US2616797A - Alloy for the preparation of titanium-boron steel - Google Patents
Alloy for the preparation of titanium-boron steel Download PDFInfo
- Publication number
- US2616797A US2616797A US201700A US20170050A US2616797A US 2616797 A US2616797 A US 2616797A US 201700 A US201700 A US 201700A US 20170050 A US20170050 A US 20170050A US 2616797 A US2616797 A US 2616797A
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- US
- United States
- Prior art keywords
- titanium
- alloy
- boron
- steel
- 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
- 229910045601 alloy Inorganic materials 0.000 title description 38
- 239000000956 alloy Substances 0.000 title description 38
- QDMRQDKMCNPQQH-UHFFFAOYSA-N boranylidynetitanium Chemical compound [B].[Ti] QDMRQDKMCNPQQH-UHFFFAOYSA-N 0.000 title description 8
- 229910000712 Boron steel Inorganic materials 0.000 title description 5
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 32
- 239000010936 titanium Substances 0.000 claims description 32
- 229910052719 titanium Inorganic materials 0.000 claims description 32
- 229910052782 aluminium Inorganic materials 0.000 claims description 19
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 19
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 16
- 239000012535 impurity Substances 0.000 claims description 12
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 11
- 229910052799 carbon Inorganic materials 0.000 claims description 11
- 229910052742 iron Inorganic materials 0.000 claims description 8
- 229910000831 Steel Inorganic materials 0.000 description 27
- 239000010959 steel Substances 0.000 description 27
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 21
- 229910052796 boron Inorganic materials 0.000 description 20
- 239000000203 mixture Substances 0.000 description 8
- 229910052710 silicon Inorganic materials 0.000 description 8
- 229910000519 Ferrosilicon Inorganic materials 0.000 description 7
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- 238000011084 recovery Methods 0.000 description 6
- 239000010703 silicon Substances 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 5
- BZSXEZOLBIJVQK-UHFFFAOYSA-N 2-methylsulfonylbenzoic acid Chemical compound CS(=O)(=O)C1=CC=CC=C1C(O)=O BZSXEZOLBIJVQK-UHFFFAOYSA-N 0.000 description 4
- 229910001021 Ferroalloy Inorganic materials 0.000 description 4
- YDZQQRWRVYGNER-UHFFFAOYSA-N iron;titanium;trihydrate Chemical compound O.O.O.[Ti].[Fe] YDZQQRWRVYGNER-UHFFFAOYSA-N 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 238000007254 oxidation reaction Methods 0.000 description 4
- 150000002739 metals Chemical class 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 229910000521 B alloy Inorganic materials 0.000 description 2
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 2
- 239000004327 boric acid Substances 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- -1 titanium-boron-aluminum Chemical compound 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 229910000532 Deoxidized steel Inorganic materials 0.000 description 1
- 229910001200 Ferrotitanium Inorganic materials 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 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 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- SNICXCGAKADSCV-UHFFFAOYSA-N nicotine Chemical compound CN1CCCC1C1=CC=CN=C1 SNICXCGAKADSCV-UHFFFAOYSA-N 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 229920000136 polysorbate Polymers 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
Definitions
- This invention relates to alloys containing titanium, boron, and aluminum which are particularly adapted for use in the manufacture of titanium-boron steels.
- steels containing about 0.3 to 0.5% titanium and 0.01 to 0.03% boron are characterized by superior resistance to load at moderately high temperatures.
- Such steels may be manufactured by adding to molten steel, after de-oxidizing, suitable amounts of metallic titanium and metallic boron, which preferably, are added in the form of ferro-all-oys.
- a de oxidizing agent such as aluminum which improves the recovery of the added titanium and boron by protecting them from loss by oxidation, aluminum being more readily oxidized than either of these metals.
- the object of the present invention to provide a single alloy to be added to steel which will provide titanium and boron in proper proportions and which will insure high, uniform, predictable recoveries of these metals in finished steel. It is another object of this invention to provide a, more efficient and economical method for. production of titanium boron alloy steel.
- This invention in its broadest aspects contemplates provision of an alloy consisting of from about to of titanium, from about 1.5% to 2.8% boron, from about 8% to 15% aluminum and the remainder substantially all iron and incidental impurities.
- the impurities may include not more than an insignificant percentage of carbon, about 0.1%, for reasons hereinafter explained in more detail.
- Such an alloy when added to molten steel, after lie-oxidation, will produce titanium-boron steel in which the titanium recovery will be about and the boron recovery about
- a suitable method for preparation of an alloy according to this invention is shown:
- An alternative method for preparation of the alloy of this invention employs ferrosilicon, pref-. erably high grade ferrosilicon e. g. 94% Si, in the ignited mixture which improves the efiiciency of the ther-mit reaction and therefore promotes better recovery of the alloy ingredients. Under these conditions, alloys containing aluminum in the lower ranges, that is 7 to 10%, may be produced.
