Mechanical properties of high boron alloyed stainless steel composite plate

High boron alloyed stainless steel composite plate(HBASSCP) with boron content 2%-2.5% was fabricated by composite casting and hot forming process. The test of three-point bending shows that the tensile and compression deformation of middle layer of boron alloyed stainless steel have reached 5.6% and 6.0% respectively after solution treatment. The plasticity of boron alloyed stainless steel composite plate after solution treatment is close to 304BN7(B grade) of ASTM Standard. The boron alloyed stainless steel composite plate has better plasticity than single plain stainless steel when they are bended by this method. Typical morphology of dimples are observed in the matrix of both outer and middle layers. Cleavage fracture are observed between the borides and matrix in the middle layer, leading to the reduction of plasticity.