| 摘要 |
PROBLEM TO BE SOLVED: To provide a ferritic stainless steel wire for a boss-material having cold-forgeability, fusion-preventive performance, corrosion-resistance to a chloride ion and especially, grain-boundary corrosion-resistance in the welded part which are difficult to be achieved in a conventional ferritic stainless steel wire. SOLUTION: The ferritic stainless steel wire for boss-material, which can suppress the occurrence of grain-boundary corrosion in the welded part, is obtained by regulating Cr, Nb and Mo contents and Nb precipitated quantity so as to secure specific values with respect to the cold-forgeability and the seizure-preventing performance, and adding the proper quantities of Ti and Nb so as not to form Cr-lack layer along the grain-boundary caused by precipitation of Cr-carbide into the grain-boundary in the welding time with respect to the grain-boundary corrosion-resistance in the welded part, and further controlling to be satisfy (Ti+Nb)/(C+N)≥10. COPYRIGHT: (C)2011,JPO&INPIT
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