US3356493A - Alloys for nitriding steel and method of nitriding steel - Google Patents

Alloys for nitriding steel and method of nitriding steel Download PDF

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Publication number
US3356493A
US3356493A US425922A US42592265A US3356493A US 3356493 A US3356493 A US 3356493A US 425922 A US425922 A US 425922A US 42592265 A US42592265 A US 42592265A US 3356493 A US3356493 A US 3356493A
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US
United States
Prior art keywords
steel
nitrogen
weight
alloys
alloy
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
Application number
US425922A
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English (en)
Inventor
Danis Francois
Cloppet Raymond
Montanteme Jean
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Societe dElectro Chimie dElectro Metallurgie et des Acieries Electriques Dugine SA SECEMAU
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Individual
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Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/0006—Adding metallic additives
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C28/00—Alloys based on a metal not provided for in groups C22C5/00 - C22C27/00
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C32/00—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C32/00—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ
    • C22C32/0047—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with carbides, nitrides, borides or silicides as the main non-metallic constituents
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C35/00—Master alloys for iron or steel

Definitions

  • This invention relates to a family of alloys which are introduced into molten steel and impart to the steel a nitrogen content in predictable, given amounts.
  • this gaseous layer might be reduced by introduction of nitrogen combined with a strong reducing agent such as aluminum.
  • a strong reducing agent such as aluminum.
  • aluminum nitride due to its lightness in weight, aluminum nitride is unsuitable because it floats on top of the metal surface, is not wetted by the steel bath and remains more or less coated with slag. The result is an extremely low and most irregular nitrogen yield in the steel.
  • Our present invention relates to:
  • They may also contain other components or impurities generally found in industrial manganese alloys.
  • the alloys are relatively dense and they are wetted by liquid steels at normal steel making temperatures and are most soluble therein. Their melting point is definitely lower than that of steel. Significantly, the presence of aluminum renders the nitrogen dissolution in steel easier and reduces the nitrogen losses during the dissolution.
  • the alloys are made by known industrial processes and they are utilized as homogeneous, crushed or sintered lumps. They are added to the steel either in the furnace before casting, or in the runner, the feeding head sprue, or in the ladle before or during casting.
  • the nitrogen yield during its introduction into the steel is very high and remarkably regular for similar operating conditions.
  • the nitrogen yield in the steel was 81%.
  • Example 2 A killed steel was also nitrided to obtain a steel of the following composition:
  • the nitrogen yield in the steel was 89%.
  • a metal alloy consisting essentially of about 40.0- 90.0% by weight manganese, about 0.50-10.0% by weight aluminum, about 0.50-10.0% by weight nitrogen and up to 8% by weight carbon.
  • a metal alloy for nitriding steel consisting essentially of about-70.0-90.0% by weight manganese, about 2.04.0% by weight aluminum, about 4.06.0% by weight nitrogen, up to 3% by weight carbon, up to 2% by weight silicon and balance iron.
  • a method of nitriding steel comprising introducing into molten steel an alloy consisting essentially of about 40.0-90.0% by weight manganese, about 0.50-10.0% by weight aluminum, about 0.50-10.0% by weight nitrogen and up to 8% by weight carbon.
  • a method of nitriding steel comprising introducing into molten steel an alloy consisting essentially of 70.0- 90.0% by weight manganese, about 2.04.0% by weight aluminum, about 4.06.0% by weight nitrogen, up to 3% by weight carbon, up to 2% by weight silicon and balance iron.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
US425922A 1964-01-22 1965-01-15 Alloys for nitriding steel and method of nitriding steel Expired - Lifetime US3356493A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR961173A FR1391109A (fr) 1964-01-22 1964-01-22 Alliages nitrurés à l'aluminium

Publications (1)

Publication Number Publication Date
US3356493A true US3356493A (en) 1967-12-05

Family

ID=8821466

Family Applications (1)

Application Number Title Priority Date Filing Date
US425922A Expired - Lifetime US3356493A (en) 1964-01-22 1965-01-15 Alloys for nitriding steel and method of nitriding steel

Country Status (7)

Country Link
US (1) US3356493A (fr)
BE (1) BE658099A (fr)
DE (1) DE1238221B (fr)
ES (1) ES308236A1 (fr)
FR (1) FR1391109A (fr)
GB (1) GB1036502A (fr)
NL (1) NL6500494A (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4623402A (en) * 1980-01-25 1986-11-18 Nauchno-Issledovatelsky Institut Prikladnoi Matematiki Pri Tomskom Gosudarstvennov Universitete Metal composition and process for producing same
US4875933A (en) * 1988-07-08 1989-10-24 Famcy Steel Corporation Melting method for producing low chromium corrosion resistant and high damping capacity Fe-Mn-Al-C based alloys
CN104263876A (zh) * 2014-09-22 2015-01-07 山东钢铁股份有限公司 一种用于高强度钢生产的增氮增锰方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US415832A (en) * 1889-11-26 Manganese bronze and alloy of commerce
US2696433A (en) * 1951-01-11 1954-12-07 Armco Steel Corp Production of high nitrogen manganese alloy
US3304175A (en) * 1964-07-14 1967-02-14 Shieldalloy Corp Nitrogen-containing alloy and its preparation

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US415832A (en) * 1889-11-26 Manganese bronze and alloy of commerce
US2696433A (en) * 1951-01-11 1954-12-07 Armco Steel Corp Production of high nitrogen manganese alloy
US3304175A (en) * 1964-07-14 1967-02-14 Shieldalloy Corp Nitrogen-containing alloy and its preparation

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4623402A (en) * 1980-01-25 1986-11-18 Nauchno-Issledovatelsky Institut Prikladnoi Matematiki Pri Tomskom Gosudarstvennov Universitete Metal composition and process for producing same
US4875933A (en) * 1988-07-08 1989-10-24 Famcy Steel Corporation Melting method for producing low chromium corrosion resistant and high damping capacity Fe-Mn-Al-C based alloys
CN104263876A (zh) * 2014-09-22 2015-01-07 山东钢铁股份有限公司 一种用于高强度钢生产的增氮增锰方法
CN104263876B (zh) * 2014-09-22 2015-11-11 山东钢铁股份有限公司 一种用于高强度钢生产的增氮增锰方法

Also Published As

Publication number Publication date
GB1036502A (en) 1966-07-20
DE1238221B (de) 1967-04-06
FR1391109A (fr) 1965-03-05
NL6500494A (fr) 1965-07-23
ES308236A1 (es) 1965-04-16
BE658099A (fr) 1965-04-30

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