti-6Al-4V, have superly to mould behavior, and the temperature range of superplastic deformation is very wide, is easy to forming process.

Embodiment

Embodiment 1:

A kind of Ti-5Al-1Fe titanium ferroaluminium is represented with weight percent, is made up of following composition: Ti 93.875%, Al 5%, Fe 1%, O 0.2%, N 0.04%, H 0.015%, C 0.05%.

Embodiment 2:

A kind of Ti-3.5Al-1Fe titanium ferroaluminium is represented with weight percent, is made up of following composition: Ti 95.3%, Al 3.5%, Fe 1%, O 0.16%, N 0.02%, H 0.01%, C 0.01%.

Embodiment 3:

A kind of Ti-5.5Al-1Fe titanium ferroaluminium is represented with weight percent, is made up of following composition: Ti 92.65%, Al 5.5%, Fe 1%, O 0.3%, N 0.5%, H 0.013%, C 0.037%.

Test shows: the hot relative reduction in area of Ti-3.5Al-1Fe is suitable with the pure titanium of Gr4; Ti-5Al-1Fe, its tensile strength reaches 1000MPa, and it is suitable with Ti-6Al-4V that intensity exceeds the about 200MPa. of pure titanium material, the Ti-Al-Fe alloy is because of containing Al, hot workability is in the middle of pure titanium of ASTM and the Ti-6Al-4V, and the instant heating resistance to deformation is bigger than the pure titanium of Gr4, and is littler than Ti-6Al-4V.The hot relative reduction in area of Ti-5.5Al-1Fe is than Ti-6Al-4V height, so the Ti-Al-Fe alloy has than the better hot workability of high strength titanium alloy in the past.Fatigue strength is higher than Ti-6Al-4V.Superplasticity; Ti-Al-Fe such as has at the axle microscopic structure, and is the same with general alpha+beta titanium alloys, and the temperature range of superplastic deformation is very wide, is easy to forming process.The present invention is mainly used in the low-cost and high-performance Ti-Al-Fe alloy material of automobile and motorcycle, from the melting of titanium ingot to forging, the processing and the industrialization of rod, silk coiled material.

Performance index are as follows:

Claims

1. a titanium ferroaluminium is represented with weight percent, it is characterized in that: be made up of following composition: Ti 91-96%, Al 3-6%, Fe 0.6-2%, O 0.1-0.3%, N 0.01-0.06%, H 0.01-0.015%, C 0.01-0.05%.

2. a kind of titanium ferroaluminium according to claim 1, it is characterized in that: described composition is made up of following: Ti 93.875%, Al 5%, Fe 1%, O 0.2%, N 0.04%, H 0.015%, C 0.05%.

3. a kind of titanium ferroaluminium according to claim 1, it is characterized in that: described composition is made up of following: Ti 95.3%, Al 3.5%, Fe 1%, O 0.16%, N 0.02%, H 0.01%, C 0.01%.

4. a kind of titanium ferroaluminium according to claim 1, it is characterized in that: described composition is made up of following: Ti 92.65%, Al 5.5%, Fe 1%, O 0.3%, N 0.5%, H 0.013%, C 0.037%.