Research On Embedded Stainless Complex Channel In High Frequency Induction Cladding

With the progress and development of manufacturing technology,product integration is gradually strengthened,which makes the size of key components miniaturized.As the key structure of cooling,micro-porous and micro-channel structures have been widely used in the manufacturing of key components for aerospace,automobile,new-generation integrated circuit(IC)cold plate,precision medical instruments and other fields.Induction cladding is a new surface modification technology,which can form a cladding layer on the surface of the substrate to improve its surface properties.Based on induction cladding technology,304 stainless steel complex channel with good mechanical properties is embedded in the cladding layer on the substrate surface to meet the requirement of forming micro-channel on the surface of key parts.The forming law of embedded micro-channel was explored by combining theoretical analysis,simulation and experimental investigation.The main contents of this paper are as follows:According to the requirement of the project,the corresponding experimental methods are designed,the appropriate experimental platform is built,and the experimental research is carried out;the metallographic structure and he flow rule of boundary element under different process parameters are analyzed,and the phase analysis is carried out;the finite element simulation model is established based on ANSYS finite element analysis,and the accuracy of the temperature field model is verified by design and verification experiments;the temperature field under different process parameters is explored.The distribution and influence of temperature field distribution on the quality of formed parts,the rule of heat transfer during heating process and the temperature control mechanism are studied to avoid the unmelting of cladding layer and the overmelting of embedded body.On the basis of experimental investigation and simulation,process parameter optimization experiments are carried out to analyze the defects of forming parts to explore the causes of the defects in cladding technology,such as porosity,cracks,entrainment and melting of embedded bodies,the relationship between deformation of embedded bodies and process parameters is analyzed while the preparation process and process parameters of refined samples are adjusted,The residual parts and the influence of residual stress on the forming part is explored by X-ray stress tester to optimize the process parameters are reduce the residual stress.The hardness of the forming part is tested under different process parameters,and the effect of process parameters on the hardness of the forming part is explored.While the hardness of the sample is compared with that which doesn’t own embedded complex channel to analyze the influence of the embedded body on the hardness of the sample.In order to obtain the optimum process of the embedded stainless steel complex channel forming parts,a new process method is provided for the forming and manufacturing of micro-holes and micro-channels.