US2819959A - Titanium base vanadium-iron-aluminum alloys - Google Patents

Titanium base vanadium-iron-aluminum alloys Download PDF

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Publication number
US2819959A
US2819959A US592260A US59226056A US2819959A US 2819959 A US2819959 A US 2819959A US 592260 A US592260 A US 592260A US 59226056 A US59226056 A US 59226056A US 2819959 A US2819959 A US 2819959A
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titanium
iron
alloy
vanadium
alloys
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Abkowitz Stanley
Paul E Moorhead
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RMI Co
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RMI Co
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    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C14/00Alloys based on titanium

Description

TITANIUM BASE VANADIUM-IRON-ALUMINUM ALLOYS Stanley Abkowitz and Paul E. Moorhead, Warren, Ohio, assignors to Mallory-Sharon Titanium Corporation, Niles, Ohio, a corporation of Delaware No Drawing. Application June 19, 1956 Serial No. 592,260

7 Claims. (Cl. 75175.5)

The invention relates to titanium base alloys and more particularly to quaternary titanium base alloys containing vanadium, iron and aluminum. More particularly, the invention relates to a titanium base alloy adapted for rolling into sheet material with good ductility and formability accompanied by high strength in the as-annealed condition.

Finally, the invention relates specifically to a titanium base alloy having at least a 130,000 p. s. i. minimum yield strength as annealed, with good tensile and bend ductility.

Normally an increase in strength of titanium can be obtained by the addition of a strengthener. Iron may be used as a strengthener but it is a strong compound former. Vanadium may be used to retard the formation of the titanium-iron compound. However, vanadium is an expensive alloying element. Nevertheless, vanadium can be obtained at a much lower cost in the form of a master alloy with aluminum. This creates further problems because while aluminum like iron is a strengthener aluminum accelerates the formation of the titanium-iron compound with resulting embrittlement.

We have discovered however, that certain quaternary alloys of vanadium, iron and aluminum can be made with a minimum yield strength as-annealed of as high as 130,000 p. s. i., and with tensile and bend ductility properties comparable to those in other titanium alloys now used which only have a 110,000 p. s. i. minimum yield strength in the as-annealed condition.

One outstanding characteristic of the improved V-Fe-Al titanium alloy of the present invention is that there is no apparent embrittlement resulting from compound formation following heat treatment or heating of any kind.

A further unusual characteristic of the improved alloy of the present invention is the ease with which it may be melted as compared with the melting problems involved in the manufacture of a manganese titanium binary alloy which has comparable ductility, but with which the problem of segregation in melting is ever present.

The improved alloy, in addition to having good tensile and bend ductility in the as-annealed condition with a high minimum yield strength, has excellent formability. Heretofore it has been difficult to obtain such a combination of properties in titanium alloy material.

Accordingly, it is an object of the present invention to provide a new quaternary titanium sheet alloy characterized by a desirable combination of favorable properties including good formability, good tensile and bend ductility in the as-annealed condition, and a 130,000 p. s. i. minimum yield strength as annealed.

Furthermore, it is an object of the present invention to provide a new quaternary titanium sheet alloy in which no apparent embrittlement occurs resulting from compound formation following heat treatment, even though the alloy contains iron and aluminum as strengtheners.

Also it is an object of the present invention to provide a new quaternary titanium alloy which is relatively easy States atent O "ice to produce without segregation during melting, and which has high strength and good ductility and formability in the as-annealed condition.

In addition, it is an object of the present invention to provide a new quaternary titanium sheet alloy which is lighter in weight or has a lower density than other titanium alloys presently used which have less favorable properties from the standpoint of minimum yield strength, as-annealed, but which other alloys may have comparable tensile and bend ductility properties.

Finally, it is an object of the present invention to provide a new quaternary titanium base sheet alloy containing about 8% vanadium, 3% to 5% iron and 1.5% aluminum.

These and other objects and advantages apparent to those skilled in the art from the following description and claims may be obtained, the stated results achieved, and the described difficulties overcome by the discoveries, principles, compositions and alloys which comprise the present invention, the nature of which is set forth belowillustrative of the best modes in which applicants have contemplated applying the principlesand which are particularly and distinctly pointed out and set forth in the appended claims forming part hereof.

