It's a kind of magic – low-pressure cold spraying is a new process used by mtu in the remanufacturing of engine components. Two powders, one spray gun, power and compressed-air connections and an extraction system are all you need to get started. And in a few minutes damaged components are restored to their original condition.
If, for example, a used crankcase with surface damage is sent in for reconditioning by a client, in the past it would have been repaired with epoxy resin adhesive among other things. However, that tended to become detached again after a short time. "The low-pressure cold spraying process has the potential to replace the bonding techniques used here," explains Uwe Czerney, design engineer at MTU Reman Technologies in Magdeburg. "It can fill surface damage up to 10 mm deep within a few minutes. And the best thing is, the crankcase itself is hardly heated at all, does not have to dry out and can be further processed immediately afterwards. As well as that, the repair lasts significantly longer."