Research on Forming Process of Laser Cladding Thin-Wall Part of 316L Stainless Steel Powder
During the cladding process of 316 L stainless steel with single thin-walled and thin-walled specimen,the cladding head was stopped abruptly,and the powder delivery was uneven,which led to warping,deformation and cracks in the cladding layer.Uniform powder feeding and"random path"method were adopted,which enlarged the heat dissipation area,reduced the temperature gradient,avoided the accumulation of a large amount of heat in the specimen,and effectively improved the forming quality of the specimen.Thus,the dendrite,columnar crystal and cellular crystal structures distributed in sequence from the top to the base layer were obtained,and the hardness of the cladding parts showed a decreasing trend accordingly.
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