High nitrogen flux cored welding wire for Cr-Ni type stainless steel
AssigneeKabushiki Kaisha Kobe Seiko Sho
InventorsTsuneshi Ogawa, Toshiharu Maruyama, Shigeki Nishiyama, Shintaro Ozaki
Life of this patent
Estimating the term…
Abstract
A high nitrogen flux cored wire for welding of Cr--Ni type stainless steel is formed by filling a flux into a sheath of stainless steel. The flux is composed of N and nitrogen compound (total converted value of N): 0.05 to 0.30 wt % with respect to total weight of wire, in the sheath and the flux; and TiO.sub.2 : 4.0 to 8.0 wt %, SiO.sub.2 : 0.3 to 3.0 wt %, Al.sub.2 O.sub.3 : 0.05 to 1.5 wt %, metal fluoride (converted value of F): 0.05 to 0.7 wt %, ZrO.sub.2 : less 0.5 wt %, and metal carbonate: less than or equal to 1.0 wt % with respect to total weight of the wire, in said flux.
Claims20
A high nitrogen flux cored wire for welding of Cr--Ni type-stainless steel, which is formed by filling a flux into a sheath of stainless steel, consisting essentially of:
- N (converted value of N):
- 0.05 to 0.30 wt % with respect to total weight of the wire in the sheath and the flux;
- and
- TiO.sub.2 :
- 4.0 to 8.0 wt %, SiO.sub.2 :
- 0.3 to 3.0 wt %, Al.sub.2 O.sub.3 :
- 0.05 to 1.5 wt %, metal fluoride (converted value of F):
- 0.05 to 0.7 wt %, ZrO.sub.2 :
- less than 0.5 wt %, and metal carbonate:
- less than or equal to 1.0 wt % with respect to total weight of the wire, in said flux.
A high nitrogen flux cored wire for welding of Cr--Ni type stainless steel, which is formed by filling a flux into a sheath of stainless steel, consisting essentially of:
- N (converted value of N):
- 0.05 to 0.30 wt % with respect to total weight of the wire in the sheath and the flux;
- and
- TiO.sub.2 :
- 4.0 to 8.0 wt %, SiO.sub.2 :
- 0.3 to 3.0 wt %, Al.sub.2 O.sub.3 :
- 0.05 to 1.5 wt %, and metal fluoride (converted value of F):
- 0.05 to 0.7 wt %, and as inevitable impurity, ZrO.sub.2 being restricted to less than 0.5 wt %, and metal carbonate to less than or equal to 1.0 wt % with respect to total weight of the wire, in said flux.
A flux cored wire, comprising a stainless steel sheath and a flux,
- said flux comprising TiO.sub.2 :
- 4.0 to 8.0 wt %, SiO.sub.2 :
- 0.3 to 3.0 wt %, Al.sub.2 O.sub.3 :
- 0.05 to 1.5 wt %, metal fluoride (converted value of F):
- 0.05 to 0.7 wt %, ZrO.sub.2 :
- less than 0.5 wt %, and metal carbonate:
- less than or equal to 1.0 wt % with respect to total weight of the wire,
- wherein said flux cored wire comprises N (converted value of N):
- 0.05 to 0.30 wt % with respect to total weight of the flux cored wire.
Dependencies are inferred from the claim text.