Electron beam welding method of high strength and toughness steel with excellent impact toughness

摘要

The present invention relates to a welding method of a 9% Ni thick steel plate, and an object thereof is to provide an electron beam welding method of a 9% Ni steel having excellent impact toughness.;In order to solve the above object, the present invention provides a method of welding a 9% Ni thick steel plate, wherein the groove is processed at least one or more positions among 1/2 or 2/3 thicknesses of the thick plate, The technical gist of the present invention relates to an electron beam welding method of excellent impact toughness 9% Ni steel, characterized by inserting pure Ni wire.