The importance of steel in our lives is indisputable. It is so essential that steel is just about everywhere. It is in our homes, offices, cars, parks and everywhere that you can imagine. However, the steel that we observe in our daily lives is not in its original form but in fact has gone through treatment process to increase its qualities.
Forging is one of the first steel treatment methods established by mankind. The forging procedure would typically require a blacksmith with a hammer and anvil. The blacksmith also uses water to cool down the heated work piece. Rolling mills is a metal forming process in which metal stock is passed through a set of rolls. Rolling is classified based on the temperature of the metal rolled. If the temperature of the metal is above its recrystallization temperature, then the procedure is referred to as hot rolling.
However, the forging process today has undergone modernization. It no longer involves a blacksmith manually laboring away with a hammer and anvil to form the specified shape. This tiresome procedure is now replaced by either making use of presses or hydraulic or hammers driven by compressed air. Despite this, there are also hammers powered by steam and electricity too. Despite the modernization of the forging basic principal of the forging procedure remains the same.
The forging process requires a compressive stress to be put on the work piece. This would help to refine the grain structure of the work piece so they are orientated to the direction of principle stresses that the work piece will encounter during actual use. As a result, the work piece will have improved strength, ductility and sturdiness.
The forging process starts with a standard billet to be reshaped. Earlier, the forging process could only be performed for simple shapes for instance swords and blades. The reason for this is that it was difficult to produce complicated shapes correctly. Today, due to the developments in modern forging techniques, the forging procedure is not just limited to uncomplicated shapes anymore. Complicated shapes can now be forged accurately using modern presses.
There are two types of the
forging process. This is the hot forging and cold forging. The grain structure of the forged part as well as its properties is affected by the temperatures at which the forging process is performed. Hot Forging is when the forging process is performed at a temperature higher than its re-crystallization temperature. On the other hand, it is known as cold forging if it is carried out under its re-crystallization temperature.
There are a few types of the forging processes. Impact forging and press forging are two of the very popular forging processes. The hammer or load is applied by impact in impact forging. This lets the deformation to take place in a very short time. Force or pressure is continuously applied to the work piece in press forging. It can be done either by cold or hot forging
Other forging process methods consist of roll forging, swaging, cogging, open-die forging, impression-die forging, press forging, automatic hot forging and upsetting.
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