What works hot?
Hot Working is a term for heating steel or other metals and then rolling, stamp or hammer to the desired shapes. Metal heating above their critical point, where metal crystals can flow as very strong liquids, reduce tension and facilitate vial or shape. Metal working with hot can be less fragile or less likely to burst than metals that are processed cold. When most of the metals are at room temperature, the crystals are firmly packed together and the metal is considered rigid. If the metal heats up above its crystallization temperature, referred to as a critical point, the crystals will lose the grip together and the metal will flow or can be easily shaped. This happens because the troops cannot move around them and want to return to lower voltage. Cold shape can be compared to the rubber zone stretching, with crystals under stress. Metals can be heated later in a process called annealing, where the metal warms up to a high temperature, holds and then pOMALA cools to reduce tension. Hot work prevents this stress and facilitates metal.
When metal crystals roll hot metals, they will slide along the other and change the shape from circular to long and thinner shapes. This change can intensify the metal in the direction of crystals, but weaker if the force is added opposite the direction. Rolled metals can be annealing to restore part of the original shape of the crystal, which strengthens the metal.
work at higher temperatures creates a towing metal, which is a metal that can bend or less Brittle. The ductility can be a disadvantage for parts that require high impact, such as tools or blades. Hot work may be followed by temperament, which is followed by rapid cooling in water or oil to regain part of the toughness of the metal metal for cold.
One disadvantage of work is the temperature needed to achieve a critical point of some metals. Some high -hairedNo steels may require heating to very high temperatures in order to work without creating metal stresses. These temperatures may require special machinery capable of maintaining their own strength and toughness when exposed to high metal temperatures. This equipment may also require high -temperature heating circuits on cylinders or pressing works to keep the metal hot and prevent colds.