- the amount of ferrosilicon in the origi-, nal mixture should be such that not more than 4% silicon will be present in the product alloy, and in such amounts this element will not significantly affect the action or the usefulness of the alloy since the amount of silicon introduced into treated steel will have a negligible effect on the properties thereof.
- Example 2 A mixture of the following:
- a 100 lb. batch of molten, de-oxidized steel was treated by addition of 1 lb. of the alloy made according to .Example 1.
- the alloy was added in the form of lumps which dissolved readily in the steel forming a titanium boron steel containing 0.32% titanium and 0.023% boron.
- the alloy of this invention comprises titanium, boron, and, aluminum with the remainder iron except for the presence of incidental impurities which may be derived from the ores and ingredients employed. These impurities may include silicon, chromium, manganese, sulphur, phosphorus and other elements which in the amounts present, have negligible effect on the useful properties of the alloy.
- the alloy of this invention is substantially carbon free and this element cannot be tolerated as an impurity in more than insignificant amounts for instance about 0.1%. This is necessary because the boron content of the finished steel will result in hot shortness unless the carbon in the steel is completely stabilized by titanium. Hot-short steel cannot be rolled under the usual steel mill conditions.
- titanium-boron steel in order to preserve proper working characteristics in the steel, it is essential to keep the carbon content as low as possible and to insure that any amount present be stabilized by titanium.
- the ranges of titanium, aluminum, and boron in the alloy of this invention are critical for the introduction of the desired percentages of titanium and boron in the steel with uniform and high efiiciency, and the titanium content of the alloy cannot also compensate for the introduction of additional carbon, and under these conditions, the presence of any appreciable amount of carbon in the alloy of the present invention would seriously detract from its usefulness in the manufacture of titanium-boron steel.
- Such incidental impurities will not generally be present in excess of about 2% except when ferrosilicon is employed in the manufacture of the alloy and under these conditions, due to the presence of silicon, will not exceed about 6%.
- the alloy of the present invention permits simultaneous addition of titanium and boron to molten steel conveniently and economically by a single addition which insures ready control of the proper percentages of these metals in the finished steel.
- the alloy of the present invention conextent.
- the proportion of titanium present in the alloy according to this invention is such that efficient and ready solution is obtained. Alloys containing more than about 45% titanium are difiicult to dissolve in steel, while if less than about 35 titanium is present, too large an addition to steel is required to obtain the proper titanium content.
- the range of titanium in the alloy of the present invention is "be-- tween about 35% and 45% titanium; the boron content is adjusted so that the proper ratio of this element to the titanium is present allowing for losses in the constituents of the alloy when employed in the treatment of steel.
- An alloy of the class described consisting of from about 35% to 45% titanium, from about 1.5% to 2.8% boron, from about 7% to 15% aluminum, less than 0.1% carbon and the remainder iron and incidental impurities.
- An alloy of the class described consisting of about 38% titanium, about 2.6% boron, about 14.4% aluminum, less than 0.1% carbon and the remainder iron and incidenta1 impurities.
- a method for production of titanium boron alloy steel which comprises adding to deoxidized steel while molten, an alloy consisting of from about 35% to 45% titanium, from about 1.5% to 2.8% boron, from about 7% to 15% aluminum, less than 0.1% carbon and the remainder iron and 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)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Description
Patented Nov. 4, 1952 ALLOY FOR THE PREPARATION OF TITANIUM-BORON STEEL Viatcheslav V. Efimofic, Niagara Falls, N. Y., as-
signor to National Lead Company, New York, N. Y., a corporation of New Jersey N Drawing. Continuation of application Serial No. 95,573, May 26, 1949.
This application December 19, 1950, Serial No. 201,700
3 Claims.
This invention relates to alloys containing titanium, boron, and aluminum which are particularly adapted for use in the manufacture of titanium-boron steels.
It has been previously known that steels containing about 0.3 to 0.5% titanium and 0.01 to 0.03% boron are characterized by superior resistance to load at moderately high temperatures. Such steels may be manufactured by adding to molten steel, after de-oxidizing, suitable amounts of metallic titanium and metallic boron, which preferably, are added in the form of ferro-all-oys. At the temperatures at which these alloys are added to the steel, loss by oxidation of the added elements, particularly the titanium, is, to some degree, inevitable. It is helpful, therefore, to also add a de oxidizing agent such as aluminum which improves the recovery of the added titanium and boron by protecting them from loss by oxidation, aluminum being more readily oxidized than either of these metals. The presence of aluminum has also been found to decrease the fusion poin'tan-d improve the solubility (in molten steel) 01 ferro-titanium alloys. However, even under such conditions, the recoveries of titanium and boron have been diificult to predict with sufficlent accuracy to insure the proper proportions of these added alloy elements in the final finished steel.
