1 Selecting Surface-treatment Technologies - （1选择表面处理技术-）.pdf

1 1 Selecting Surface-treatment Technologies W. Tillmann, E. Vogli, Chair of Materials Technology, University of Dortmund, Germany 1.1 Introduction Nowadays, modern production processes require inherent state-of-the-art surface technologies. Furthermore, rising standards of technical products are creating the perception that surface technologies are often the central impetus needed for meeting product specifications. Design engineers thus face two essential tasks: On the one hand, part specifications need to be transformed into proper- ties of materials and surfaces. On the other hand, selected materials technolo- gies have to be integrated in corresponding process chains. Apart from the re- quired part specifications, production costs and ecological aspects are important issues. Not only production standards but also economic conditions lead to increas- ing significance of surface technologies. Considering the two substantial do- mains of surface technology, tribology and corrosion, macroeconomics experts estimate that tribological damage causes a loss of approx. 1% of the German gross national product (GNP). The economic effect of corrosion damage is even higher, approaching approx. 3.5–4.2% of the GNP. Surface technologies there- fore have to be considered as one of the key technology fields in production en- gineering. Here, one possible method for selecting surface-treatment processes that sa- tisfy existing requirements of specific parts is introduced. In addition, a variety of surface-treatment processes are compared with respect to possible fields of application and characteristics specific to the individual processes. 1.2 Requirements on Part Surfaces Systematic select