The effects of different heat treatment temperatures on the mechanical properties

microstructure and corrosion resistance of 316L/Q370qE were investigated by means of scanning electron microscopy (SEM)

hardness tester

universal testing machine and salt spray box. The experiment can be concluded that the diffusion zone width of the three samples is widened with temperature increasing at heat treatment temperatures of 400 °C

700°C and 1100 °C. The shear strength at the interface of 316L/Q370qE composite board is greater than 385 MPa

which is greater than 210 MPa required by specifications. The 316L side is dominated by pitting in the salt spray environment

and the Q370qE side is dominated by uniform corrosion. The annual corrosion rate is the lowest at 400 Y and the highest at 700°C.