Metal treatment – Process of modifying or maintaining internal physical... – Chemical-heat removing or burning of metal
Patent
1975-06-30
1976-08-03
Steiner, Arthur J.
Metal treatment
Process of modifying or maintaining internal physical...
Chemical-heat removing or burning of metal
148153, 266130, C21D 100
Patent
active
039727513
ABSTRACT:
A novel method of and apparatus for automatically heat treating ferrous work rapidly from austenite stage temperature through the martensite stage and automaticaally slowly cooling the same thereafter to impart uniform hardness and other desired characteristics thereto, eliminating risk of warpage, cracking, distortion and variations therein. The invention includes a work holder within which the work is positioned during the automatic heat treating procedures, the work holder being provided with an upstanding vertical perforated wall such that, on positioning the work holder and work, after being preheated in a furnace, into the quenching medium, the work will be automatically quenched and cooled through the rapidly cooling initial and subsequent slow cooling time and temperature stages, achieving uniform transformation and hardness of work having varying forms and thicknesses to the martensitic transformation stage.
REFERENCES:
patent: 2621912 (1952-12-01), Lyon
patent: 2862843 (1958-12-01), Engelhard
patent: 3415694 (1968-12-01), Engelhard
Owego Heat Treat, Inc.
Steiner Arthur J.
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