C - Chemistry – Metallurgy – 23 – C
Patent
C - Chemistry, Metallurgy
23
C
148/43
C23C 8/22 (2006.01)
Patent
CA 1140438
ABSTRACT A process for carburizing steel in a furnace, using an atmosphere derived initially from decomposition of an oxygenated hydrocarbon containing up to three carbon atoms having a carbon to oxygen ratio of from 1 to 2 such as alcohols, aldehydes, ethers, esters and mixtures thereof injected into the furnace until the initial rapid stage of carburization is completed; then blending nitrogen into the oxygenated hydrocarbon atmosphere throughout the remainder of the process so as to minimize energy usage; and continually adjusting the carbon potential by addition of a hydrocarbon enriching or carburizing agent to maintain carbon potential of the furnace atmosphere within the desired limits during the entire carburizing cycle.
375786
Kaspersma Jelle H.
Peartree Robert J.
Air Products And Chemicals Inc.
Mcfadden Fincham
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