| 摘要 |
<p>A welding material for stainless steels which provides a welding metal having excellent corrosion resistance and mechanical properties without defect in the wearable electrode-type welding or in the nonwearable-type welding of all position, facilitating the machining for forming wires. The welding material is a composite wire comprising an outer formation of a steel and a filler without slag-forming agent packaged inside the outer formation. The wire as a whole has the following chemical composition (% by weight): C: 0.03 % or less, Si: 1.0 % or less, Mn: 1.5 % or less, P: 0.04 % or less, S: 0.01 % or less, Al: 0.5 % or less, Ni: 8.0 to 10.0%, Cr: 22.0 to 26.0 %, Mo: 2.0 to 5.0 %, N: 0.12 to 0.24 %, Co: 3.0 % or less, W: 5.0 % or less, Cu: 2.0 % or less, V: 1.50 % or less, the remainder being Fe and unavoidable impurities. The welding material has an anti-pitting index PREW represented by the following formula (1): PREW = Cr + 3.3 (Mo + 0.5W) + 16N of not smaller than 42.0 and a ferrite capacity index Ph represented by the following formula (2): Ph = Ni + 30(C + N) - 0.6(Cr + 1.5Si + Mo + 0.4W) + 5.6/Cr + 1.5Si + Mo + 0.4W - 6 of 0.12 to 0.25.</p> |
