Continuous cooling transformation diagram
The continuous TTT diagram shows phase transitions during continuous cooling from austenite. It visualizes hardness and cooling time.
Physical-chemical mechanism of action
Continuous CCT diagrams (Cooling Transformation) show how the metal changes into different crystal states during cooling. They consider hardness and the time the material stays in each state.
Metallurgical relevance & welding risks
The diagram helps you pick the right cooling process to get the desired properties. Wrong cooling can lead to unwanted phases like martensite, which boosts hardness and causes cracking.
Workshop practice & instructions
Use the diagram to figure out cooling time and temperature for different metals. For high-carbon steel (e.g., HSS), slow cooling is needed to avoid martensite. Keep a close eye on temperature control and timekeeping during the cooling phase.