Process chain for the manufacture of thermallycoated cylinder bores

Thermally sprayed cylinder bores are manufactured in a complex process chain. The roughening using a variant of fine drilling is followed by the HVOF process as a thermal wire spraying process. The subsequent water blasting serves to eliminate the overspray underneath the bore in the crankcase. The concluding honing produces a liner surface which has superior tribological properties and is appropriate for the functions. Due to the diverse interactions between the individual process steps and the work result, complex understanding of the process chain and its parameters is required for the implementation by means of fabrication technology.