Welding and Metal Working Flashcards

What does the term 'kerf' refer to in metal cutting?

Answer: The width of material removed by the cut

Kerf is the width of the slot left behind by a cutting tool or torch.

Which process joins metal without melting the base metal, using a filler with a lower melting point?

Answer: Brazing

Brazing joins metals with a filler alloy that melts below the base metal's melting point.

What is the heat-affected zone (HAZ) in welding?

Answer: Base metal whose properties were changed by welding heat

The HAZ is the region near the weld where heat altered the metal's microstructure without melting it.

Which metal is most resistant to rust due to its chromium content?

Answer: Stainless steel

Stainless steel contains chromium that forms a protective oxide layer resisting corrosion.

What causes 'undercut' along the edge of a weld?

Answer: Excessive heat melting away the base metal edge

Undercut is a groove melted into the base metal next to the weld from too much heat.

Which measuring tool gives the most precise reading of metal thickness?

Answer: Micrometer

A micrometer measures small thicknesses to thousandths of an inch with high precision.

Before welding galvanized steel, what should be done for safety?

Answer: Remove the zinc coating and ensure ventilation

Burning zinc produces toxic fumes, so the coating should be ground off and the area well ventilated.