US2922714A - Columbium-tantalum-aluminum alloy - Google Patents
Columbium-tantalum-aluminum alloy Download PDFInfo
- Publication number
- US2922714A US2922714A US650291A US65029157A US2922714A US 2922714 A US2922714 A US 2922714A US 650291 A US650291 A US 650291A US 65029157 A US65029157 A US 65029157A US 2922714 A US2922714 A US 2922714A
- Authority
- US
- United States
- Prior art keywords
- columbium
- tantalum
- alloy
- titanium
- aluminum
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 229910000838 Al alloy Inorganic materials 0.000 title claims description 8
- 239000010955 niobium Substances 0.000 claims description 17
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 claims description 15
- 229910052715 tantalum Inorganic materials 0.000 claims description 14
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 claims description 14
- 229910052782 aluminium Inorganic materials 0.000 claims description 12
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 8
- 239000012535 impurity Substances 0.000 claims description 8
- 229910045601 alloy Inorganic materials 0.000 description 34
- 239000000956 alloy Substances 0.000 description 34
- 239000010936 titanium Substances 0.000 description 24
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 22
- 229910052719 titanium Inorganic materials 0.000 description 22
- 238000007792 addition Methods 0.000 description 14
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 13
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 12
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 6
- 229910001069 Ti alloy Inorganic materials 0.000 description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 6
- 239000001257 hydrogen Substances 0.000 description 6
- 229910052739 hydrogen Inorganic materials 0.000 description 6
- 229910052742 iron Inorganic materials 0.000 description 6
- 229910052757 nitrogen Inorganic materials 0.000 description 6
- 239000001301 oxygen Substances 0.000 description 6
- 229910052760 oxygen Inorganic materials 0.000 description 6
- 229910052710 silicon Inorganic materials 0.000 description 6
- 239000010703 silicon Substances 0.000 description 6
- 229910001040 Beta-titanium Inorganic materials 0.000 description 4
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 4
- 239000000470 constituent Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 3
- 230000014759 maintenance of location Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910000592 Ferroniobium Inorganic materials 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 230000002939 deleterious effect Effects 0.000 description 2
- 150000002431 hydrogen Chemical class 0.000 description 2
- 239000011572 manganese Substances 0.000 description 2
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 229910001021 Ferroalloy Inorganic materials 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 239000010953 base metal Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- -1 columbium metals Chemical class 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- RHDUVDHGVHBHCL-UHFFFAOYSA-N niobium tantalum Chemical compound [Nb].[Ta] RHDUVDHGVHBHCL-UHFFFAOYSA-N 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C27/00—Alloys based on rhenium or a refractory metal not mentioned in groups C22C14/00 or C22C16/00
- C22C27/02—Alloys based on vanadium, niobium, or tantalum
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
Definitions
- This invention relates to a columbium-tantalum-aluminum alloy particularly adapted as an additive for titanium base alloys.
- Titanium exists in either of two crystallinefforms. At low temperatures, it exists in the hexagonal crystal form known as the alpha phase, and. transforms at about 885 C. into the cubic crystal form known as the beta phase.
- Beta alloys are generally characterized by excellent weldability and are admirably suited in the production of titanium sheet alloy where bending'properties are the criterion.
- some general disadvantages of the beta titanium base alloys are their poor tensile ductility, poor retention of strength-at elevated temperatures, and poor metallurgical stability.
- alpha titanium base alloys are much more stable and possess good retention of strength at elevated temperatures and good tensile ductility.
- the chief disadvantage of the alpha type titanium alloy is its-poor bend ductility. Because ofthe increasing use-of titanium in industry, there is a demand for a titanium product having the beneficial properties of both the alpha and the betatitanium alloys.
- Certain alloying additions to a titanium base metal serve to increase the structural strength of titanium alloys. These constituents are usually added as. pure metals or as ferro-alloys, such as ferrocolumbium or ferrotantalumcolumbium.
- ferro-alloys such as ferrocolumbium or ferrotantalumcolumbium.
