The Carburization interface () is found under the Heat Transfer>Metal Processing () branch when adding a physics interface. The physics interface is intended for modeling carburization processes during heat treatment. The carburization process is based on diffusion, and it is used to compute the evolving mass fraction of carbon when a component is exposed to a carbon rich atmosphere.

When the Carburization interface is added, three default nodes are added to the Model Builder — a Carburization node, an Initial Values node, and a Zero Carbon Flux node.

The Label is the default physics interface name.

The Name is used primarily as a scope prefix for variables defined by the physics interface. Refer to such physics interface variables in expressions using the pattern <name>.<variable_name>. In order to distinguish between variables belonging to different physics interfaces, the name string must be unique. Only letters, numbers, and underscores (_) are permitted in the Name field. The first character must be a letter.

The default Name (for the first physics interface in the model) is carb.

Carbon diffusion is inherently temperature dependent. Select the temperature field to use from the Temperature list.

This section contains settings for the carburization process. Select the carbon potential model to use from the Carbon potential model list. Select Boost-diffuse cycle if you want to model a two-stage carburization process, where a boost stage is followed by a diffuse stage. Define the Boost carbon potential cboost, the Diffuse carbon potential cdiffuse, and the Boost period tboost. Select User defined if you want to use your own expression for the carbon potential of the carburization process. Define the Carbon potential cpot.