Heat input is one of the most important factors affecting the quality of a weld due to its formative effect on the Heat Affected Zone (HAZ) and weld metal properties, particularly mechanical toughness, and development of potential flaws.
Digitizing data, the downloading, sharing, and analyzing of it is a cornerstone of Industry 4.0. What does that mean for welding workshops?
The range of LORCH Mig welding machines is a good example of where synergic control is heading in the Industry 4.0 era.
TIME is the single biggest cost in welding. This is particularity relevant in NZ as we are increasingly competing on a global basis against manufacturers and fabricators from countries with low labour costs.
Highly skilled welders can still experience weld flaws, particularly when getting used to new equipment, or under pressure to meet deadlines, however, more often than not the issue of weld defects boils down to a lack of skilled staff.
Productivity improves with increased deposition rates and higher travel speeds, combine this with the minimal spatter and lack of clean up required.
Diagrams for a quick estimation of the consumption of welding consumables for welding ferritic steel, butt joints and fillet joints.
The quality of weldments made by GSMAW is markedly affected by the welding parameters set by a welder or a welding operator.
PWHT relieves residual stresses, remove diffusible hydrogen, and temper hard transformation microstructures of the weld, preventing brittle fractures.
Porosity refers to cavity-type discontinuities or pores formed by gas entrapment during the solidification of molten weld metal.
Hot crack can be defined as cracking formed at high temperatures near the solidus of the metal, where the metal has coherence but is completely brittle.
Hydrogen cracking can occur when welding carbon and low-alloy steels. The potential for hydrogen cracking in the weld metal and HAZ depends on their composition.