- the addition of these, desirable constituents as relatively pure metals is an expensive procedure and has the added disadvantage of poor rate of solution because of the high melting points of the pure metal additives.
- Both tantalum ,and columbium metals are highly malleable materials and, therefore, lack the requisite brittleness to be reduced to powder form.
- Tantalum and columbium additions 'as commercial alloys present a problem in controlling the introduction of such deleterious elements to titanium as oxygen, hydrogen, nitrogen, iron, carbon and silicon, which are normally present in ferrocolumbium and ferrotantalum-columbium in substantial percentages.
- Another object of the present invention is to provide an addition alloy of columbium-tantalum-aluminum which can be economically used as an addition agent for the production of a stable titanium base alloy.
- Another object of the present invention is to provide an addition alloy of columbium-tantalum-aluminum' essentially free of such deleterious elements to titanium as oxygen, nitrogen, hydrogen, iron, carbon and silicon.
- Another object of the invention is to provide an addited States Patent tion alloy of ,columbium-tantalum-aluminum which can be readily reduced tofinely divided form by means of conventional crusher apparatus.
- the invention by meansof which these objects are 5 achieved is, based on .the discovery that. the addition to a titanium melt of a properly. proportioned master alloy, in which both alpha and beta phase promoters are present, produces an excellent grade of titanium alloy having an advantageous combination of desirable characteiistics'found in all-alpha titanium alloys and all-beta titanium alloys.
- the master alloy of the invention comprises as essential constituents, columbium and tantalum, which are known to retard the formation of alpha-phase titanium and to stabilizethe beta phase titanium, and aluminum which has a strong tendency to promote the formation of alpha-phase titanium.
- the rangeof composition should be within the following limits. g 1
- Table I are set forth results obtained on analysis 5 of a typical addition alloy of the invention.
- the typical alloy addition was made in a heat in which fused columbo tantalite and crude columbium oxide of the following compositions were reduced with excess aluminum in the presence of lime to produce a tantalum-columbium alloy containing Al.
- the subject alloy possesesjgood crushability, an important attribute which is economically desirable in alloy additions, particularly those containing tantalum and columbium constituents.
- Table II Shown in Table II below are the results of a typical screen analysis of the alloy specified in Table I.
- the alloy was readily crushed in conventional crusher apparatus.
- the tantalumcolumbium-aluminum master alloy of the present in vention isideallysuited as an addition agent to a titanium base alloy.
- a titanium alloy When added to a titanium alloy, it is effective in producing a titanium base alloy having a highly desirable combination of properties previously occurring in part in alpha titanium "alloys and beta titanium alloys.
- the alloyof the invention is easily reduced to powder form, and its use in readily prepared accurate quantities substantially reduces production costs.
- a columbiumtantalum-aluminumalloy consisting essentially of about 10% to 35% tantalum, 10% to 35% columbium, and the remainder aluminum and incidental impurities.
- a columbium-t-atalum-aluminum alloy consisting essentiallyof about 10% to 20% tantalum, 25% to.35% columbium, and the remainder aluminum and incidental impurities. 7
- a columbium-tantalum-aluminum alloy consisting essentially of about 10% to 35% tantalum, 10% to 35% columbium, 20% to 75% aluminum, up to 3% iron, up to 1.5% silicon, up to 7% manganese, up to 0.5% of oxygen, hydrogen and nitrogen, and the remainder incidental impurities.
- a columbium-tantalum-aluminum alloy consisting essentially of about 10% to20% tantalum, 25% to 35% columbium, 35% to aluminum, up to 2.5% iron, up to 1.0% silicon, up to 5.5% manganese, up to 0.25% oxygen, hydrogen and nitrogen, and the remainder incidental impurities.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Description
1,922,714 t v COLUMBIUM-TANTALUM-ALUMINUMALLOY' John L. Benham, Lewiston, N.Y., assignor to Union Carbide Corporation, a corporation of New York No Drawing. Application April 3, 1957 Serial No. 650,291
4 Claims. (Cl. 75-138) This invention relates to a columbium-tantalum-aluminum alloy particularly adapted as an additive for titanium base alloys.