The alloys of the present invention may be prepared from either commercial titanium or high purity titanium. Where prepared from commercial titanium, a typical analysis of the material, in addition to titanium, vanadium, iron and aluminum, is 0.02% C, 0.01% N 0.10% 0 and 0.005% H However, the invention is not restricted to the use of material having the typical interstitial level indicated, as the level may be of the order of 0.06% C, 0.03% N 0.15% 0 and 0.020% to 0.024% H In other words, presently available sponge having a sponge hardness of 120 BHN is suitable. The sponge hardness may, however, range from, BHN to 150 BHN. In examples given below, titanium sponge having a typical interstitial level of BHN was used.

In practice, the titanium is preferably melted by the electric arc process in a water-cooled copper crucible in an atmosphere such as argon, and the alloying elements are added :to the melt either separately or in alloy combinations of vanadium and aluminum, vanadium and iron, or vanadium, iron and aluminum.

In general, the alloys of the present invention comprise about 8% vanadium, from 3% to 5% iron, and 1.5 aluminum, the balance being titanium. More particularly, the preferred alloys of the present invention may have the analyses given in Table I below.

The alloys of the present invention after melting and casting may be processed in the usual manner and forged or rolled to form the desired semi-finished or finished product. For instance, ingots of the improved quaternary alloys may be forged or bloomed to slab form, hot rolled to sheet bar, and the sheet bar may be hot rolled to form finished sheets, say, .020" to .090" thick.

Several examples of the improved alloy of the present invention are as follows:

Table I Nominal or Intended Compositicn Heat Example No.

Percent Percent V Fe Percent Percent Al Ti 8 Ba]. DM 455 8 3 1. 5 5 1. 5 Bal.

The mechanical properties of sheet fabricated from alloys of the present invention as determined by evaluation. are indicated in Table II below:

The alloys of the present invention are characterized by their good ductility with a minimum as-annealed yield strength of 122,200 p. s. i. and higher with larger amounts of iron, and with freedom from embrittlement resulting from compound formation following heating or heat treatment.

The improved alloy likewise has arelatively low density of about 0.169 pound per cubic inch for the alloy of Example 2 which compares favorably with a higher 0.172 density for the 8% binary manganese alloy which has a lower minimum yield strength in the as-anncaled condition and which is more difficult to make because of the segregation problem in melting.

Although the alloys of the present invention have been described particularly as sheet alloys, the use of the same is not limited to the manufacture of sheet material as the desirable properties can be availed of in. other kinds of semi-finished or finished titanium alloy products, such as bars.

It is to be understood that in the foregoing tables, Where intended composition is indicated, there may be some variation in actual composition determined by chemical analyses. Compositions usually are close to the nominal or intended composition but may vary slightly either way from the intended values, depending upon the ability to control the exact amount of alloying additions made.

The sheet alloys of the present invention accordingly provide quaternary titanium alloys which are relatively easy to make, which may have a 130,000 p. s. i. minimum yield strength or higher, as annealed, with good tensile and bend ductility, which have good forming characteristics, which have relatively low density, and which have a combination of the indicated properties heretofore not obtained in any known prior titanium alloy.

In the foregoing description certain terms have been used for brevity, clearness and understanding, but no unnecessary limitations are to be implied therefrom beroad the requirements of the prior art, because such terms are used for descriptive purposes herein and are intended to be broadly construed.

Having now described the invention, the features, discoveries and principles thereof, the characteristics of the new alloys, several examples of preferred embodiments of the new alloys, and the new and useful results obtained; the new and useful compositions, combinations, products, discoveries and principles, and reasonable mechanical equivalents thereof obvious to those skilled in the art are set forth in the appended claims.

We claim:

1. A titanium base alloy consisting of 8% vanadium, 3% to 5% iron, 1.5% aluminum, and the balance titanium with incidental impurities.

2. A titanium base alloy consisting of 8% vanadium, 3% iron, 1.5% aluminum, and the balance titanium with incidental impurities.

3. A titanium base alloy consisting of 8% vanadium, 5% iron, 1.5 aluminum, and the balance titanium with incidental impurities.

4. A titanium base sheet alloy consisting of 8% vanadium, 3% to 5% iron, 1.5% aluminum, the balance titanium with incidental impurities; said alloy having asannealed a minimum yield strength of 122,200 p. s. i. and elongation in excess of 12%.

