Structure and properties of carbon steel to duplex stainless steel submerged arc welds

N.A. McPherson, K. Chi, M.S. McLean, T.N. Baker

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

Submerged arc welding (SAW) of stainless steel to carbon steel plate can produce a number of quality problems. Lack of control of the consumable wire position within the weld preparation can lead to uneven dilution from the parent plates. In addition a relatively heavy but equal dilution from both parent plates will also create problems. In the situation of SAW of duplex stainless steel to carbon steel with a Y weld preparation, which had a 4 mm nose on it, an undesirable situation was created, in which hard zones in the weld metal were observed. In addition, it was found that a bias of the electrode wire to the carbon steel side of the weld preparation created a situation where excessively high hardness measurements occurred (> 600 HV10). Those specific regions were found to contain martensite, which was positively identified using selected area electron diffraction in a TEM investigation on thin foils taken from the high hardness region. A V weld preparation with central positioning of the consumable resulted in acceptable hardness levels in the root region combined with a skeletal ferrite microstructure. This allowed the dilution in the root area to be reduced, whilst achieving a balanced parent plate dilution in the remainder of the weld from the SAW process.
LanguageEnglish
Pages219-226
Number of pages7
JournalMaterials Science and Technology
Volume19
Issue number2
DOIs
Publication statusPublished - Feb 2003

Fingerprint

Stainless Steel
carbon steels
arc welding
Carbon steel
dilution
stainless steels
Welds
Stainless steel
arcs
Submerged arc welding
preparation
Dilution
hardness
Hardness
wire
martensite
Wire
positioning
ferrites
foils

Keywords

  • carbon steel
  • stainless steel
  • submerged arc welds
  • arc welds
  • materials science
  • technology

Cite this

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title = "Structure and properties of carbon steel to duplex stainless steel submerged arc welds",
abstract = "Submerged arc welding (SAW) of stainless steel to carbon steel plate can produce a number of quality problems. Lack of control of the consumable wire position within the weld preparation can lead to uneven dilution from the parent plates. In addition a relatively heavy but equal dilution from both parent plates will also create problems. In the situation of SAW of duplex stainless steel to carbon steel with a Y weld preparation, which had a 4 mm nose on it, an undesirable situation was created, in which hard zones in the weld metal were observed. In addition, it was found that a bias of the electrode wire to the carbon steel side of the weld preparation created a situation where excessively high hardness measurements occurred (> 600 HV10). Those specific regions were found to contain martensite, which was positively identified using selected area electron diffraction in a TEM investigation on thin foils taken from the high hardness region. A V weld preparation with central positioning of the consumable resulted in acceptable hardness levels in the root region combined with a skeletal ferrite microstructure. This allowed the dilution in the root area to be reduced, whilst achieving a balanced parent plate dilution in the remainder of the weld from the SAW process.",
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Structure and properties of carbon steel to duplex stainless steel submerged arc welds. / McPherson, N.A.; Chi, K.; McLean, M.S.; Baker, T.N.

In: Materials Science and Technology, Vol. 19, No. 2, 02.2003, p. 219-226.

Research output: Contribution to journalArticle

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AU - Chi, K.

AU - McLean, M.S.

AU - Baker, T.N.

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