' It is, therefore, the object of the present invention to provide a single alloy to be added to steel which will provide titanium and boron in proper proportions and which will insure high, uniform, predictable recoveries of these metals in finished steel. It is another object of this invention to provide a, more efficient and economical method for. production of titanium boron alloy steel. These and other objects of the invention will be apparent from the following description thereof.
This invention in its broadest aspects contemplates provision of an alloy consisting of from about to of titanium, from about 1.5% to 2.8% boron, from about 8% to 15% aluminum and the remainder substantially all iron and incidental impurities. The impurities may include not more than an insignificant percentage of carbon, about 0.1%, for reasons hereinafter explained in more detail. Such an alloy when added to molten steel, after lie-oxidation, will produce titanium-boron steel in which the titanium recovery will be about and the boron recovery about For illustration of a suitable method for preparation of an alloy according to this invention. the following example is shown:
2 Example 1 A mixture of the following:
46.5 lbs. calcined granular ilmenite 22 lbs. refined granular rutile 36 lbs. pure grained aluminum 6 lbs. fused boric acid 10 lbs. sodium chlorate with the following starting mix on top:
2 lbs. calcined granular ilmenite 1 lb. pure grained aluminum 0.5 lb. sodium chlorate was ignited to produce a titanium-boron-alumi nu=m ferro alloy by thermit reaction.
As a result of this reaction, 30 pounds of alloy containing 38.04% titanium, 14.39% aluminum, 2.61% boron, 1.08% silicon, 0.07% carbon and the remainder substantially all iron, was obtained and separated from the slag.
An alternative method for preparation of the alloy of this invention employs ferrosilicon, pref-. erably high grade ferrosilicon e. g. 94% Si, in the ignited mixture which improves the efiiciency of the ther-mit reaction and therefore promotes better recovery of the alloy ingredients. Under these conditions, alloys containing aluminum in the lower ranges, that is 7 to 10%, may be produced. The amount of ferrosilicon in the origi-, nal mixture should be such that not more than 4% silicon will be present in the product alloy, and in such amounts this element will not significantly affect the action or the usefulness of the alloy since the amount of silicon introduced into treated steel will have a negligible effect on the properties thereof.
An illustration of the manufacture of the alloy of this invention employing ferrosilicon in the starting mix is shown below.
Example 2 A mixture of the following:
66 lbs. calcined granular ilmenite (61 T102) 8 lbs. refined granular rutile 34 lbs. pure grained aluminum 6 lbs. fused boric acid 5 lbs. sodium chlorate lb. ferro silicon (94% Si) with the following starting mix on top:
1 lbs. calcined granular ilmenite (fil TiOz) 1b. pure grained aluminum 1 lb. sodium chlorate was ignited to produce a titanium-boron-aluminum ferro alloy by thermit reaction.
As .a result of this reaction, 33 lbs. of an alloy containing 41.76% titanium, 8.13% aluminum, 2.36% boron and the remainder substantially all iron with about 4% impurities, was obtained and separated from the slag. The impurities included 2.86% silicon derived from the ferrosilicon employed in the original mixture.
A 100 lb. batch of molten, de-oxidized steel was treated by addition of 1 lb. of the alloy made according to .Example 1. The alloy was added in the form of lumps which dissolved readily in the steel forming a titanium boron steel containing 0.32% titanium and 0.023% boron.
The alloy of this invention comprises titanium, boron, and, aluminum with the remainder iron except for the presence of incidental impurities which may be derived from the ores and ingredients employed. These impurities may include silicon, chromium, manganese, sulphur, phosphorus and other elements which in the amounts present, have negligible effect on the useful properties of the alloy. The alloy of this invention is substantially carbon free and this element cannot be tolerated as an impurity in more than insignificant amounts for instance about 0.1%. This is necessary because the boron content of the finished steel will result in hot shortness unless the carbon in the steel is completely stabilized by titanium. Hot-short steel cannot be rolled under the usual steel mill conditions. Therefore, in order to preserve proper working characteristics in the steel, it is essential to keep the carbon content as low as possible and to insure that any amount present be stabilized by titanium. The ranges of titanium, aluminum, and boron in the alloy of this invention are critical for the introduction of the desired percentages of titanium and boron in the steel with uniform and high efiiciency, and the titanium content of the alloy cannot also compensate for the introduction of additional carbon, and under these conditions, the presence of any appreciable amount of carbon in the alloy of the present invention would seriously detract from its usefulness in the manufacture of titanium-boron steel. Such incidental impurities will not generally be present in excess of about 2% except when ferrosilicon is employed in the manufacture of the alloy and under these conditions, due to the presence of silicon, will not exceed about 6%.
