Forging

Forging is a manufacturing process which comprises the shaping of metal by employing localized compressive drives. Forging can be categorized according to the temperature and the way it is carried out as cold, warm or hot forging. Forged parts range in weight from less than a kilogram to 580 metric tons. And these parts need more processing to accomplish a finished part. This is one of the earliest methods of metalworking processes.

Modern day forging and requirements

Conventionally, forging was carried out by a smith using just hammer and anvil and in spite of the use of water power in the production and working of iron dates to the 12^th century when the hammer and anvil are not obsolete. Forging emerged several centuries ago to become a part of engineering process, production equipment, tooling, raw materials and products to meet the requirements of present day industry. Today industrial forging is performed with presses or with hammers powered by compressed air, electricity, hydraulic or steam.

Positive characteristics

Forging can bring out a piece that is powerful than a similar cast or machined part. When the metal is formed during the process, its internal grain deforms to succeed the common shape of the part. Consequently, the grain is continuous whole of the part, producing a piece with developed positive features. Certain metals are forged cold while iron and steel are often hot forged. Hot forging stops the work hardening which would result from cold forging which would augment the complexity of carrying out secondary machining functions on the piece.

Alloys and titanium forging

When work, hardening is preferred in some instance and the ways of hardening the piece such as heat treating are commonly more economical and controllable. Alloys which are amenable to precipitation hardening like most aluminum alloys and titanium that can be forged after succeeded by hardening. Manufacturing forging comprises remarkable capital expenditure for equipments, facilities and human resource. In the event of hot forging, a high temperature furnace will be needed to heat ingots or billets.

Due to the massiveness of large forging hammers and presses and the parts they can manufacture as well as the dangers inherent in working with hot metal, a particular building is often needed to house the operation. While drop forging operations provisions must be created to soak up the shock and vibration generated by the hammer. Most of these processes will need the use of metal-forming dies that must be exactly machined and carefully heat treated to rightly form the work piece as well as to hold enormous forces involved. 

Questions:

• What is forging?
• What are the uses of forging?