5. A titanium base sheet alloy consisting of 8% vanadium, 3% to 5% iron, 1.5% aluminum, the balance titanium with incidental impurities; said alloy having asannealed at minimum yield strength of 122,200 p. s. i. and being free from embrittlement resulting from compound formation following heat treatment.

6. A titanium base sheet alloy consisting of 8% vanadium, 3% iron, 1.5% aluminum, and the balance titanium with incidental impurities; said alloy having asannealed a minimum yield strength of 122,200 p. s. i. and elongation of 12.9%.

7. A titanium base sheet alloy consisting of 8% vanadium, 5% iron, 1.5% aluminum, and the balance titanium with incidental impurities; said alloy having asannealed a minimum yield strength of 137,800 p. s. i. and elongation of 12.1%.

References Cited in the file of this patent UNITED STATES PATENTS Re. 24,013 Jaife et al. May 31, 1955 2,739,887 Brittain et al. Mar. 27, 1956 2,754,203 Vordahl July 10, 1956 2,758,922 Dickinson et al. Aug. 14, 1956

Claims (1)

1. A TITANIUM BASE ALLOY CONSISTING OF 8% VANADIUM, 3% TO 5% IRON, 1.5% ALUMINUM, AND THE BALANCE TITANIUM WITH INCIDENTAL IMPURITIES.
US592260A 1956-06-19 1956-06-19 Titanium base vanadium-iron-aluminum alloys Expired - Lifetime US2819959A (en)

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Cited By (43)

