Hot rolling**** is rolling above the recrystallization temperature, while cold rolling is rolling below the recrystallization temperature. Different processing methods have different characteristics. ****Wuxi seamless steel pipe manufacturer to share with you What is the difference between hot working and cold working of seamless steel pipes?
1. Hot rolling is rolling above the recrystallization temperature, and cold rolling is rolling below the recrystallization temperature.
2. Cold rolling is sometimes heated, but the temperature is relatively low, because work hardening will occur after cold rolling. If the material forming requirements are higher, annealing should be carried out.
3. Cold-rolled and hot-rolled are generally plates or profiles, while cold-drawn are generally cylindrical cross-section wires. In addition, hot-rolled plates are generally steels with higher alloy content and higher strength, while cold-rolled steels are low-carbon and low-alloy steels. Cold rolling can improve the strength and improve the surface quality of the material.
4. The difference between cold-drawn seamless steel pipe and hot-rolled seamless steel pipe is different from the plate.
Seamless steel pipes are divided into two types, hot-rolled (extruded) seamless steel pipes and cold-drawn (rolled) seamless steel pipes due to their different manufacturing processes.