Metal treatment – Compositions – Heat treating
Patent
1988-08-30
1990-02-20
Roy, Upendra
Metal treatment
Compositions
Heat treating
148 124, 148 127B, 148 18, 148 203, 148 206, 148133, C22F 118
Patent
active
049023551
ABSTRACT:
A method of manufacturing a titanium alloy, wherein a melted and possibly preformed part is annealed to set the starting grain structure, wherewith a first grain structure transformation is accomplished by a first cooling step, whereafter high dislocation densities are produced in the course of a hot forming step, whereupon heat treatment involving a recrystallization is carried out, wherewith in the course of a subsequent cooling a predominantly or substantially martensitic breakdown is achieved, wherewith a grain structure transformation is carried out in a subsequent annealing process, and wherewith in the course of a subsequent chilling a fine grain structure is set. At least the first cooling step is accomplished by spraying the preformed part with water and/or water-air mixtures. A spray device may be used for carrying out the method.
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Fladischer Johann
Jaffee Robert I.
Jager Heimo
Mayerhoffer Johann
Puschnik Herbert H.
Bohler Gesellschaft m.b.H.
Roy Upendra
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