What causes the formation of slag on a weld?
Weld slag is a nonmetallic byproduct of certain types of welding processes. Weld slag is formed when the flux used in the welding process solidifies after the welding has been performed. The weld slag is a combination of the flux and the impurities or atmospheric gases that combined with the flux during welding.
What is the top of the weld called?
Fillet Weld Face
Fillet Weld Face – The surface or top of the weld. Fillet Weld Leg – From the intersection of the joint to the end of the weld. There will be a leg for each plate.
What is slag formation?
slag, by-product formed in smelting, welding, and other metallurgical and combustion processes from impurities in the metals or ores being treated. Slag floats on the surface of the molten metal, protecting it from oxidation by the atmosphere and keeping it clean.
What effect does slag have on a vertical weld?
On solidifying, it will also be easier to remove it. In vertical welding applications, the slag should have lower viscosity for better flow. It should also have higher surface tension to support the weld pool and prevent it from flowing away.
What happens when welding over slag?
A very hot weld can successfully melt the slag and get it to rise to the surface of a new weld, but this can range from tricky to impossible depending on the thickness of the metal being welded and the capabilities of your machine. Doing this may also overheat the metal and cause other serious weld defects.
What happens if you leave slag on a weld?
So, if left on, the welding slag will actually increase the changes of rust in a damp environment.
What is actual throat?
– Actual throat – The shortest distance between the weld root and the face of a fillet weld. – Theoretical throat – The distance from the beginning of the joint root perpendicular to the hypotenuse of the largest right triangle that can be inscribed within the cross section of a fillet weld.
What is slag and where it is used?
Slag is a byproduct of steel production and is similar in character to volcanic rocks such as basalt and granite. Slag is primarily used in the cement and construction industries, and largely in road construction. Slags are one of the most natural products of all.