The strength and hardness of fine seamless steel tube increase, and the recrystallization temperature of plastic deformation decreases, but the plasticity and toughness decreases. Also known as cold hardening. The reason is that in the plastic deformation process of fine seamless steel tube, grain slips, dislocation entanglement, slender, broken and fibrous grain, and residual stress produced by fine seamless steel tube. The degree of hardness is usually expressed by the degree of hardening and the depth of the hardening layer on the surface.
Cold work hardening is a way to strengthen fine seamless steel pipe and alloy with process method (after cold working, the strength of seamless steel pipe is obviously improved, decayed or alloy), and then cold stamping process method is possible, which is conducive to the formation and processing of stainless steel pipe, alloy gold, not suitable for heat treatment and strengthening.
After cold drawing, rolling and shot peening treatment can significantly improve the appearance strength of fine seamless steel pipe information, parts and components. The local stress often surpasses some parts of the stress that the data yield to the limit. Plastic deformation is caused by plastic deformation. Due to the limitation of work hardening, the development of plastic deformation can improve the safety of parts. Accompanied by stamping and plastic deformation strengthening, fine seamless steel tube parts are transferred to non-hardening local deformation around them. After such repeated alternating supercooling stamping deformation, there is an average cross section.
The cold working hardening of fine seamless steel tube can improve the cutting performance of low carbon steel, and the cutting is easy to separate. But the work of fine seamless steel tube further processing difficult hardening. For example, cold-drawn steel wire, due to the further high energy consumption of work hardening, and even destroyed, so it has to be annealed in the middle to eliminate work hardening, and then draw. When cutting the surface of hard and brittle workpiece, and increase the cutting speed of cutting force, tool wear and so on.