MACHINERY FEATURE COLD SPRAY SYSTEMS OVERCOME DISTORTION AND POROSITY
Major gains in substrate repair, coating and manufacturing applications that arise from cold spray systems were spotlighted by Dycomet UK at the 2016 Advanced Engineering Exhibition. Cold spray metal additive manufacturing systems offer key advantages to manufacturers. “We demonstrated our versatile, low pressure gas dynamic designs alongside Plasma Giken high pressure units which have been proven in industrial and research applications across Europe,” says managing director Nick Gilfillan. “The concept overcomes issues such as stress, distortion and porosity that are often associated with traditional welding and thermal spraying and can be used with a range of substrates from aluminium, cast iron, steel and copper to glass, ceramics and composites.” “Both the low and high pressure units feature a supersonic airflow into which metal particles are injected,” continues Gilfillan. “This produces high levels of kinetic energy to create a rapid build-up of metal which is not simply added to the surface but becomes structurally integral with the substrate.” Acceleration in airflow means the particles and substrate deform creating a mechanical interlock. This forms a coating or build-up of material to any depth
Cold spray technology opens up possibilities in sectors from repair, restoration, sealing and corrosion protection to electrical conductivity or bespoke specialist needs
required with high adhesion yet without the risk of high temperatures which can lead to material weakening or distortion. This technology opens up possibilities in
industrial processes from repair, restoration, sealing and corrosion protection to electrical conductivity or bespoke specialist requirements.
RELIABLE PERFORMANCE The simplicity of use of the low pressure units enables them to be located at the point of application when required while the high pressure Plasma Giken system operates on the same principle but is
designed for larger scale permanent installations. Delivering up to 1200 metres per second, this system can handle the most challenging materials including titanium, MCrAIY and stainless steel with results achieved quickly via feed rates of up to 750g/minute. The ‘anti-clogging’ design provides continuous, reliable cold spray performance that can operate either as a standalone facility or incorporated directly into a production line.
Dycomet UK T: 0161 351 3810
www.dycomet.co.uk
FACTORY EQUIPMENT | DECEMBER/JANUARY 2017 15
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