Study On The Responsiveness And Performance Of Different Compositions Of Matrix Materials For Laser Bionic Fusion

With the development of laser technology,laser fusion technology for strengthening the surface of steel materials has been widely used.A variety of steels with different properties and uses are applied in the actual production process.However,an isolated study,one or more of them,has little significance for large-scale industrial production and consumes time and manpower.There is little research of the influence of the steel composition on the feature parameters,microstructure,hardness and performance of the Laser fusion treatment region,which the region is called unit.There is no theoretical reference about it.In this dissertation,the steel materials used in industrial production are divided into carbon steel and alloy steel according to the main components.The steels with different carbon contents and alloying element contents was processed by Nd:YAG pulsed laser.The Nd:YAG pulsed laser was used to compare and analyze the variation regularity of parameters,microstructure,hardness and properties of the unit body obtained after the laser fusion treatment with different carbon content and alloying element content,and the variation regularity of the feature parameters,microstructure,hardness and properties of the unit,which was obtained from different base metal by the laser fusion treatment,were compared and analyzed.The results show that the unit body characteristic parameters are affected by both the laser energy density and the parent material composition.For the same material,the area of the unit increases as the laser energy density increases.When the energy density is constant,the unit area increases first and then decreases as the carbon content increases,and as the alloying element content increases.When the unit area is constant,the required energy density decreases first and then increases as the carbon content increases,and decreases as the alloying element content increases.At the same energy density,with the carbon content increases,the martensite carbon content increases,the martensite content of the lath decreases,and the content of flake martensite increases,making the hardness difference of the bionic specimen unit larger and the average hardness increases either.As the alloying element content increases,the surface temperature rises,carbon atoms increase,the microstructure and the grain first increase and then decrease,so that the bionic sample unit body hardness difference decreases,the unit body grain first decrease and then increase so the average hardness increases first and then decreases.The tensile properties of the bionic specimen are affected by the composition of the base metal.Compared with the untreated specimen,the tensile strength of the C1-C4 specimen increases,and as the carbon content increases,the bionic specimen tensile strength increases,but the plasticity decreases.The yield strength and tensile strength of the specimens A1 and A2 increase and A3,A4,and A5 decreases,and the plasticity decreases significantly.With the increase of the content of alloy elements,the tensile strength of bionic specimens has been increasing.Bionic specimens have improved wear resistance compared to the untreated specimen.The greater the hardness increase,the greater the wear resistance improvement.For bionic specimens,as the carbon content increases,the wear resistance also increases.With the increase of alloying element content,the wear resistance decreases first and then increases.