Carburizing ferrous material, comprises providing component made from ferrous material, determining diffusion coefficient of carbon in austenite phase of ferrous material, determining process parameters for carburization of component

摘要

The method comprises: providing a component made from a ferrous material, which is carburized; determining a diffusion coefficient (D c) of a carbon in an austenite phase of the ferrous material, where a dependent of the D cis considered by an alloy- and ferrous-accompanying elements of the ferrous material; determining process parameters for a carburization of the component to achieve a desired curve of a carbon concentration with the depth under consideration of the determined D c; and performing the carburization of the component using the process parameters. The method comprises: providing a component made from a ferrous material, which is carburized; determining a diffusion coefficient (D c) of a carbon in an austenite phase of the ferrous material, where a dependent of the D cis considered by an alloy- and ferrous-accompanying elements of the ferrous material; determining process parameters for carburization of the component to achieve a desired curve of a carbon concentration with the depth under consideration of the determined D c; and performing the carburization of the component using the process parameters. The D cis determined by a modification of the (D c) of the carbon in the austenite in a binary system of ferrous-carbon. The modification is utilized by the D cof the concentration of the alloy- and accompanying elements and an element-dependent on an interaction factor. The D cis calculated according to an equation as given in the specification. The carburization is a gas carburizing and/or the step of determining the process parameter is carried out during an implementation of the carburization. The step of performing the carburization contains a process control with continuous online-calculation of a time-developing depth profile of the carbon concentration under consideration of the determined (D c), and the process parameters are continuously adjusted to reach a process target value by the parameters.