IN-PROCESS MEASUREMENT OF THE PRIMARY STO CK TEMPERATURE IN REHEATINGAND HEAT-TREATMENT FURNACES

Thermocouples can be attached to individual workpieces to determine th e course of temperature in the primary stock. They remain, as drag the rmocouples, with their cold ends outside the furnace at all times or a re connected to an electronic data storage unit which passes together with the stock through the furnace. If the other most important proces s parameters are registered at the same time and suitable analysis and graphics software is used, it is thus possible to make the influence of the various process parameters on the primary stock temperature tra nsparent. Although contactless techniques for continuously measuring t he primary stock surface temperature are successfully used in individu al cases, still further development work is necessary however until su ch techniques are suitable for full, universal industrial application.