It is rolled into pieces and distributed in strips along the rolling direction, which has a certain influence on the mechanical properties of the AH36 steel plate in the thickness direction.
Without deformation or slight deformation, since it cannot elongate uniformly like AH36 steel plate, stress concentration will occur at the interface between inclusions and steel, resulting in cracks. The cracks between them and the steel are generally perpendicular to the flow direction of the steel. With the flow of the steel, the cracks form a conical gap on the interface between the inclusions and the AH36 steel plate. The size depends on the plasticity and rolling of the inclusions. temperature, deformation rate, etc.
Since the transverse compressive stress in the AH36 steel plate is perpendicular to the flow direction of the steel, the conical gap may be filled, leaving only cracks. When the inclusions have a certain plastic deformation ability, before the cracks on the interface between the AH36 steel plate and the inclusions are bonded, the outer layer of the inclusions elongates along the flow direction of the steel, resulting in fishtail inclusions. And form a gap between the AH36 steel plate and the inclusions.
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