Method for heat treatment of high-toughness weld metals

Details Method for heat treatment of high-toughness weld metals Method for heat treatment of high-toughness weld metals

C - Chemistry, Metallurgy

21

D

148/47

C21D 9/50 (2006.01) B23K 35/30 (2006.01)

Patent

CA 1040986

ABSTRACT OF THE DISCLOSURE A method for obtaining a weld metal having excellent toughness at low temperatures as below -40°C, which method com- prises heating the weld metal having a specific steel composition to its austenitizing temperature and cooling it or holding it at the temperature not longer than 25 minutes then quenching and tempering it. In order to further improve the low temperature toughness the weld metal is reheated again from the Ac1 to Ac3 range. Excellent low temperature toughness of the weld metal can be obtained without necessity of using any special welding materials.

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