C - Chemistry – Metallurgy – 21 – D
Patent
C - Chemistry, Metallurgy
21
D
148/36
C21D 1/00 (2006.01)
Patent
CA 1103133
ABSTRACT OF THE DISCLOSURE A isothermal transformation process or method is disclosed for heat treating metals of the class which is characterized by having a time-temperature-transformation, or T-T-T Diagram or Isothermal Transformation Diagram. The process includes the steps of heating the metal workpiece at a heating source or station to a temperature above the solution treating transform- ation or austenitizing temperature (Al) where the workpiece is formed into a homogeneous solid solution; thereafter encapsul- ating the workpiece in a generally closed container which main- tains the temperature of the workpiece above the aforesaid sol- ution treating transformation or austenitizing temperature dur- ing the period of time required to physically transport the container and the workpiece therein from the heating source or station to a cooling source or station; transporting the con- tainer with the workpiece therein to the cooling source or station; removing the workpiece from the container; and immed- iately inserting the workpiece which still has a temperature above the solution treating transformation or austenitizing temperature into a cooling source or station which thereafter performs the isothermal transformation of the workpiece and where the homogeneous solid solution is converted by cooling to the desired mixed solids.
297337
Frayne & Company Robert
Upton Industries Inc.
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