S355J2 steel plate delivery status: steel plate to hot rolled, control tie, normalised and other state delivery
1, hot rolling: hot rolling (hot rolling) is relative to cold rolling, cold rolling is below the recrystallisation temperature of rolling, and hot rolling is above the recrystallisation temperature of rolling. Simply put, a piece of billet in the heating after a few rolling, and then cut edge, corrected to become a steel plate, this is called hot rolling.
2, control rolling, by controlling the heating temperature, rolling temperature, deformation system and other process parameters, to control the austenite organisation of the law of change and the organisation of the phase transition products, to achieve the refinement of the organisation, improve the strength and toughness of the purpose.
3, the concept of normalising rolling is a rolling method of final deformation within a certain temperature range. It can make the state of the material with the same supplemental normalising treatment, and the mechanical properties of the specified value is the same as the supplemental normalising.
4, normalising is heating the steel to the normalising temperature after air cooling, so that its organisational structure becomes dense and homogeneous, enhancing the hardness, strength and wear resistance of the steel, applicable to the need for higher hardness and wear resistance of the steel. This treatment is usually used in machine tools, tools and other applications that require high strength, hardness and wear resistance.
