BAND BUILDDUP WELDING LINER OF NBBCONTAINED AUSTENITE BASE STAINLESS STEEL

摘要

PURPOSE:To enable high temperature cracking to be inhibited by performing band build-up welding of the captioned steel on the inside surface of a pressure vessel or the like by using the deposited metal containing the respectively specific amounts of C, Si, Mn, Ni, Cr, Nb and Mo and the rest Fe and unavoidable impurities. CONSTITUTION:The captioned steel as a liner is subjected to band build-up welding through submerged arc welding using strip form electrode by using the deposited metal containing C = 0.08%, Si = 0.9%, Mn; 1.5 to 2.5%, Ni; 8.5 to 11%, Cr; 17.5 to 21% and Nb; 0.3 to 1% and further containing Mo of the 0.7 to 1.5% amount of the Nb content and the rest Fe and unavoidable impurities. This method inhibits the high temperature cracking at the build-up welding of the Nb-contained austenite base stainless steel applied to the inside surface of pressure vessels for atomic industry and chemical industry.