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
• • 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
  • C22C35/00—Master alloys for iron or steel
  • C22C35/005—Master alloys for iron or steel based on iron, e.g. ferro-alloys

Definitions

• This invention relates to a composition of alloycontainingvanadium as the major con-.
• vanadium is added in the furnace, although part of the vanadium, especially material in finely divided state, isgenerally added in the ladle. It is well-known in steel making practice that the less the total amount of cold material added in the ladle the better and more uniform are the ingots obtained from pouring such steel.
• the cold material introduced into the ladle absorbs heat in the process of melting and dissolving in the molten bath and consequently reduces the ladle temperature, thus creating the danger of pouring the steelinto the molds at a lower temperature than that requisite for the production of sound ingots.
• the oxides. present therein will effectually burn up some of the vanadium content of the ferro-Vanadium added.
• the steel is deoxidized prior to-addition of ferro-vanadium by means of silicon metal or alloys, or aluminum, or both.
• impurities such as sulphur and phosphorus
• impurities were introduced into the molten steel, such impurities being proportionate to the amount of cold iron present and beingderived from the scrap iron used in the manufacture of the separate ferro alloys. If, therefore, twp or' three separate alloys were added, each with the same percentages of objectionable impurities as in the alloy of my invention, it is easy to see that the impurities in the steel will accumulatetotwo or threefold extent.
• ferro alloys containing high percentages of silicon and aluminum show a very much less carbon content and' prevent the formation of carbides than if this silicon and aluminum content were absent.
• a vanadium alloy thereforp containing percentages of aluminum and silicon incorporated in the alloy will carry correspondingly less carbides.
• the vanadium content of the alloy will be protected against lossby oxidation by the aluminum and silicon present, since the aluminum and silicon are more readily oxidizable than the vanadium.
• a Vanadium alloy containing aluminum and silicon can be produced with practicably negligible quantities of iron, so that such 5 an alloy can be utilized for introducing vanadium into non-ferrous metals such as the various aluminum alloys and bronzes. It can also be used in other non-ferrous metals where the presence of iron would be detrimental but that of'silicon or aluminum would not be objectionable.
• the alloy of my invention containin approximately from 40% to 90% vana ium, from 3% to 15% aluminum, and from 5% to 30% silicon, with less than 50% carbon,
• a suitable reducing agent such as silicon.
• a suitable reducing agent such as silicon.
• the advantage of the alumino-thermic reduction is the facility of obtaining these alloys with practicallyno carbon contamination, which is more diflicult to achievein an electric furnace reduction.
• a vanadium alloy contammg about 40% to 90% vanadium, about 3% ,to 15% aluminum, and about 5% to 30% silicomand containing less than .5% carbon, the remainder principally iron.

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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)

Priority Applications (2)

Applications Claiming Priority (1)

Publications (1)

Family

ID=22952093

Family Applications (1)

Country Status (2)

Cited By (8)

• 1928
  • 1928-02-02 US US251467A patent/US1727180A/en not_active Expired - Lifetime
• 1929
  • 1929-01-08 FR FR667068D patent/FR667068A/fr not_active Expired

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