STRESS CORROSION CRACKING RESISTANT AUSTENITIC MATERIAL AND ITS MANUFACTURE

摘要

PURPOSE: To provide method for surface modifying treatment improving the stress corrosion cracking resistance of the weld heat affected zone in a light- water reactor, particularly capable of withstanding corrosion caused by low temp. sensitization after modifying treatment and capable of preventing stress corrosion cracking in the period of operation. ;CONSTITUTION: The surface of an Fe or Ni base allay material is irradiated with a laser beam having 1.0 to 100J/mm irradiating energy density and is cooled at the cooling rate of 10³ to 10⁷°C/s to form a melted and solidified layer having a cell structure in which the average cell distance lies in the range of 0.1 to 3.0μm.;COPYRIGHT: (C)1993,JPO&Japio