Titanium exists in either of two crystallinefforms. At low temperatures, it exists in the hexagonal crystal form known as the alpha phase, and. transforms at about 885 C. into the cubic crystal form known as the beta phase. Beta alloys are generally characterized by excellent weldability and are admirably suited in the production of titanium sheet alloy where bending'properties are the criterion. However, some general disadvantages of the beta titanium base alloys are their poor tensile ductility, poor retention of strength-at elevated temperatures, and poor metallurgical stability. On the other hand, alpha titanium base alloys are much more stable and possess good retention of strength at elevated temperatures and good tensile ductility. The chief disadvantage of the alpha type titanium alloy is its-poor bend ductility. Because ofthe increasing use-of titanium in industry, there is a demand for a titanium product having the beneficial properties of both the alpha and the betatitanium alloys.
Certain alloying additions to a titanium base metal, among which are columbium and tantalum, serve to increase the structural strength of titanium alloys. These constituents are usually added as. pure metals or as ferro-alloys, such as ferrocolumbium or ferrotantalumcolumbium. The addition of these, desirable constituents as relatively pure metals is an expensive procedure and has the added disadvantage of poor rate of solution because of the high melting points of the pure metal additives. Both tantalum ,and columbium metals are highly malleable materials and, therefore, lack the requisite brittleness to be reduced to powder form. Tantalum and columbium additions 'as commercial alloys present a problem in controlling the introduction of such deleterious elements to titanium as oxygen, hydrogen, nitrogen, iron, carbon and silicon, which are normally present in ferrocolumbium and ferrotantalum-columbium in substantial percentages.
It is therefore an important object of the present invention to provide an addition agent for a titanium melt that is effective in producing a stable titanium base alloy having a desirable combination of good weldability, good tensile and bend ductility, the retention of strength at elevated temperatures, and a higher service temperature than present day all-alpha titanium base alloys.
Another object of the present invention is to provide an addition alloy of columbium-tantalum-aluminum which can be economically used as an addition agent for the production of a stable titanium base alloy.
Another object of the present invention is to provide an addition alloy of columbium-tantalum-aluminum' essentially free of such deleterious elements to titanium as oxygen, nitrogen, hydrogen, iron, carbon and silicon.
Another object of the invention is to provide an addited States Patent tion alloy of ,columbium-tantalum-aluminum which can be readily reduced tofinely divided form by means of conventional crusher apparatus.
' ,The invention by meansof which these objects are 5 achieved is, based on .the discovery that. the addition to a titanium melt of a properly. proportioned master alloy, in which both alpha and beta phase promoters are present, produces an excellent grade of titanium alloy having an advantageous combination of desirable characteiistics'found in all-alpha titanium alloys and all-beta titanium alloys. The master alloy of the invention comprises as essential constituents, columbium and tantalum, which are known to retard the formation of alpha-phase titanium and to stabilizethe beta phase titanium, and aluminum which has a strong tendency to promote the formation of alpha-phase titanium. Small amounts of other elements such as iron, silicon and manganese may be present in limited amounts, and gaseous impurities such as oxygen, hydrogen and nitrogen may bev present as incidental impurities. The addition of the subject alloy results in a titanium alloy having a stable structure comprising an alpha matrix in which some beta phase is present. I
In a preferred embodiment of the alloy addition of the invention, the rangeof composition should be within the following limits. g 1
Preferred, percent Broad,
percent up to 2.5 up to 1.0 up to 5.5 up to 0.25 remainder Optimum results are obtained within the above range when the ratio of columbium to tantalum is approximately 2 to 1, the ratio of aluminum to the combined tantalum and columbium content is 5 to 3, the iron does not exceed 4% of the combined tantalum and columbium content, the'silicon does not exceed 1.5% of the tantalum and columbium, and the total oxygen, hydrogen and nitrogen not exceeding 0.5% of thetantalum and columbium.
In Table I are set forth results obtained on analysis 5 of a typical addition alloy of the invention. The typical alloy addition was made in a heat in which fused columbo tantalite and crude columbium oxide of the following compositions were reduced with excess aluminum in the presence of lime to produce a tantalum-columbium alloy containing Al.
