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Titanium alloy

a technology of titanium alloy and alloy, applied in the direction of metal-working apparatus, transportation and packaging, etc., can solve the problem of undesirable contaminant chlorin

Inactive Publication Date: 2007-01-25
CRISTAL US INC
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  • Application Information

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Benefits of technology

[0013] Yet another object of the invention is to make a 6/4 alloy as set forth in which sodium is present in significantly smaller amounts than is present in CP titanium powder made by the Armstrong Process.
[0014] Still another object of the present invention is to provide a titanium base alloy powder having about 6% by weight aluminum and about 4% by weight vanadium with an alkali or alkaline earth metal being present in an amount less than about 200 ppm and the alloy powder being neither spherical nor angular or flake shaped.
[0015] A further object of the present invention is to provide a titanium base alloy powder having about 6% by weight aluminum and about 4% by weight vanadium with an alkali or alkaline earth metal being present in an amount less than ab

Problems solved by technology

Moreover, Hunter fines have large concentrations of chlorine while Armstrong CP powder has low concentrations of chlorine; chlorine is an undesirable contaminant.

Method used

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Embodiment Construction

[0026] As used herein, a “titanium base alloy” means any alloy having 50% or more by weight titanium. Although 6 / 4 is used as a specific example, other titanium base alloys are included in this invention. As seen from the previous discussion, Armstrong CP titanium powder is different from spheridized titanium powder and from hydride-dehydride titanium powder in both morphology and packing fraction or tap density. There are also differences in certain of the chemical constituents. For instance, Armstrong CP titanium powder has sodium present in the 400-700 ppm range while spheridized and hydride-dehydride powder should have none or only trace amounts. Armstrong CP titanium has little chloride concentration, on the order of <50 ppm, while Hunter fines have much larger concentrations of chlorides, on the order of 0.12-0.15 wt. %.

[0027] The equipment used to produce the 6 / 4 alloy is substantially as disclosed in the aforementioned patents disclosing the Armstrong Process with the excep...

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Abstract

A titanium base alloy powder having lesser amounts of aluminum and vanadium with an alkali or alkaline earth metal being present in an amount of less than about 200 ppm. The alloy powder is neither spherical nor angular and flake shaped. 6 / 4 alloy is specifically disclosed having a packing fraction or tap density between 4 and 11%, as is a method for making the various alloys.

Description

FIELD OF THE INVENTION [0001] This invention relates to alloys of titanium having at least 50% titanium and most specifically to an alloy of titanium particularly useful in the aerospace and defense industries known as 6 / 4 which is about 6% by weight aluminum and about 4% by weight vanadium with the balance titanium and trace materials as made by the Armstrong process. BACKGROUND OF THE INVENTION [0002] The ASTM B265 grade 5 chemical specifications for 6 / 4 require that vanadium is present in the amount of 4%±1% by weight and aluminum is present in the range of from about 5.5% to about 6.75% by weight. The alloy of the invention is produced by the Armstrong Process as previously disclosed in U.S. Pat. Nos. 5,779,761; 5,958,106 and 6,609,797, the entire disclosures of which are herein incorporated by reference. The aforementioned patents teach the Armstrong Process as it relates to the production of various materials including alloys. The Armstrong Process includes the subsurface redu...

Claims

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Application Information

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IPC IPC(8): C22C14/00B22F1/00B22F1/05
CPCB22F2998/00C22B34/1272C22C1/0458C22C14/00B22F1/05B22F1/00B22F3/10B22F9/28B22F2301/205
Inventor JACOBSEN, LANCEBENISH, ADAM
Owner CRISTAL US INC
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