J. Wilden, Technische Universität Berlin, Berlin, Germany; J. P. Bergmann, D. P. H. Frank, Technische Universität Ilmenau, Ilmenau, Germany
Plasma Transferred Arc welded coatings are used for improving surface properties of mechanical parts. Advantages are the flexible choice of coating material, the high reliability of the process and the low dilution between substrate and coating material. Processing of component’s surface through plasma cladding is restricted at the time to horizontal position. Furthermore industry is interested in developing strategies for coating with PTA in vertical and in other constraint positions as complex 3-D parts could be then easily processed as well.
Under commercial aspects, the process parameters can be optimised to increase the process efficiency and to reduce the heat input during the welding process. This involves the determination of guidelines for PTA welding in constraint positions. Modelling the process allows an alternative to determine the influence of the process parameters on the welding process with less experimental effort. Results of simulation studies regarding influencing the process will be given in the present work. It will be shown, that coating conditions can be optimised by varying plasma gas flow, heat input and heat flow, process speed or powder injection with regard to welding in constrain positions. The defined controlling of process allows to modify process management with less experimental effort and to develop coating strategies for processing in different positions. In experimental investigations the developed coating strategies will be confirmed by producing PTA coatings in constraint positions as well as complex 3-D parts.
Plasma Transferred Arc welded coatings are used for improving surface properties of mechanical parts. Advantages are the flexible choice of coating material, the high reliability of the process and the low dilution between substrate and coating material. Processing of component’s surface through plasma cladding is restricted at the time to horizontal position. Furthermore industry is interested in developing strategies for coating with PTA in vertical and in other constraint positions as complex 3-D parts could be then easily processed as well.
Under commercial aspects, the process parameters can be optimised to increase the process efficiency and to reduce the heat input during the welding process. This involves the determination of guidelines for PTA welding in constraint positions. Modelling the process allows an alternative to determine the influence of the process parameters on the welding process with less experimental effort. Results of simulation studies regarding influencing the process will be given in the present work. It will be shown, that coating conditions can be optimised by varying plasma gas flow, heat input and heat flow, process speed or powder injection with regard to welding in constrain positions. The defined controlling of process allows to modify process management with less experimental effort and to develop coating strategies for processing in different positions.
In experimental investigations the developed coating strategies will be confirmed by producing PTA coatings in constraint positions as well as complex 3-D parts.
