Super duplex stainless steel flux-cored wire

The invention belongs to the technology of welding materials and provides a super duplex stainless steel flux-cored wire. A common E304L-type stainless steel strip is adopted, and the width and the thickness of the steel strip are 10 mm and 0.4 mm respectively. A flux core is composed of, by weight, 35%-40% of metal chromium, 8%-11% of metal nickel, 11%-20% of metal molybdenum, 0%-2% of metal manganese, 5%-10% of manganese nitride, 15%-25% of titanium dioxide, 2%-4% of feldspar and 0.5%-2.5% of rare earth fluoride. The weight of flux core powder accounts for 25%-27% of the total weight of the wire. According to the flux-cored wire, carbon dioxide serves as welding protection gas, the wire is used for welding a 25Cr-class super duplex stainless steel structure, the ferrite ratio in a weld joint is 45%-55%, PREN is 41-43, and welding usability of the wire is excellent. 本发明属于焊接材料技术，提出的超级双相不锈钢药芯焊丝，其采用普通E304L型不锈钢钢带，钢带的宽度和厚度分别为10mm和0.4mm，药芯的组成和重量百分比为：金属铬35-40％，金属镍8-11％，金属钼11-20％，金属锰0-2％，氮化锰5-10％，二氧化钛15-25％，长石2-4％，稀