According to the same anticorrosive steel shell and metal material, the spiral tube breakage can be divided into three types: cleavage fracture, spherical fracture resistance and sliding surface separation fracture.
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Anatomical fracture along a strict crystal-product surface separation is called cleavage plane. When the fracture occurs along the grain plane, the theoretical minimum fracture strength is obtained. The specific surface energy y of cleavage plane factor, the distance between crystal planes and the elastic modulus along the normal direction are determined. The cleavage fracture has almost no plastic deformation. It is a brittle fracture occurring in the center of body-centered cubic and hexagonal densely packed gold. Fcc metals generally do not cleavage. Shear fracture is the main fracture mechanism of metals in L ductile materials. For example, the second phase particles of corrosion-resistant steel alloy hinder slip and increase the resistance to plastic deformation; when plastic deformation increases, Aung occurs at the interface between the second phase particles and the matrix, resulting in micro-holes; and the shear section will be formed when the second phase particles and the matrix interface peel off. For high purity metals, because there are no second phase particles, bimetallic wear-resistant composite tubes will not produce: raw and small holes, the result of the battle will only increase along the surface area, and finally form a sliding plane separation. The anti-corrosion steel composite spinning technology is precisely controlled under special equipment. The heat generated by the rotation of the press wheel and the friction of the liner quickly reaches the softening point of stainless steel. The elastic deformation of the outer tube of the drum extrusion can be realized by the interference of both. From the viewpoint of Jinhui histology, it can be divided into fracture along fracture and transgranular fracture.