Based on the effects of different technological parameters of laser wire filler cladding on the forming of Q235 steel cladding layer

the melting processes of filler wire under different parameters are recorded by high speed photography system

the morphology and cross section of the cladding layer are analyzed

and the effects of the relative position of the filler wire and laser spot

laser power

cladding rate and wire feed rate on the forming of cladding layer are obtained. The result shows that:（1） the relative position of the filler wire and laser spot is the key factor affecting the melting behavior of filler wire and the forming quality of the cladding layer. When using the pre-wire feed

the laser beam overlaps partially with the filler wire

and the wire feed angle is between 40° and 70°

the cladding process is stable and the forming is the best.（2） When the laser power increases

the size of the molten pool and the width of the cladding layer increase

the reinforcement reduces. When the cladding rate increases

the solidification rate of the molten pool increases

which narrows the bridge

and the width and penetration of cladding layer reduce

the reinforcement increases. When the wire feed rate increases

the penetration of cladding layer reduces and the reinforcement increases.