Effect of Reduction Rate on Microstructure and Properties of 304/High Manganese Steel Clad Plate
The changes of interface structu re,alloying element diffusion and mechanical properties of 304 stainless steel/high manganese steel clad plates were studied by the change of rolling reduction rate.The results show that the microstructure on both sides of the interface of 304/high manganese steel clad plate is stable austenite.With the increase of the reduction rate,the grain size decreases gradually,and the grain size difference on both sides of the interface decreases.There are a lot of small angle grain boundaries at the interface,and the bonding strength and tensile properties are improved by the mechanisms of fine grain strengthening,grain boundary strengthening and dislocation strengthening.In addition,with the increase of the reduction rate,the element diffusion layer is reduced,and the sizes of Al and Mn oxides and Cr carbides at the interface are reduced and dispersed.With the increase of the reduction rate,the clad plate interface is strengthened,the strength gradually increases,and the elongation gradually decreases.
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