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Title: Microstructure and mechanical properties of gas-shielded welding of C-Mn-Ni steel

Abstract

A range of semiautomatic gas-shielded arc welding consumables was selected in order to assess their suitability for producing uphill groove welds in 30-mm (1.2-in.) thick structural steel to BS4360:1986 Grade 50EE. In addition to a 1.2-mm diameter rutile and basic flux cored and metal cored welding wires were employed, all with Ar-20%CO[sub 2] shielding. A 2-mm diameter self-shielded flux cored welding wire was also included. All deposits contained nominally 1% Ni. Constant voltage power sources were used for the rutile and self-shielded electrodes, and synergic pulsed power sources for the remainder. All welding was carried out without preheat, and with a maximum interpass temperature of 150 C (302 F). For all except the self-shielded deposit, the as-deposited microstructure consisted predominantly of fine-grained acicular ferrite. In both the as-welded and stress-relieved conditions, the strength of all welds exceeded the strength requirements of the base plate. Charpy toughness exceeded the plate toughness requirement for the deposits produced with both the solid welding wire and the basic flux cored wire, but not for the metal cored and the self-shielded deposits.

Authors:
 [1]
  1. Welding Inst., Cambridge (United Kingdom)
Publication Date:
OSTI Identifier:
6522792
Resource Type:
Journal Article
Journal Name:
Welding Journal (Miami); (United States)
Additional Journal Information:
Journal Volume: 72:5; Journal ID: ISSN 0043-2296
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; CARBON STEELS; ARC WELDING; WELDED JOINTS; MECHANICAL PROPERTIES; MICROSTRUCTURE; CRACKS; FRACTURE PROPERTIES; NORTH SEA; WELDING RODS; ALLOYS; ATLANTIC OCEAN; CRYSTAL STRUCTURE; FABRICATION; IRON ALLOYS; IRON BASE ALLOYS; JOINING; JOINTS; SEAS; STEELS; SURFACE WATERS; WELDING; 360101* - Metals & Alloys- Preparation & Fabrication; 360102 - Metals & Alloys- Structure & Phase Studies; 360103 - Metals & Alloys- Mechanical Properties

Citation Formats

Abson, D J. Microstructure and mechanical properties of gas-shielded welding of C-Mn-Ni steel. United States: N. p., 1993. Web.
Abson, D J. Microstructure and mechanical properties of gas-shielded welding of C-Mn-Ni steel. United States.
Abson, D J. Sat . "Microstructure and mechanical properties of gas-shielded welding of C-Mn-Ni steel". United States.
@article{osti_6522792,
title = {Microstructure and mechanical properties of gas-shielded welding of C-Mn-Ni steel},
author = {Abson, D J},
abstractNote = {A range of semiautomatic gas-shielded arc welding consumables was selected in order to assess their suitability for producing uphill groove welds in 30-mm (1.2-in.) thick structural steel to BS4360:1986 Grade 50EE. In addition to a 1.2-mm diameter rutile and basic flux cored and metal cored welding wires were employed, all with Ar-20%CO[sub 2] shielding. A 2-mm diameter self-shielded flux cored welding wire was also included. All deposits contained nominally 1% Ni. Constant voltage power sources were used for the rutile and self-shielded electrodes, and synergic pulsed power sources for the remainder. All welding was carried out without preheat, and with a maximum interpass temperature of 150 C (302 F). For all except the self-shielded deposit, the as-deposited microstructure consisted predominantly of fine-grained acicular ferrite. In both the as-welded and stress-relieved conditions, the strength of all welds exceeded the strength requirements of the base plate. Charpy toughness exceeded the plate toughness requirement for the deposits produced with both the solid welding wire and the basic flux cored wire, but not for the metal cored and the self-shielded deposits.},
doi = {},
journal = {Welding Journal (Miami); (United States)},
issn = {0043-2296},
number = ,
volume = 72:5,
place = {United States},
year = {1993},
month = {5}
}