Precision seamless pipe is a high-precision steel pipe material processed by cold drawing or hot rolling. Due to the characteristics of no oxide layer on the inner and outer walls of the precision steel pipe, no leakage under high pressure, high precision, high finish, no deformation in cold bending, flaring, flattening and no cracks, etc. Therefore, it is mainly used to produce pneumatic or hydraulic components, such as cylinders or oil cylinders. It can be seamless pipe or welded tube The chemical composition of precision steel pipe
The strength and hardness of precision seamless steel pipe materials increase, and the plastic deformation recrystallization temperature increases, but the plasticity and toughness decrease. Also known as work hardening. The reason is that during the plastic deformation process of the precision seamless steel pipe, the grain slips, dislocation entanglement occurs, slender, broken and fibrous grains, and the internal residual stress of the precision seamless steel pipe is generated. The degree of processing and the depth of the surface layer of the processed and hardened layer are generally expressed than the quenched hardness.
Work hardening is a method of strengthening precision seamless steel pipes and alloys with the process method (after cold working, the strength increases significantly after decay or after alloying). Under the premise that the cold stamping process method is possible, it is beneficial to the forming and processing of stainless steel pipes, and alloy gold is not suitable for strengthening through heat treatment.
After cold drawing, rolling and shot peening, the surface strength of precision seamless steel pipe materials, parts and components can be significantly improved. The partial stress, which often exceeds the yield limit of the material in some parts of the local stress, is caused by plastic deformation. Due to work hardening, the development of continued plastic deformation is limited, which can improve the safety of parts. Accompanied by stamping, the precision seamless steel pipe parts are strengthened by plastic deformation, and the deformation is transferred to the surrounding non-hardened parts. Through such repeated alternating supercooled stamping deformation, there is a uniform cross section.
The cold work hardening of precision seamless steel pipe can improve the cutting performance of low carbon steel, and the cutting is easy to separate. But the work of precision seamless steel tubes is hardened for further processing. Such as cold-drawn steel wire, due to work-hardening further draws with high energy consumption, and is even destroyed, so it is necessary to eliminate work-hardening by intermediate annealing, and then draw. When cutting the surface layer of hard and brittle workpieces, and increasing the cutting force of cutting speed, tool wear and so on.
The strength and hardness of precision seamless steel pipe materials increase, and the plastic deformation recrystallization temperature increases, but the plasticity and toughness decrease. Also known as work hardening. The reason is that during the plastic deformation process of the precision seamless steel pipe, the grain slips, dislocation entanglement occurs, slender, broken and fibrous grains, and the internal residual stress of the precision seamless steel pipe is generated. The degree of processing and the depth of the surface layer of the processed and hardened layer are generally expressed than the quenched hardness.
Work hardening is a method of strengthening precision seamless steel pipes and alloys with the process method (after cold working, the strength increases significantly after decay or after alloying). Under the premise that the cold stamping process method is possible, it is beneficial to the forming and processing of stainless steel pipes, and alloy gold is not suitable for strengthening through heat treatment.
After cold drawing, rolling and shot peening, the surface strength of precision seamless steel pipe materials, parts and components can be significantly improved. The partial stress, which often exceeds the yield limit of the material in some parts of the local stress, is caused by plastic deformation. Due to work hardening, the development of continued plastic deformation is limited, which can improve the safety of parts. Accompanied by stamping, the precision seamless steel pipe parts are strengthened by plastic deformation, and the deformation is transferred to the surrounding non-hardened parts. Through such repeated alternating supercooled stamping deformation, there is a uniform cross section.
The cold work hardening of precision seamless steel pipe can improve the cutting performance of low carbon steel, and the cutting is easy to separate. But the work of precision seamless steel tubes is hardened for further processing. Such as cold-drawn steel wire, due to work-hardening further draws with high energy consumption, and is even destroyed, so it is necessary to eliminate work-hardening by intermediate annealing, and then draw. When cutting the surface layer of hard and brittle workpieces, and increasing the cutting force of cutting speed, tool wear and so on.