Fused Columblum Columbo- Oxide tantalite TABLE I Chemical analysis Element: Percent Ta 12.82 Al 49.85
Ti 1.79 Fe 1.45 Si 0.54 Mn 4.75
O 0.010 H 0.013 Impurities Remainder As afeature of the invention, the subject alloy possesesjgood crushability, an important attribute which is economically desirable in alloy additions, particularly those containing tantalum and columbium constituents.
Shown in Table II below are the results of a typical screen analysis of the alloy specified in Table I. The alloy was readily crushed in conventional crusher apparatus.
TABLE 11 Screen analysis Retained on: Percent /4 Nil 8 Mesh 88.88
mesh 8.03
48 mesh 1.41
100 mesh 0.94 Thru 100' mesh Balance Typical mechanical properties of dnneale d Ti base alloy sheet (.04 thick) .040 inch sheet Ultimate tensile strengthipsi.) 127, 000
Yield Strength, 0.2% offset (psi 120, 000
Elongation (percent) 16 Min. bend radius w) 34 tlnckness Welding tests on the above final titanium base alloy indicated that the alloy is readily welded with the same techniques used for commercially pure titanium, and that the weld sections possess substantially the same bend ductility and mechanical properties as the unwelded sections of the alloy.
From the above it will be seen that the tantalumcolumbium-aluminum master alloy of the present in vention isideallysuited as an addition agent to a titanium base alloy. When added to a titanium alloy, it is effective in producing a titanium base alloy having a highly desirable combination of properties previously occurring in part in alpha titanium "alloys and beta titanium alloys. In addition, the alloyof the invention is easily reduced to powder form, and its use in readily prepared accurate quantities substantially reduces production costs.
It will be understood that modifications and variations'may be etfected'without departing from the spirit and scope-of the novel concepts of the present invention.
Whatisclaimedisz l. A columbiumtantalum-aluminumalloy consisting essentially of about 10% to 35% tantalum, 10% to 35% columbium, and the remainder aluminum and incidental impurities.
2. A columbium-t-atalum-aluminum alloy consisting essentiallyof about 10% to 20% tantalum, 25% to.35% columbium, and the remainder aluminum and incidental impurities. 7
3. A columbium-tantalum-aluminum alloy consisting essentially of about 10% to 35% tantalum, 10% to 35% columbium, 20% to 75% aluminum, up to 3% iron, up to 1.5% silicon, up to 7% manganese, up to 0.5% of oxygen, hydrogen and nitrogen, and the remainder incidental impurities. 1
4. A columbium-tantalum-aluminum alloy consisting essentially of about 10% to20% tantalum, 25% to 35% columbium, 35% to aluminum, up to 2.5% iron, up to 1.0% silicon, up to 5.5% manganese, up to 0.25% oxygen, hydrogen and nitrogen, and the remainder incidental impurities.
