Metal treatment – Compositions – Heat treating
Patent
1989-07-10
1991-02-12
Dean, R.
Metal treatment
Compositions
Heat treating
148153, C21D 178
Patent
active
049921126
ABSTRACT:
Annealing and quenching method and apparatus for the implementation of the method. An annealing and quenching method for materials or parts referred to as a charge that is finish-annealed in a vacuum annealing plant and that then proceeds into a sluice chamber fashioned a full-pipe. An intermediate deposit of the charge occurs in this sluice chamber. After the intermediate deposit, a first sluice valve that is located between the chamber for the annealing furnace and the sluice chamber is closed. A second sluice valve that is located between the sluice chamber and a quenching container is subsequently opened. Movable brackets for the intermediate deposit of the charge are retracted, so that the charge falls through the second sluice valve into a quenching medium in the quenching container. It can be additionally provided that the pressure differential between the sluice chamber that is under a vacuum before the second sluice valve is opened and the quenching container is utilized before the dropping of the charge. Due to the pressure differential, quenching medium is suctioned out of the quenching container into the sluice chamber when the second sluice valve is opened. The medium comes into contact with the charge. A two-stage quenching process is advantageously achieved. The time from finished annealing up to the cooling bath and the fall path is considerably shortened.
Dean R.
Leybold Aktiengesellschaft
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