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What is the effect of extrusion processing for special-shaped steel pipe?

Author: Wuxi Xindi Special Pipe Co., Ltd    Time: 2021 / 4 / 20 11:00:51    Source: http://iranstorylogue.com

   Special shaped steel pipe What are the processing methods and effects

   Special shaped steel pipe It is a kind of precision processed seamless steel pipe raw material, which has the advantages of no air oxide layer on the surface, no leakage under high pressure, high precision, high smoothness, no deformation in cold drawing, expanding, extruding and seamless, etc. Special shaped steel pipe If the extrusion processing method is selected, what is the effect of extrusion processing on the selection of profiled steel pipe? Now I'll introduce it to you.

Because the residual compressive stress is left in the surface layer, the micro cracks in the surface layer are closed to prevent the expansion of sedimentation, and then enhance The surface layer is corrosion resistant, and can alleviate the crack formation or expansion. According to the extrusion forming, a layer of cold working hard bottom layer is formed on the surface of extrusion forming, which reduces the ductility and plastic deformation of the cutting pair touching the surface layer, and then improves The wear resistance of the inner cavity of the special-shaped steel pipe was studied to prevent the damage caused by cutting. After extrusion, the reduction of surface roughness can improve the characteristics of profiled steel pipe.

Extrusion forming is a kind of non cutting processing. In normal temperature, the plastic deformation of metal materials is used to smooth the external economic unevenness of the surface layer of the product, so as to change the surface structure, mechanical equipment characteristics, appearance and specifications. Therefore, this kind of method can achieve the purpose of mold processing and strengthening.

Extrusion molding is a kind of working pressure casting process, which uses the cold plastic deformation characteristics of metal materials at room temperature, and uses special tools for extrusion molding to press the surface layer of the product workpiece, so that the metal material on the surface of the product workpiece causes plastic deformation fluidity, and fills in the initial residual low-lying trough, so as to reduce the surface roughness of the product workpiece. Because of the plastic deformation of the extruded surface metal material, the surface mechanism is hardened and the crystal is narrowed, resulting in high-density fiber and internal stress layer, which improves the strength and compressive strength The wear resistance, corrosion resistance and mutual compatibility of the surface layer of the products are improved. Extrusion forming is a kind of plastic deformation processing method without drilling.

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