The alloy of the present invention permits simultaneous addition of titanium and boron to molten steel conveniently and economically by a single addition which insures ready control of the proper percentages of these metals in the finished steel. The alloy of the present invention conextent. The proportion of titanium present in the alloy according to this invention is such that efficient and ready solution is obtained. Alloys containing more than about 45% titanium are difiicult to dissolve in steel, while if less than about 35 titanium is present, too large an addition to steel is required to obtain the proper titanium content. Therefore, the range of titanium in the alloy of the present invention is "be-- tween about 35% and 45% titanium; the boron content is adjusted so that the proper ratio of this element to the titanium is present allowing for losses in the constituents of the alloy when employed in the treatment of steel.
Employment of the single alloy of this invention has several advantages over the addition of titanium and boron as separate ferro alloys. The presence of aluminum as a constituent of the alloy assures close proximity of this metal, and therefore, more efficient protection against oxidation losses in the added elements. Furthermore, the inevitable loss of titanium which is more or less readily oxidized at the temperatures involved, is reasonably constant and the amount actually recovered can be predicted to insure the desired content in the finished steel.
This application is a continuation of application, Serial No. 95,573 filed May 26, 1949, now abandoned.
While this invention has been described and i1- lustrated by the examples shown, it is not to be considered to be strictly limited thereto and modifications and variations may be employed within the limits of the following claims.
I claim:
1. An alloy of the class described consisting of from about 35% to 45% titanium, from about 1.5% to 2.8% boron, from about 7% to 15% aluminum, less than 0.1% carbon and the remainder iron and incidental impurities.
2. An alloy of the class described consisting of about 38% titanium, about 2.6% boron, about 14.4% aluminum, less than 0.1% carbon and the remainder iron and incidenta1 impurities.
3. A method for production of titanium boron alloy steel which comprises adding to deoxidized steel while molten, an alloy consisting of from about 35% to 45% titanium, from about 1.5% to 2.8% boron, from about 7% to 15% aluminum, less than 0.1% carbon and the remainder iron and incidental impurities.
VIATCHESLAV V. EFIMOFF.
REFERENCES CITED The following references are of record in the file of this patent:
UNITED STATES PATENTS Number Name Date 2,295,708 Comstock Sept. 15, 1942 FOREIGN PATENTS Number Country Date 561,407 Great Britain May 18, 1944
Claims (1)
1. AN ALLOY OF THE CLASS DESCRIBED CONSISTING OF FROM ABOUT 35% TO 45% TITANIUM, FROM ABOUT 1.5% TO 2.8% TO BORON, FROM ABOUT 7% TO 15% ALUMINUM, LESS THAN 0.1% CARBON AND THE REMAINDER IRON AND INCIENTAL IMPURITIES.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US201700A US2616797A (en) | 1950-12-19 | 1950-12-19 | Alloy for the preparation of titanium-boron steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US201700A US2616797A (en) | 1950-12-19 | 1950-12-19 | Alloy for the preparation of titanium-boron steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US2616797A true US2616797A (en) | 1952-11-04 |
Family
ID=22746932
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US201700A Expired - Lifetime US2616797A (en) | 1950-12-19 | 1950-12-19 | Alloy for the preparation of titanium-boron steel |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US2616797A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1123116B (en) * | 1956-09-05 | 1962-02-01 | Union Carbide Corp | Boron-containing titanium-iron master alloy |
| US4572747A (en) * | 1984-02-02 | 1986-02-25 | Armco Inc. | Method of producing boron alloy |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2295706A (en) * | 1941-06-17 | 1942-09-15 | Titanium Alloy Mfg Co | Alloy for treatment of steel |
| GB561407A (en) * | 1941-09-20 | 1944-05-18 | Arthur Harold Stevens | Improvements in or relating to alloys particularly used for the production of alloy steels |
-
1950
- 1950-12-19 US US201700A patent/US2616797A/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2295706A (en) * | 1941-06-17 | 1942-09-15 | Titanium Alloy Mfg Co | Alloy for treatment of steel |
| GB561407A (en) * | 1941-09-20 | 1944-05-18 | Arthur Harold Stevens | Improvements in or relating to alloys particularly used for the production of alloy steels |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1123116B (en) * | 1956-09-05 | 1962-02-01 | Union Carbide Corp | Boron-containing titanium-iron master alloy |
| US4572747A (en) * | 1984-02-02 | 1986-02-25 | Armco Inc. | Method of producing boron alloy |
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