HEAT-TREATING METHOD

摘要

OF INVENTION Methods for modifying the temperatures at which metallic o compositions capable of undergoing reversible transformation from the austenitic state to the martensitic state will undergo such transformation and a method for inhibiting the loss of such reversibility are disclosed. The method for inhibiting loss of reversibility between the martensitic and austenitic state comprises holding a metallic composition which is in the austenitic state at a temperature above the temperature at which transformation to the martensitic state starts for a time sufficient to reduce the loss of reversibility. Articles made form the compositions may be used as couplings for hydraulic lines.