Continuous Cooling Transformation Diagram for Welds
The continuous CCT diagram shows steel's phase transformations during cooling after welding. It helps you pick the right welding process and parameters.
Physical-chemical mechanism of action
The continuous CCT (Cooling Transformation) diagram visualizes how steel's structure changes during cooling. It shows various grain states and phases that form depending on temperature and time.
Metallurgical relevance & welding risks
The diagram is key for choosing the right welding process and parameters. Wrong cooling can cause unwanted transformations, like glass-hard martensite or coarse grains, which hurt toughness and formability.
Workshop practice & instructions
To use the continuous CCT diagram effectively, do this:
1. Determine the desired phase transformation for your application.
2. Read the relevant section of the diagram to find the required cooling rate.
3. Adjust welding parameters like temperature, time, and airflow to hit that cooling rate.