Wire for electroslag welding, flux for electroslag welding and welded joint

Patent metadata

Field	Value
Publication number	US-11577346-B2
Application number	US-201716332308-A
Country	US
Kind code	B2
Filing date	Sep 4, 2017
Priority date	Sep 13, 2016
Publication date	Feb 14, 2023
Grant date	Feb 14, 2023

Abstract

Disclosed herein is an electroslag welding wire containing, by mass % based on total mass of the wire: C: more than 0% and 0.07% or less; Si: more than 0% and 0.50% or less; Mn: more than 0% and 1.0% or less; Ni: 6.0 to 15.0%; and Fe: 79% or more. The electroslag welding wire satisfies the following relationship (1): 0.150≤C+Si/30+Mn/20+Ni/60≤0.300 (1).

First claim

The invention claimed is:

1. An electroslag welding wire, comprising, by mass % based on a total mass of the wire:
C: from more than 0% to 0.07%;
Si: from more than 0% to 0.50%;
Mn: from more than 0% to 1.0%;
Ni: from 6.0 to 15.0%; and
Fe: 79% or more,
wherein the electroslag welding wire satisfies the following relationship (1):
0.150≤C+(Si/30)+(Mn/20)+(Ni/60)≤0.300  (1),

wherein each of C, Si, Mn, and Ni in the relationship (1) represents a number corresponding to a content in mass % of each of C, Si, Mn, and Ni, wherein the units of mass % are omitted, based on the total mass of the wire;
wherein the wire is a flux cored wire comprising a slag forming agent in an amount of more than 0% to 15% based on the total mass of the wire;
the slag forming agent comprises at least one selected from the group consisting of SiO 2 , CaO, CaF 2 , BaF 2 , MgO, Al 2 O 3 , MnO, TiO 2 , ZrO 2 , FeO, Na 2 O, K 2 O, and BaO, and satisfies the following relationship (4):
(CaO+CaF 2 +BaF 2 +MgO+BaO+Na 2 O+K 2 O)/(SiO 2 +0.5(Al 2 O 3 +TiO 2 +ZrO 2 +MnO+FeO))≥1.00  (4); and

the left side of the relationship (4) is taken as >100 when the slag forming agent does not contain any of SiO 2 , Al 2 O 3 , TiO 2 , ZrO 2 , MnO and FeO;
wherein each of the components CaO, CaF 2 , BaF 2 , MgO, BaO, Na 2 O, K 2 O, SiO 2 , Al 2 O 3 , TiO 2 , ZrO 2 , MnO, and FeO in the relationship (4) represents a content in mass % of each component, wherein the units of mass % are omitted, based on the total mass of the wire.

2. An electroslag welding wire, comprising, by mass % based on a total mass of the wire:
C: from more than 0% to 0.07%;
Si: from more than 0% to 0.50%;
Mn: from more than 0% to 1.0%;
Ni: from 6.0 to 15.0%; and
Fe: 79% or more,
wherein the electroslag welding wire further comprises at least one element selected from the group consisting of Cu, Cr, Mo, W, Nb, V and B, and satisfies the following relationship (2):
0.150≤C+(Si/30)+(W/30)+(Mn/20)+(Cu/20)+(Ni/60)+(Cr/20)+(Mo/15)+(Nb/10)+(V/10)+(5×B)≤0.300  (2),

wherein each of C, Si, W, Mn, Cu, Ni, Cr, Mo, Nb, V, and B in the relationship (2) represents a number corresponding to a content in mass % of each of C, Si, W, Mn, Cu, Ni, Cr, Mo, Nb, V, and B, wherein the units of mass % are omitted, based on the total mass of the wire;
wherein the wire is a flux cored wire comprising a slag forming agent in an amount of from more than 0% to 15% based on the total mass of the wire;
the slag forming agent comprises at least one selected from the group consisting of SiO 2 , CaO, CaF 2 , BaF 2 , MgO, Al 2 O 3 , MnO, TiO 2 , ZrO 2 , FeO, Na 2 O, K 2 O, and BaO, and satisfies the following relationship (4):
(CaO+CaF 2 +BaF 2 +MgO+BaO+Na 2 O+K 2 O)/(SiO 2 +0.5(Al 2 O 3 +TiO 2 +ZrO 2 +MnO+FeO)≥1.00  (4); and

the left side of the relationship (4) is taken as >100 when the slag forming agent does not contain any of SiO 2 , Al 2 O 3 , TiO 2 , ZrO 2 , MnO and FeO;
wherein each of the components CaO, CaF 2 , BaF 2 , MgO, BaO, Na 2 O, K 2 O, SiO 2 , Al 2 O 3 , TiO 2 , ZrO 2 , MnO, and FeO in the relationship (4) represents a content in mass % of each component, wherein the units of mass % are omitted, based on the total mass of the wire.

3. The electroslag welding wire according to claim 1 , further comprising:
at least one element selected from the group consisting of Ca, Mg, REM, Zr, Al and Ti, and satisfying the following relationship (3):
0.001≤1.6(Ca+Mg)+1.25(REM+Zr)+Al+0.8Ti≤0.70  (3),

wherein each of Ca, Mg, REM, Zr, Al, and Ti in the relationship (3) represents a content in mass % of each of Ca, Mg, REM, Zr, Al, and Ti, wherein the units of mass % are omitted, based on the total mass of the wire.

