US 10,870,178 B2 · Flux-cored wire for arc welding of duplex stainless steel and weld metal

Abstract

A flux-cored wire for arc welding of a duplex stainless steel includes a stainless-steel sheath filled with a flux and contains, with respect to the total mass of the wire, predetermined amounts of Cr, Ni, Mo, N, Mn, and Si, in which letting a Ti alloy content in terms of Ti be [Ti] and letting an Al alloy content in terms of Al be [Al], [Ti] and [Al] are predetermined values, and in which parameter A expressed as A=[Ti]+2×[Al] satisfies a predetermined value, and the balance is composed of Fe, a slag-forming component, and incidental impurities.

Claims19

Dependent claims

A flux-cored wire, comprising, with respect to a total mass of the wire:

21.0% to 27.0% by mass Cr;
7.0% to 11.0% by mass Ni;
2.0% to 4.0% by mass Mo;
0.08% to 0.25% by mass N;
0.1% to 2.5% by mass Mn;
0.1% to 1.0% by mass Si;
0.3% to 0.8% by mass of a Ti alloy in terms of Ti, a Ti alloy content in terms of Ti being expressed as [Ti];
0.07% to 0.35% by mass of an Al alloy in terms of Al, an Al alloy content in terms of Al being expressed as [Al];
and
the balance being Fe, a slag-forming component, and incidental impurities,
wherein parameter A expressed as A=[Ti]+2×[Al] satisfies 0.6 to 1.20.

8 more elements

Dependencies are inferred from the claim text.

Facts

Application

15/398,357Filed 4 Jan 2017

Priority

JP 2016-03148122 Feb 2016

Published

US 2017/0239758 A124 Aug 2017

Granted

22 Dec 2020

Term ends

Not estimatedThe source records don’t support an estimate.

Classification20 codes

B23K 35/0266
Rods, electrodes or wires: flux-cored
B23K 9/00
Arc welding or cutting
B23K 35/308
Fe as the principal constituent: with Cr as next major constituent
B23K 35/3086
With Cr as next major constituent: containing Ni or Mn

Flux-cored wire for arc welding of duplex stainless steel and weld metal

Life of this patent

Flux-cored wire for arc welding of duplex stainless steel and weld metal

Life of this patent

Abstract

Claims19