A pre-research project of the supporting transmission system of a civil turboshaft engine, to verify the feasibility of laser additive repair method and the typical materials of typical parts of the transmission system. The performance after the repair meets the requirements. Take the tail shaft spline as an example. There is wear and tear, laser cladding additive repair technology is used to repair the parts, and various aspects of performance are investigated.


The spline is divided into an internal spline and an external spline. The material of the internal spline is 15-5ph and the material of the external spline is 9310 steel. There are no restrictions on the materials used for laser additive repair, and it can meet the performance requirements. Laser cladding material metallographic inspection meets the technical requirements, and there are no defects such as pores, slag inclusions, cracks, etc.

Metallographic diagram of 15-5ph substrate and 9310 steel substrate laser cladding repair material (the lower part of the metallographic diagram is the cladding layer)


After the mechanical property test passes the test, the simulated sample is repaired. In order to ensure the repair after cladding, a certain thickness needs to be guaranteed, and the scanning path needs to be designed according to the shape of the spline.