| About this Abstract |
| Meeting |
2023 AWS Professional Program
|
| Symposium
|
2023 AWS Professional Program
|
| Presentation Title |
Effect of Wire Preheat and Feed Rate in X80 Steel Laser Welds |
| Author(s) |
Adrian Gerlich, Hanwen Yang, James Chen |
| On-Site Speaker (Planned) |
Adrian Gerlich |
| Abstract Scope |
Modern pipelines are made of high strength low alloy (HSLA) steels due to their high strength and superior toughness. Welding is an essential process for fabricating large-scale pipelines, which determines the productivity and reliability of the pipeline system. Replacing conventional welding methods like submerged arc welding (SAW) and gas metal arc welding (GMAW) with laser or hybrid laser welding can significantly increase the productivity and may reduce the construction costs through a combination of high welding speed and deep penetration. However, for the welding of carbon steels, autogenous laser welding has drawbacks including poor gap-bridging ability, and high cooling rate which could result in the weld metal brittleness. Feeding an additional wire could increase the gap tolerance, and modify the chemical composition and weld metal microstructure. The present study demonstrates the effect of wire feed rate (WFR) and the preheat of the wire on the microstructure and mechanical properties such as microhardness, tensile strength, and Charpy V-notch impact toughness during laser keyhole welding of X80 pipeline steel. |
| Proceedings Inclusion? |
Undecided |