High chromium martensitic weld metal with excellent cracking resistance, abrasion resistance and corrosion resistance, open arc welding method for obtaining such weld metal and flux filling wire used therein

摘要

The present invention is to improve the hardening performance and thermal crack resistance or corrosion resistance of the high chromium martensite-based welding metal in weight% C: 0.02% to 0.5%, Mn: 0.5 to 5.0%, Si: 0.3 to 1.5%, Cr: 4 ~ 16%, Mo: 0.4 ~ 2.0%, Ni: 0.5 ~ 5.0%, N: 0.05 ~ 0.25%, Fe: The rest is composed of high chromium, high chromium, excellent wear resistance and corrosion resistance Martensitic weld metal and weight% C: 0.2 ~ 1%, Mn: 6 ~ 14%, Si: 3 ~ 10%, Cr: 30 ~ 45%, Mo: 0.5 ~ 2%, Ni: 3 ~ 10% , SiO ₂ : 2 ~ 6%, TiO ₂ : 2 ~ 6%, Al ₂ O ₃ : 2 ~ 4%, Fe: wear resistance, heat cracking resistance, resistance characterized in that the composition consists of the filling flux The open arc welding method and the shielding gas containing nitrogen are used by welding the corrosive flux filling wire and the flux filling wire in an arc in the air without supplying the shielding gas, and the nitrogen in the atmosphere is fused to the deposited metal. By arc welding .