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Title: Chemical composition variations in shielded metal arc welds

Abstract

The use of shielded metal arc (SMA) welding can result in chemical composition variations along the weld length. Manganese and silicon, commonly found in low-carbon steel welds, change in composition with weld position. This research was performed to better characterize the composition variations observed in structural steel welds and to understand the controlling factors that determine the extent of these composition changes. Single bead-on-plate and multipass welds were performed and analyzed. Manganese, silicon, and oxygen contents showed significant variation along the weld length. To determine the cause of such composition variations, additional experiments were carried out with the welding arc established between the electrode and a water-cooled copper pipe. The individual metal droplets were collected in water and processed using standard particulate materials processing techniques to remove the slag covering. The droplet size distribution was determined and related to the composition variation and position along the weld length.

Authors:
;  [1]
  1. Colorado School of Mines, Golden, CO (United States). Center for Welding and Joining Research
Publication Date:
OSTI Identifier:
5523311
Resource Type:
Journal Article
Journal Name:
Welding Journal (Miami); (United States)
Additional Journal Information:
Journal Volume: 72:12; Journal ID: ISSN 0043-2296
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; STEELS; SHIELDED METAL-ARC WELDING; WELDED JOINTS; CHEMICAL COMPOSITION; CHEMICAL ANALYSIS; DROPLETS; MANGANESE; OXYGEN; SILICON; ALLOYS; ARC WELDING; ELEMENTS; FABRICATION; IRON ALLOYS; IRON BASE ALLOYS; JOINING; JOINTS; METALS; NONMETALS; PARTICLES; SEMIMETALS; TRANSITION ELEMENTS; WELDING; 360101* - Metals & Alloys- Preparation & Fabrication; 400201 - Chemical & Physicochemical Properties

Citation Formats

Bracarense, A Q, and Liu, S. Chemical composition variations in shielded metal arc welds. United States: N. p., 1993. Web.
Bracarense, A Q, & Liu, S. Chemical composition variations in shielded metal arc welds. United States.
Bracarense, A Q, and Liu, S. 1993. "Chemical composition variations in shielded metal arc welds". United States.
@article{osti_5523311,
title = {Chemical composition variations in shielded metal arc welds},
author = {Bracarense, A Q and Liu, S},
abstractNote = {The use of shielded metal arc (SMA) welding can result in chemical composition variations along the weld length. Manganese and silicon, commonly found in low-carbon steel welds, change in composition with weld position. This research was performed to better characterize the composition variations observed in structural steel welds and to understand the controlling factors that determine the extent of these composition changes. Single bead-on-plate and multipass welds were performed and analyzed. Manganese, silicon, and oxygen contents showed significant variation along the weld length. To determine the cause of such composition variations, additional experiments were carried out with the welding arc established between the electrode and a water-cooled copper pipe. The individual metal droplets were collected in water and processed using standard particulate materials processing techniques to remove the slag covering. The droplet size distribution was determined and related to the composition variation and position along the weld length.},
doi = {},
url = {https://www.osti.gov/biblio/5523311}, journal = {Welding Journal (Miami); (United States)},
issn = {0043-2296},
number = ,
volume = 72:12,
place = {United States},
year = {Wed Dec 01 00:00:00 EST 1993},
month = {Wed Dec 01 00:00:00 EST 1993}
}