Patent ID: 7982165

Claim:
A system for heat treating a metal product comprising an annealing zone having a first preselected atmosphere condition, a cooling zone having a second preselected atmosphere condition different than the first preselected atmosphere condition, a blueing zone having a third preselected atmosphere condition different than the first and second preselected atmosphere conditions, and a graphical user interface including a control for selecting one of the annealing zone, the cooling zone, and blueing zone, a display for showing processing information pertaining to the selected one of the zones, the processing information including a computed ratio of gaseous hydrogen H 2 (g) to water vapor H 2 O (g) for the respective preselected atmosphere condition computed as a function of a first electrical input provided by an oxygen sensor located in contact with the respective preselected gas atmosphere condition and a second electrical input provided by a temperature sensor located in contact with the respective preselected gas atmosphere condition, and a control for controlling the respective preselected atmosphere condition based, at least in part, upon the computed ratio.