Method and apparatus for the heat treatment of hot-formed upper and lower straps

摘要

To increase the strength of upper and lower straps 2, 1 and thus save material, upper and lower straps 2, 1 are, after hot shaping, guided past quenching nozzles 10 and the heat of the straps 2, 1 is reduced to a temperature range of the medium to lower intermediate stage of the time-temperature-transformation curve. The straps 1, 2 are then exposed, in a cooling-air section 16, to a moderate heat dissipation when passing through the remaining transformation range of the intermediate stage, and thereafter brought to handling temperature in a dipping 18. <IMAGE>