Profile: Wallwork Heat Treatment (Birmingham) Ltd offers heat treatment, hard coatings and other surface engineering services. Our carburising and carbonitriding are thermochemical treatments, usually conducted at temperatures in the first stage of case hardening. These processes change the chemical composition of the surface of a low carbon steel component so that subsequent fast cooling, by quenching produces a hard case combined with a softer or tougher core. Our ion implantation utilize a simple and reliable ion source design which was developed sepcizally for the implantation of gaseous ions into engineering materials.