This condition often occurs in the rolling of steels and hightemperature alloys. These extreme temperatures are higher than the steel s recrystallisation temperature, meaning it can be shaped and formed more easily. Since the product is supplied directly after cold rolling without further processing, full hard cold rolled unprocessed sheet will have residual. Hot rolling is the process of rolling the steel at a high temperature usually over 935c. Quaker animation film steel cold rolling process youtube. The surface of the material will be covered with carbon scale. Rolling is an important function of the steel industry. This increases the yield strength and hardness of the metal. The amount of strain introduced determines the hardness and other material properties of the finished product. Steel correctly choosing between hot roll and cold roll first.
Profile rolling the finished product is a bar or rod. A rolling mill is a complex machine having two or more working rollers, supporting rollers, roll stands, drive motor, reducing gear, flywheel, coupling gear etc. Cold rolling is a process by which the sheet metal or strip stock is introduced between rollers and then compressed and squeezed. Therefore i hope this book will be useful in giving a general understanding of especially big components. Hot rolling is more common than cold rolling as it is cheaper and less time consuming. Hot rolling is often characterized by a condition called sticking, in which the hot work surface adheres to the rolls over the contact arc. Overview of the steelmaking process pellets sinter limestone coke iron ore coal scrap blast furnace ironmaking converter steelmaking ladle refining blast furnace steelmaking coalnatural gas plate hot rolled bars rods tube rounds rails slab billet bloom hot rolled and cold rolled strip coils structural shapes.