References Cited in the file of this patent UNITED STATES PATENTS 2,369,354 Kenipf et al. Feb. 13, 1945 2,579,369 Dawe Dec. 18, 1951 2,711,9 0 Methe June 28, 1955 2,740,711 Herres et Apr. 3, 1956 2,754,204 Iaifee et al. July 10, 1956 2,769,707 Vordahl Nov. 6, 1956
Claims (1)
1. A COLUMBIUM-TANTALUM-ALUMINUM ALLOY CONSISTING ESSENTIALLY OF ABOUT 10% TO 35% TANTALUM, 10% TO 35% COLUMBIUM, AND THE REMAINDER ALUMINUM AND INCIDENTAL IMPURITIES.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US650291A US2922714A (en) | 1957-04-03 | 1957-04-03 | Columbium-tantalum-aluminum alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US650291A US2922714A (en) | 1957-04-03 | 1957-04-03 | Columbium-tantalum-aluminum alloy |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US2922714A true US2922714A (en) | 1960-01-26 |
Family
ID=24608276
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US650291A Expired - Lifetime US2922714A (en) | 1957-04-03 | 1957-04-03 | Columbium-tantalum-aluminum alloy |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US2922714A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2964399A (en) * | 1959-06-25 | 1960-12-13 | Titanium Metals Corp | Tantalum-titanium corrosion resistant alloy |
| US3104252A (en) * | 1958-12-29 | 1963-09-17 | Continental Oil Co | Preparation of organoaluminum compounds in the presence of a catalytic amount of ti, zr, nb, v, sc, u, or hf |
| US3172196A (en) * | 1963-01-22 | 1965-03-09 | Brush Beryllium Co | Sintered intermetallic compoundcomposition bodies |
| US9470462B2 (en) | 2012-12-14 | 2016-10-18 | TITAN Metal Fabricators | Heat exchanger for heating hydrochloric acid pickling solution, a system and method for pickling, and a method of manufacturing steel products |
| CN110408806A (en) * | 2019-08-22 | 2019-11-05 | 承德天大钒业有限责任公司 | A kind of aluminum-niobium-tantalum master alloy and preparation method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2369354A (en) * | 1942-06-06 | 1945-02-13 | Aluminum Co Of America | Aluminum base alloy |
| US2579369A (en) * | 1948-09-13 | 1951-12-18 | Vanadium Corp Of America | Addition alloy for treatment of steel |
| US2711960A (en) * | 1953-11-17 | 1955-06-28 | Allegheny Ludlum Steel | Titanium base alloys with aluminum, manganese, and chromium |
| US2740711A (en) * | 1952-04-29 | 1956-04-03 | Allegheny Ludlum Steel | Iron chromium molybdenum titanium base alloy |
| US2754204A (en) * | 1954-12-31 | 1956-07-10 | Rem Cru Titanium Inc | Titanium base alloys |
| US2769707A (en) * | 1952-11-01 | 1956-11-06 | Rem Cru Titanium Inc | Thermally stable beta alloys of titanium-tin alloys |
-
1957
- 1957-04-03 US US650291A patent/US2922714A/en not_active Expired - Lifetime
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2369354A (en) * | 1942-06-06 | 1945-02-13 | Aluminum Co Of America | Aluminum base alloy |
| US2579369A (en) * | 1948-09-13 | 1951-12-18 | Vanadium Corp Of America | Addition alloy for treatment of steel |
| US2740711A (en) * | 1952-04-29 | 1956-04-03 | Allegheny Ludlum Steel | Iron chromium molybdenum titanium base alloy |
| US2769707A (en) * | 1952-11-01 | 1956-11-06 | Rem Cru Titanium Inc | Thermally stable beta alloys of titanium-tin alloys |
| US2711960A (en) * | 1953-11-17 | 1955-06-28 | Allegheny Ludlum Steel | Titanium base alloys with aluminum, manganese, and chromium |
| US2754204A (en) * | 1954-12-31 | 1956-07-10 | Rem Cru Titanium Inc | Titanium base alloys |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3104252A (en) * | 1958-12-29 | 1963-09-17 | Continental Oil Co | Preparation of organoaluminum compounds in the presence of a catalytic amount of ti, zr, nb, v, sc, u, or hf |
| US2964399A (en) * | 1959-06-25 | 1960-12-13 | Titanium Metals Corp | Tantalum-titanium corrosion resistant alloy |
| US3172196A (en) * | 1963-01-22 | 1965-03-09 | Brush Beryllium Co | Sintered intermetallic compoundcomposition bodies |
| US9470462B2 (en) | 2012-12-14 | 2016-10-18 | TITAN Metal Fabricators | Heat exchanger for heating hydrochloric acid pickling solution, a system and method for pickling, and a method of manufacturing steel products |
| CN110408806A (en) * | 2019-08-22 | 2019-11-05 | 承德天大钒业有限责任公司 | A kind of aluminum-niobium-tantalum master alloy and preparation method thereof |
| CN110408806B (en) * | 2019-08-22 | 2020-12-18 | 承德天大钒业有限责任公司 | A kind of aluminum-niobium-tantalum master alloy and preparation method thereof |
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