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DE1160635B (en) * 1958-02-28 1964-01-02 Nat Distillers Chem Corp Titanium alloy having a low hydrogen content and methods for the same remuneration
DE1161435B (en) * 1958-09-25 1964-01-16 Nat Distillers Chem Corp Heat treatable Ti-Al-V-Fe alloy of high ductility and high strength
US3436277A (en) * 1966-07-08 1969-04-01 Reactive Metals Inc Method of processing metastable beta titanium alloy
US5311655A (en) * 1990-10-05 1994-05-17 Bohler Edelstahl Gmbh Method of manufacturing titanium-aluminum base alloys
US20050211475A1 (en) * 2004-04-28 2005-09-29 Mirchandani Prakash K Earth-boring bits
US20060024140A1 (en) * 2004-07-30 2006-02-02 Wolff Edward C Removable tap chasers and tap systems including the same
US20060131081A1 (en) * 2004-12-16 2006-06-22 Tdy Industries, Inc. Cemented carbide inserts for earth-boring bits
US20060288820A1 (en) * 2005-06-27 2006-12-28 Mirchandani Prakash K Composite article with coolant channels and tool fabrication method
US20070056776A1 (en) * 2005-09-09 2007-03-15 Overstreet James L Abrasive wear-resistant materials, drill bits and drilling tools including abrasive wear-resistant materials, methods for applying abrasive wear-resistant materials to drill bits and drilling tools, and methods for securing cutting elements to a drill bit
US20070056777A1 (en) * 2005-09-09 2007-03-15 Overstreet James L Composite materials including nickel-based matrix materials and hard particles, tools including such materials, and methods of using such materials
US20070102199A1 (en) * 2005-11-10 2007-05-10 Smith Redd H Earth-boring rotary drill bits and methods of manufacturing earth-boring rotary drill bits having particle-matrix composite bit bodies
US20070102198A1 (en) * 2005-11-10 2007-05-10 Oxford James A Earth-boring rotary drill bits and methods of forming earth-boring rotary drill bits
US20070102200A1 (en) * 2005-11-10 2007-05-10 Heeman Choe Earth-boring rotary drill bits including bit bodies having boron carbide particles in aluminum or aluminum-based alloy matrix materials, and methods for forming such bits
US20070251732A1 (en) * 2006-04-27 2007-11-01 Tdy Industries, Inc. Modular Fixed Cutter Earth-Boring Bits, Modular Fixed Cutter Earth-Boring Bit Bodies, and Related Methods
US20080073125A1 (en) * 2005-09-09 2008-03-27 Eason Jimmy W Abrasive wear resistant hardfacing materials, drill bits and drilling tools including abrasive wear resistant hardfacing materials, and methods for applying abrasive wear resistant hardfacing materials to drill bits and drilling tools
US20080083568A1 (en) * 2006-08-30 2008-04-10 Overstreet James L Methods for applying wear-resistant material to exterior surfaces of earth-boring tools and resulting structures
US20080135304A1 (en) * 2006-12-12 2008-06-12 Baker Hughes Incorporated Methods of attaching a shank to a body of an earth-boring drilling tool, and tools formed by such methods
US20080145686A1 (en) * 2006-10-25 2008-06-19 Mirchandani Prakash K Articles Having Improved Resistance to Thermal Cracking
US20080156148A1 (en) * 2006-12-27 2008-07-03 Baker Hughes Incorporated Methods and systems for compaction of powders in forming earth-boring tools
US20080202814A1 (en) * 2007-02-23 2008-08-28 Lyons Nicholas J Earth-boring tools and cutter assemblies having a cutting element co-sintered with a cone structure, methods of using the same
US20090041612A1 (en) * 2005-08-18 2009-02-12 Tdy Industries, Inc. Composite cutting inserts and methods of making the same
US20090293672A1 (en) * 2008-06-02 2009-12-03 Tdy Industries, Inc. Cemented carbide - metallic alloy composites
US20090308662A1 (en) * 2008-06-11 2009-12-17 Lyons Nicholas J Method of selectively adapting material properties across a rock bit cone
US20100000798A1 (en) * 2008-07-02 2010-01-07 Patel Suresh G Method to reduce carbide erosion of pdc cutter
US20100006345A1 (en) * 2008-07-09 2010-01-14 Stevens John H Infiltrated, machined carbide drill bit body
US7784567B2 (en) 2005-11-10 2010-08-31 Baker Hughes Incorporated Earth-boring rotary drill bits including bit bodies comprising reinforced titanium or titanium-based alloy matrix materials, and methods for forming such bits
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US20100303566A1 (en) * 2007-03-16 2010-12-02 Tdy Industries, Inc. Composite Articles
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US20100326739A1 (en) * 2005-11-10 2010-12-30 Baker Hughes Incorporated Earth-boring tools comprising silicon carbide composite materials, and methods of forming same
US20110107811A1 (en) * 2009-11-11 2011-05-12 Tdy Industries, Inc. Thread Rolling Die and Method of Making Same
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US8978734B2 (en) 2010-05-20 2015-03-17 Baker Hughes Incorporated Methods of forming at least a portion of earth-boring tools, and articles formed by such methods
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DE1160635B (en) * 1958-02-28 1964-01-02 Nat Distillers Chem Corp Titanium alloy having a low hydrogen content and methods for the same remuneration
DE1161435B (en) * 1958-09-25 1964-01-16 Nat Distillers Chem Corp Heat treatable Ti-Al-V-Fe alloy of high ductility and high strength
US3436277A (en) * 1966-07-08 1969-04-01 Reactive Metals Inc Method of processing metastable beta titanium alloy
US5311655A (en) * 1990-10-05 1994-05-17 Bohler Edelstahl Gmbh Method of manufacturing titanium-aluminum base alloys
AT399513B (en) * 1990-10-05 1995-05-26 Boehler Edelstahl A method and device for producing metallic alloys for materials, components, workpieces or the like from titanium-aluminum base alloys
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US20080073125A1 (en) * 2005-09-09 2008-03-27 Eason Jimmy W Abrasive wear resistant hardfacing materials, drill bits and drilling tools including abrasive wear resistant hardfacing materials, and methods for applying abrasive wear resistant hardfacing materials to drill bits and drilling tools
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US20070056777A1 (en) * 2005-09-09 2007-03-15 Overstreet James L Composite materials including nickel-based matrix materials and hard particles, tools including such materials, and methods of using such materials
US8002052B2 (en) 2005-09-09 2011-08-23 Baker Hughes Incorporated Particle-matrix composite drill bits with hardfacing
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US9700991B2 (en) 2005-11-10 2017-07-11 Baker Hughes Incorporated Methods of forming earth-boring tools including sinterbonded components
US20070102199A1 (en) * 2005-11-10 2007-05-10 Smith Redd H Earth-boring rotary drill bits and methods of manufacturing earth-boring rotary drill bits having particle-matrix composite bit bodies
US20070102200A1 (en) * 2005-11-10 2007-05-10 Heeman Choe Earth-boring rotary drill bits including bit bodies having boron carbide particles in aluminum or aluminum-based alloy matrix materials, and methods for forming such bits
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