caa a22 4500 465811973 CHVBK 20180323112118.0 cr unu---uuuuu 170327e19900301xx s 000 0 eng 10.1007/BF02833062 doi (NATIONALLICENCE)springer-10.1007/BF02833062 Schmidt Michael Tool and Alloy R&D with Carpenter Technology Corp., P.O. Box 14662, 19612-4662, Reading, PA aut Preoxidation prior to gas carburizing: Theory and its effect on pyrowear ® 53 alloy [Elektronische Daten] [Michael Schmidt] The absorption of carbon during gas carburizing of steel components is reviewed based on thermodynamic and kinetic considerations. The effects of chromium and silicon on carbon absorption are reviewed based on the thermodynamics of passive film formation in the presence of a carburizing gas. Finally, the merits associated with the use of preoxidation treatments prior to gas carburizing are discussed and the results of an in-depth analysis performed on carbon absorption in Pyrowear®1 53 alloy are presented based on preoxidation temperature. Maximum carbon absorption was observed when using a preoxidation temperature of approximately 700/927° C (1292/1700° F) prior to carburizing Pyrowear 53 alloy at 927° C (1700° F) for 7.5 hr at a carbon potential of 1.16-1.19 using a 40% N2, 40% H2, and 20% CO endothermic carrier gas and vaporized methanol. This effect is believed to be related to the thickness of the oxide layer and to the roughness of the oxide/metal interface. Springer-Verlag New York Inc, 1990 Journal of Heat Treating Springer-Verlag 8/1(1990-03-01), 5-19 0190-9177 8:1<5 1990 8 136 https://doi.org/10.1007/BF02833062 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02833062 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Schmidt Michael Tool and Alloy R&D with Carpenter Technology Corp., P.O. Box 14662, 19612-4662, Reading, PA aut NATIONALLICENCE 773 0- Journal of Heat Treating Springer-Verlag 8/1(1990-03-01), 5-19 0190-9177 8:1<5 1990 8 136 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer