Sheetcam Hot Crack !full! -

What and CNC control software are you using?

To understand the defect, one must first define the mechanism of hot cracking. Unlike "cold cracking," which occurs after the metal has cooled and is often related to hydrogen embrittlement, hot cracking occurs at high temperatures, typically just above the solidus temperature of the material. As molten metal cools, it undergoes a transition from a liquid to a solid state. During this process, impurities and alloying elements with lower melting points—such as sulfur and phosphorus in steel, or silicon in aluminum—are pushed to the grain boundaries. These impurities form liquid films along the grain boundaries. If the thermal contraction stresses exceed the strength of these liquid films before the metal fully solidifies, the material separates internally, resulting in an intergranular crack. sheetcam hot crack

Improperly configured CAM strategies can lead to localized overheating, rapid quenching, and excessive mechanical stress—the exact ingredients required for hot cracking. This article explores the root causes of hot cracking in thermal cutting, how SheetCam settings impact this phenomenon, and actionable strategies to eliminate the defect from your production line. What is Hot Cracking in Thermal Cutting? What and CNC control software are you using

SheetCam allows for path rules that slow down the torch around tight corners to maintain edge angularity. However, slowing down too much increases heat input dramatically, mimicking the effects of an excessive pierce delay. How to Fix "SheetCam Hot Cracking" As molten metal cools, it undergoes a transition

When a plasma torch stops at the end of a path, the sudden loss of arc pressure and heat can cause the molten metal pool to collapse inward. This often leaves: A divot at the end of the cut.