r4.04.01 Models of metallurgical behavior of steels

Summary:

This document presents the models of metallurgical behavior under heating and cooling. allowing to describe the structural transformations of steels during thermal cycles exceeding temperatures in the range of \(800°C\).

For the two types of transformations (heating and cooling) a description A detailed description of the available models is made and identification methods are given.

Finally, the hardness calculation model associated with metallurgy is presented.

• 1. Introduction
• 2. Model of metallurgical behavior under cooling
  • 2.1. Introduction
  • 2.2. Assumptions
  • 2.3. Choice of state variables
• 3. Identification and implementation of the cooling model
  • 3.1. Principle
  • 3.2. Integration of experimental data into the model
  • 3.3. Evaluation of the evolutionary function based on experimental data
• 4. Model of metallurgical behavior under heating
  • 4.1. Assumptions
  • 4.2. Shape of the selected model
  • 4.3. Integration of the evolution equation
  • 4.4. Evolution of austenitic grain size upon heating
  • 4.5. Meaning of metallurgical evolution
• 5. Identification of the heating model
  • 5.1. Determining function \({Z}_{\mathrm{eq}}(T)\)
  • 5.2. Determining function \(\tau(T)\)
• 6. Hardness calculation model
• 7. Income model
  • 7.1. Introduction
  • 7.2. Principles of the model
  • 7.3. Identifying model parameters
  • 7.4. Resolution algorithm
• 8. Bibliography