4. The electroslag welding wire according to claim 1 , wherein the wire is a solid wire or a flux cored wire.

5. The electroslag welding wire according to claim 1 , wherein the wire has been plated with Cu.

6. A flux used for electroslag welding together with the electroslag welding wire according to claim 1 , the flux comprising, by mass %:
SiO 2 : 0 to 35%;
CaO: 5 to 60%;
CaF 2 : 3 to 50%;
BaF 2 : 0 to 20%;
MgO: 0 to 20%;
Al 2 O 3 : 0 to 65%;
MnO: 0 to 20%;
TiO 2 : 0 to 10%;
ZrO 2 : 0 to 10%;
FeO: 0 to 5%;
Na 2 O: 0 to 10%;
K 2 O: 0 to 10%; and
BaO: 0 to 20%, and
wherein:
the flux satisfies the following relationship (5):
(CaO+CaF 2 +BaF 2 +MgO+BaO+Na 2 O+K 2 O)/(SiO 2 +0.5(Al 2 O 3 +TiO 2 +ZrO 2 +MnO+FeO))≥1.00  (5); and

the left side of the relationship (5) is taken as >100 when the flux does not contain any of SiO 2 , Al 2 O 3 , TiO 2 , ZrO 2 , MnO and FeO,
wherein each of the components CaO, CaF 2 , BaF 2 , MgO, BaO, Na 2 O, K 2 O, SiO 2 , Al 2 O 3 , TiO 2 , ZrO 2 , MnO, and FeO in the relationship (5) represents a content in mass % of each component, wherein the units of mass % are omitted, based on the total mass of the flux.

7. A weld joint produced by electroslag welding using the electroslag welding wire according to claim 1 and a flux for electroslag welding, wherein:
a weld metal in the weld joint comprises, by mass %:
C: from more than 0% to 0.07%;
Si: from more than 0% to 0.50%;
Mn: from more than 0% to 1.0%;
Ni: from 6.0 to 15.0%; and
Fe and inevitable impurities;

the weld metal satisfies the following relationship (6):
0.150≤C+(Si/30)+(Mn/20)+(Ni/60)≤0.300  (6);

wherein each of C, Si, Mn, and Ni in the relationship (6) represents a number corresponding to a content in mass % of each of C, Si, Mn, and Ni, wherein the units of mass % are omitted, based on the total mass of the weld metal,
the flux for electroslag welding comprises:
SiO 2 : 0 to 35%;
CaO: 5 to 60%;
CaF 2 : 3 to 50%;
BaF 2 : 0 to 20%;
MgO: 0 to 20%;
Al 2 O 3 : 0 to 65%;
MnO: 0 to 20%;
TiO 2 : 0 to 10%;
ZrO 2 : 0 to 10%;
FeO: 0 to 5%;
Na 2 O: 0 to 10%;
K 2 O: 0 to 10%;
BaO: 0 to 20%;

the flux satisfies the following relationship (5):
(CaO+CaF 2 +BaF 2 +MgO+BaO+Na 2 O+K 2 O)/(SiO 2 +0.5(Al 2 O 3 +TiO 2 +ZrO 2 +MnO+FeO))≥1.00  (5); and

the left side of the relationship (5) is taken as >100 when the flux does not contain any of SiO 2 , Al 2 O 3 , TiO 2 , ZrO 2 , MnO and FeO,
wherein each of the components CaO, CaF 2 , BaF 2 , MgO, BaO, Na 2 O, K 2 O, SiO 2 , Al 2 O 3 , TiO 2 , ZrO 2 , MnO, and FeO in the relationship (5) represents a content in mass % of each component, wherein the units of mass % are omitted, based on the total mass of the flux.

8. A weld joint produced by electroslag welding using the electroslag welding wire according to claim 1 and a flux for electroslag welding, wherein:
a weld metal in the weld joint comprises, by mass %:
C: from more than 0% to 0.07%;
Si: from more than 0% to 0.50%;
Mn: from more than 0% to 1.0%;
Ni: from 6.0 to 15.0%;
at least one element selected from the group consisting of Cu, Cr, Mo, W, Nb, V and B; and
Fe and inevitable impurities;

the flux for electroslag welding comprises:
SiO 2 : 0 to 35%;
CaO: 5 to 60%;
CaF 2 : 3 to 50%;
BaF 2 : 0 to 20%;
MgO: 0 to 20%;
Al 2 O 3 : 0 to 65%;
MnO: 0 to 20%;
TiO 2 : 0 to 10%;
ZrO 2 : 0 to 10%;
FeO: 0 to 5%;
Na 2 O: 0 to 10%;
K 2 O: 0 to 10%;
BaO: 0 to 20%;

the flux satisfies the following relationship (5):
(CaO+CaF 2 +BaF 2 +MgO+BaO+Na 2 O+K 2 O)/(SiO 2 +0.5(Al 2 O 3 +TiO 2 +ZrO 2 +MnO+FeO))≥1.00  (5);

the left side of the relationship (5) is taken as >100 when the flux does not contain any of SiO 2 , Al 2 O 3 , TiO 2 , ZrO 2 , MnO and FeO;
wherein each of the components CaO, CaF 2 , BaF 2 , MgO, BaO, Na 2 O, K 2 O, SiO 2 , Al 2 O 3 , TiO 2 , ZrO 2 , MnO, and FeO in the relationship (5) represents a content in mass % of each component, wherein the units of mass % are omitted, based on the total mass o

Assignees

• Kobe Steel Ltd

Inventors

• Ishizaki Keito
• Yuan Yimin
• Nako Hidenori
• Sugimura Tomoko
• Okazaki Yoshitomi

Classifications

• C22C38/40

  with nickel · CPC title

• B23K35/3607

  Silica or silicates · CPC title

• C22C38/46

  with vanadium · CPC title

• B23K35/361

  Alumina or aluminates · CPC title

• B23K35/362 Primary

  Selection of compositions of fluxes (B23K35/365, B23K35/368 take precedence) · CPC title