Chemical composition variations in shielded metal arc welds

Journal Article · Wed Dec 01 00:00:00 EST 1993 · Welding Journal (Miami); (United States)

OSTI ID:5523311

Bracarense, A Q; Liu, S ^[1]

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1. Colorado School of Mines, Golden, CO (United States). Center for Welding and Joining Research

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.

• OSTI ID: 5523311
• Journal Information: Welding Journal (Miami); (United States), Vol. 72:12; ISSN 0043-2296
• Country of Publication: United States
• Language: English

Related Subjects

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