High Strength Steel Welding Research
Abstract
The application of high strength low alloy (HSLA) steels has been limited by the availability of suitable filler metals. Specifically, as the weld metal strength increases, the susceptibility to hydrogen-assisted cracking increases. To take full advantage of the developments in HSLA steel base metals, weld filler metals which minimize the effects of diffusible hydrogen and develop tough microstructures must be designed. The benefit of yttrium-containing inclusions to provide effective hydrogen traps and reduce diffusible hydrogen levels, as well as, to act as intragranular nucleation sites to produce tough microstructures has been demonstrated. Furthermore, fluoride-containing consumables have been demonstrated to reduce weld metal diffusible hydrogen levels through reactions within the arc atmosphere. The current research was undertaken to study the effects on welding characteristics and weld metal properties when these two concepts are integrated into a single welding consumable. Additionally, current methods of quantifying the amount of diffusible hydrogen in a steel weldment are destructive and are performed only after the weldment has been deposited.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 27, 2005
- Accession Number
- ADA433883
Entities
People
- Glen Edwards
- Stephen Liu
Organizations
- Colorado School of Mines