Experimental Research on Surface Shaping Quality of 316L Cladding Layer by Additive Manufacturing
Additive manufacturing is a new manufacturing method in recent years,which has the advantages of green environ-mental protection,material saving,production cycle saving,etc.Laser cladding technology is the main method of metal materi-als additive manufacturing.In this paper,316L cladding layer was prepared by laser cladding experiment,and the surface shap-ing quality of the cladding layer was analyzed.The influence of laser power,powder delivery rate,scanning speed,lap rate,amount of each layer and scanning path on the surface morphology of the 316L cladding layer was investigated.With the in-crease of scanning rate,the height,width and depth of cladding line decrease,and the overall trend of dilution rate increases.With the increase of powder delivery rate,the depth of fusion increases first and then decreases,the height of cladding line in-creases,and the width and dilution rate decrease.When the transverse overlap rate is45％,the surface of the cladding layer is rel-atively flat.When the lifting amount of z-axis is equal to the height of single layer cladding,the height of specimens is the high-est and the forming morphology is good,without collapse phenomenon.The two sides of the specimens formed by round-trip scan-ning method have uniform and consistent height topography and no obvious collapse phenomenon.The experimental results pro-vide data support and experimental basis for laser cladding technology of 316L.
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