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  2. Reducing atmosphere - Wikipedia

    en.wikipedia.org/wiki/Reducing_atmosphere

    In metal processing, a reducing atmosphere is used in annealing ovens for relaxation of metal stresses without corroding the metal. A non-oxidizing gas, usually nitrogen or argon, is typically used as a carrier gas so that diluted amounts of reducing gases may be used.

  3. Saggar - Wikipedia

    en.wikipedia.org/wiki/Saggar

    In this use saggars are used to create a localised reducing atmosphere, [18] or concentrate the effects of salts, metal oxides and other materials on the surface of their ware. [19] Some pots may be carefully prepared for saggar firing.

  4. Substitution of dangerous chemicals - Wikipedia

    en.wikipedia.org/wiki/Substitution_of_dangerous...

    In metal degreasing: from vapor degreasing with trichloroethylene to high pressure hosing with hot alkaline solution in a closed system, In brazing: from fluxes containing boron and fluorine compounds to use of a furnace with reducing atmosphere, A new process:

  5. Brazing - Wikipedia

    en.wikipedia.org/wiki/Brazing

    In brazing copper, a reducing atmosphere (or even a reducing flame) may react with the oxygen residues in the metal, which are present as cuprous oxide inclusions, and cause hydrogen embrittlement. The hydrogen present in the flame or atmosphere at high temperature reacts with the oxide, yielding metallic copper and water vapour, steam.

  6. Decarburization - Wikipedia

    en.wikipedia.org/wiki/Decarburization

    Electrical steel is one material that uses decarburization in its production. To prevent the atmospheric gases from reacting with the metal itself, electrical steel is annealed in an atmosphere of nitrogen, hydrogen, and water vapor, where oxidation of the iron is specifically prevented by the proportions of hydrogen and water vapor so that the only reacting substance is carbon being oxidized ...

  7. Reducing agent - Wikipedia

    en.wikipedia.org/wiki/Reducing_agent

    Reducing agents can be ranked by increasing strength by ranking their reduction potentials. Reducers donate electrons to (that is, "reduce") oxidizing agents, which are said to "be reduced by" the reducer. The reducing agent is stronger when it has a more negative reduction potential and weaker when it has a more positive reduction potential.

  8. Powder metallurgy - Wikipedia

    en.wikipedia.org/wiki/Powder_metallurgy

    Iron powder is commonly used for sintering. Powder metallurgy (PM) is a term covering a wide range of ways in which materials or components are made from metal powders.PM processes are sometimes used to reduce or eliminate the need for subtractive processes in manufacturing, lowering material losses and reducing the cost of the final product. [1]

  9. Shielding gas - Wikipedia

    en.wikipedia.org/wiki/Shielding_gas

    Shielding gases fall into two categories—inert or semi-inert. Only two of the noble gases, helium and argon, are cost effective enough to be used in welding.These inert gases are used in gas tungsten arc welding, and also in gas metal arc welding for the welding of non-ferrous metals.