Microstructure,Wear And Corrosion Behavior Of 316L And SiCp/316L Materials By Laser Melting Deposition

3D printing as an epoch.making research technology,with its own advantages,is widely used in automobiles,aerospace,ships,art design,education,medical and so on.The state has established a new 3D printing center to support the development of national manufacturing capacity.As China's "China made 2025 plan",3D printing will play an irreplaceable role in high.end manufacturing and intelligent manufacturing.With the application of 3D printing is more widely,along with the increasingly harsh working environment,a single material has been unable to adapt to the modern production of the harsh environment and complex change conditions on microstructure,3D printing parts of China's mechanical properties,friction of corrosion,the particles prepared print sample.The microstructure,mechanical properties,electrochemical corrosion properties were studied,so as to research and production for future 3D printing to provide a theoretical basis for engineering application,so as to meet the conditions of the increasingly demanding needs.In this paper,the stainless steel sample was prepared by selective laser forming technology with two kinds of materials,316 L powder and Si Cp/316 L powder with diameter of 50 um,under the same Exposure time,the same scanning distance and 5 different exposure time parameters.Dry friction and electrochemical tests were carried out by dry friction and electrochemical apparatus.The samples were analyzed by means of SEM,XRD,optical microscope and profilometer.The microstructure,mechanical properties and friction corrosion properties of the samples were analyzed.The study found that: in the mechanical properties of samples,316 L and Si Cp/316 L stainless steel with increasing print exposure time,reduce the defects of the parts,with the accumulation of more and more dense layer,hardness,tensile strength and elastic modulus of the part increased with the increase of the exposure time,when the exposure time reaches 130 s,exposure time to rise the hardness,tensile strength and elastic modulus enhancement effect is not obvious.The friction properties of samples,316 L and Si Cp/316 L stainless steel with increasing exposure time of printing,the wear resistance of parts is enhanced,when the exposure time reaches 130 s,exposure time to rise resistance enhancement effect is not obvious;so from wear resistance considerations,the exposure time of 130?s the best wear resistance.When 316 L and Si Cp/316 L exposure time is longer,the corrosion resistance is strong,when the current density is 130 when the exposure time is the lowest,the best corrosion resistance,when the exposure time reached 130 s,increased the exposure time of parts density increase is limited,so to improve the resistance of parts Co.corrosion resistance,rational use of resources from the point of view,130 s is the best corrosion print exposure time.This paper was studied by means of selective laser forming of samples under different exposure time,changes in mechanical properties of samples under different exposure time of the summary,explaining the evolution process of the friction performance without the exposure time,expounds the change law of corrosion resistance under different exposure time pattern,provide a theoretical basis for the engineering damage explain the failure behavior of different exposure time.