Cooling Time from 800 to 500 Degrees Celsius

A central welding metallurgical parameter describing the time required for a welded joint to pass through the critical temperature interval for phase transformations. It decisively determines the resulting microstructure in the heat-affected zone.

The cooling time between 800 and 500 degrees is crucial in welding because that's where the steel's structure forms. Cool too fast and the material gets hard and brittle, as martensite forms. Cool too slow and the grain gets coarse and toughness suffers. You have to hit the cooling time so the structure stays tough and stable. The right setting depends on the steel grade and plate thickness, since heavy parts dissipate heat differently than thin sheets.

MetallurgieSchweißtechnik