Method for batchwise heat treatment of goods to be annealed

Details Method for batchwise heat treatment of goods to be annealed Method for batchwise heat treatment of goods to be annealed

2011-01-25

2011-01-25

King, Roy (Department: 1793)

Metallurgical apparatus

Process

C148S582000, C148S591000, C148S606000, C148S615000, C148S625000, C148S633000, C148S634000, C148S687000, C148S703000, C148S708000, C148S712000, C219S651000, C219S686000, C219S707000, C219S121330, C219S121510, C219S121550

Reexamination Certificate

active

07875235

ABSTRACT:
A method is described for batchwise heat treatment of goods to be annealed which are heated in a heating chamber after scavenging air with a scavenging gas under protective gas to a predetermined treatment temperature, with the protective gas being conveyed through the heating chamber depending on the occurrence of impurities in different quantities. In order to enable the economic use of protective gas, it is proposed that the protective gas which is withdrawn from the heating chamber after the main occurrence of impurities and which is loaded with a residual quantity of impurities is conveyed, optionally after intermediate storage, into the heating chamber during the main occurrence of impurities of a subsequent batch before non-loaded protective gas is introduced into the heating chamber.

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International Search Report.

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