Hybrid electroslag cladding

Patent metadata

Field	Value
Publication number	US-2018178317-A1
Application number	US-201515737689-A
Country	US
Kind code	A1
Filing date	Nov 26, 2015
Priority date	Jun 19, 2015
Publication date	Jun 28, 2018
Grant date	—

Abstract

The invention relates to a hybrid electroslag cladding method, comprising: providing a workpiece ( 6 ) to be cladded; guiding a strip electrode ( 4 ) onto the surface of the workpiece ( 6 ); cladding the strip electrode ( 4 ) onto the surface of the workpiece ( 6 ) using electroslag cladding; guiding a metal cored hybrid electroslag cladding wire ( 7 ) into the weld puddle ( 9 ) of the strip electrode ( 4 ) for controlling the chemical composition of the cladding. The invention further relates to hybrid electroslag cladding systems and wires.

First claim

1 . A hybrid electroslag cladding method, the method comprising:
providing a workpiece to be cladded; guiding a strip electrode onto the surface of the workpiece; cladding the strip electrode onto the surface of the workpiece using electroslag cladding; and guiding a metal cored hybrid electroslag cladding wire into a weld puddle of the strip electrode for controlling a chemical composition of the cladding.

2 . The method of claim 1 , wherein for a workpiece requiring nickel cladding, the metal cored hybrid electroslag cladding wire has a composition that is defined by one of WIRE 625, WIRE 600, WIRE 825, WIRE 400, WIRE 308L, WIRE 347, WIRE 316L, or WIRE 317L.

3 . The method of claim 1 , further comprising:
for a second workpiece requiring stainless steel cladding with a different cladding composition than the workpiece, selecting a second metal cored hybrid electroslag cladding wire for controlling a chemical composition of the cladding of the second workpiece, wherein the chemical composition of the metal cored hybrid electroslag cladding wire differs from the chemical composition of the second metal cored hybrid electroslag cladding wire.

4 . The method of claim 3 , further comprising:
using a flux of a given composition for the workpiece and the second workpiece.

5 . The method of claim 1 , further comprising:
controlling at least one of a stickout length of the metal cored hybrid electroslag cladding wire, a feed speed of the strip electrode, and a feed speed of the metal cored hybrid electroslag cladding wire.

6 . The method of claim 5 , wherein the feed speed of the metal cored hybrid electroslag cladding wire is changed if a change of the feed speed of the strip electrode is detected.

7 . The method of claim 1 , wherein the metal cored hybrid electroslag cladding wire is heated.

8 . The method of claim 1 , wherein the metal cored hybrid electroslag cladding wire includes a Ni—Cr nickel base sheath and a metal powder flux within the Ni—Cr nickel base sheath, and
wherein the wire has a composition that is defined by WIRE 625, WIRE 600, WIRE 825, or WIRE 400.

9 . The method of claim 1 , wherein the metal cored hybrid electroslag cladding wire includes a stainless steel base sheath and a metal powder flux within the stainless steel base sheath, and
wherein the wire has a composition that is defined by WIRE 308L, WIRE 347, WIRE 316L, or WIRE 317L.

10 . The method of claim 8 , wherein for the metal cored hybrid electroslag welding wire an upper limit of at least one element in the composition is one of 5%, 10% or 20% lower than that defined in the respective WIRE 625, WIRE 600, WIRE 825, or WIRE 400.

11 . The method of claim 8 , wherein for the metal cored hybrid electroslag welding wire a lower limit of at least one element in the composition is one of 5%, 10% or 20% higher than that defined in the respective WIRE 625, WIRE 600, WIRE 825, or WIRE 400.

12 . (canceled)

13 . A hybrid electroslag cladding system, comprising:
a cladding head for guiding a strip electrode onto a surface of a workpiece to be cladded with the strip electrode; a cladding power supply for providing power to the strip electrode for arcless deposition onto the surface of the workpiece; and a flux feeder for at least one of depositing flux on the strip electrode and depositing flux adjacent the strip electrode, wherein the cladding head is configured to guide a metal cored hybrid electroslag cladding wire into the weld puddle of the strip electrode, wherein the metal cored hybrid electroslag cladding wire has a composition that is defined by one of WIRE 625, WIRE 600, WIRE 825, WIRE 400, WIRE 308L, WIRE 347, WIRE 316L, or WIRE 317L.

14 . The system of claim 13 , further comprising:
a hot wire power supply for heating the metal cored hybrid electroslag cladding wire; and a controller for controlling at least one of a temperature of the metal cored hybrid electroslag cladding wire according to a desired deposition rate, a stickout length of at least one of the metal cored hybrid electroslag cladding wire the and the strip electrode, a feed speed of the strip electrode, and a feed speed of the metal cored hybrid electroslag cladding wire.

15 . The system of claim 13 , further comprising:
a steering magnet disposed adjacent the strip electrode for steering the weld puddle magnetically.

16 . The system of claim 13 , wherein an angle between at least one of the strip electrode and the metal cored hybrid electroslag cladding wire and the surface of the workpiece is adjustable.

17 . The system of claim 13 , wherein the cladding head guides at least two metal cored hybrid electroslag cladding wires disposed adjacent to each other into the weld puddle.

18 . The method of claim 9 , wherein for the metal cored hybrid electroslag welding wire an upper limit of at least one element in the composition is one of 5%, 10% or 20% lower than that defined in the respective WIRE 308L, WIRE 347, WIRE 316L, or WIRE 317L.

19 . The method of claim 9 , wherein for the metal cored hybrid electroslag welding wire a lower limit of at least one element in the composition is one of 5%, 10% or 20% higher than that defined in the respective WIRE 308L, WIRE 347, WIRE 316L, or WIRE 317L.

Assignees

• Lincoln Global Inc

Inventors

• Nateghi Amin
• Pollmann Roland
• Bolte Frank
• Thume Christopher
• Golding Mark
• Zhang Zhuyao
• Chattopadhyay Pallav

Classifications

• C22C38/50

  with titanium or zirconium · CPC title

• B23K35/3086

  containing Ni or Mn · CPC title

• B23K35/0266

  flux-cored · CPC title

• B23K25/005 Primary

  Welding for purposes other than joining, e.g. build-up welding · CPC title

• C22C38/02

  containing silicon · CPC title