Continuous cooling transformation
A continuous cooling transformation (CCT) phase diagram is often used when heat treating steel. These diagrams are used to represent which types of phase changes will occur in a material as it is cooled at different rates. These diagrams are often more useful than time-temperature-transformation diagrams because it is more convenient to cool materials at a certain rate than to cool quickly and hold at a certain temperature.
Types of Continuous Cooling Diagrams
There are two types of continuous cooling diagrams drawn for practical purposes
- Type 1: This is the plot of transformation start, a specific transformation fraction and transformation finish temperature for all products against transformation time on each cooling curve.
- Type 2: This is the plot of transformation start, a specific transformation fraction and transformation finish temperature for all products against cooling rate or bar diameter of the specimenfor each type of cooling medium.
- Transformation diagrams (CCT & TTT), retrieved 2008-04-17.
|Wikimedia Commons has media related to Continuous cooling transformation diagrams.|
|This article about a mechanical engineering topic is a stub. You can help Wikipedia by expanding it.|