（Falk Steuerungssysteme GmbH，德国 施塔特哈根31655；ThyssenKrupp Steel Europe AG，德国 多特蒙得44145；德国亚琛工业大学，铁基冶金研究部门，德国亚琛52072）
Measurements of gas phase reactions at steel surfaces
FALK Heinz，FALK Martin
Falk Steuerungssysteme GmbH，Stadthagen 31655, Germany；ThyssenKrupp Steel Europe AG，Dortmund 44145, Germany；HRWTH Aachen, University Department of Ferrous Metallurgy, Aachen 52072, Germany）
Abstract：The reactions taking place in the annealing atmosphere of a furnace simulator can be monitored with the help of a mass spectrometer probe positioned near to the steel surface［13］. The concentrations of water vapor and hydrogen near to the steel surface during the thermal cycle within the furnace are of particular interest, since they are changing as a result of the interaction with the alloying elements oxides on the steel sheet as well as those near to the surface. The concentrations of H2O, H2, CO, CO2, NH3 and N have been measured via the mass spectrometer probe for studying the oxidation, reduction, decarburization and nitriding processes. After the thermal treatment the concentration distributions of the relevant elements determined by GDOES within the surface near layer could be correlated to the measurements results of the gaseous species concentrations. These data allow controlling the surface conditions during the continuous annealing part of a hot dip galvanizing line by insitu measurements and also a description of the metallurgical behavior of steel grades differing in their alloying concepts.
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