AbstractBoronizing coatings were prepared by means of pack cementation technique. It was found that using the appropriate substrate and controlling parameters of the boribing process such as boron activity of the mixture, temperature and time of treatment, it is possible to obtain a structure predominantly consisting of the Fe2B phase. In the present study low alloy ferritic steels were chosen as substrates. Changing the boron carbide concentration in the mixture and the temperature and time of boronizing process the conditions of the boronizing were altered. As a result the formation of the Fe2B phase is enhanced. Characterization of the as‐borided steels is discussed based on X‐ray diffraction and Curie temperature measurements. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)