FORGINGS – CMT Group

FORGING COMPONENTS

Forging Types (Hot & Warm)

Forging through hammer is the modern-day version of the pre-industrial blacksmiths work, with a hammer and chisel.

The action of the hammer is that of an instantaneous application of pressure in the form of a sudden repeated blow. This metal forming process works when a piece of metal is inserted into a die and then hammered until it has assumed the shape of the die, or it can be manipulated manually without a die. The lower die is a stationary part, while the upper part is a moving hammer dropped onto the workpiece to form it to a near-net shape. Hammer forgings have been continuously used for both OPEN DIE and impression die forging. They are generally considered the most flexible in the variety of forging operations.

Forging through Press

Forging through Press Press forging may be defined as the process of shaping a metal that is placed between two dies by applying mechanical pressure or hydraulic pressure.

Press forging is a variation on the forging process. Rather than the metal workpiece being ‘hit’ with a single or multiple blow, the forming process is more akin to the kneading of bread. A high-power press is used to squeeze the metal into a new shape or section size. Press forging is most commonly used as the first shaping process of large, cast ingots to close-up any internal voids and make a bar more suitable for further forging. After press forging, the metal workpiece will normally be returned to a reheat furnace, to bring it up to temperature ready for hammer or die forging.

Forging through RING ROLLING

Ring Rolling Forging, also known as roll forming, is a forging technique that involves shaping a metal object with opposing rollers. Although roll forging uses rolls to achieve material deformation, it is a discrete process, not a continuous one, analogous to metal forging rather than metal rolling.

Ring forging is frequently done in a heated environment. The roll’s grooves are carefully designed to forge the part to the desired dimensions.

The forging geometry of the rings used to forge metal items is only visible on a small fraction of the diameter of the ring. Only a portion of a full ring revolution is required to forge the workpiece.

Heat Treatment

Heat treating is used to alter and improve the physical properties of a given material using a heat treat furnace. Typical heat treatment techniques applied to steel forgings include annealing, normalizing, quenching, and tempering. Precipitation hardening applies to superalloys, titanium and some PH stainless steels.

Heat Treatment is one of the main value added services CFS Forge offers for steel forgings. Heat treatment is a post treatment method that aims to change the mechanical properties of produdcts for better working performance. All the steel forgings can be heat treated after forging.

The heat treatment after closed die forging plays an important role in developing the desired properties such as the relieving of internal stresses, the refinement of grain structure, and the attainment of improved mechanical and physical properties. For machinability, CFS Forge supplies forgings in the annealed, normalized, normalized and tempered, process annealed, spheroidized or full annealed condition. The steel forgings may then be quenched and tempered to achieve the final desired properties. Below we will introduce some of the common heat treatment methods after forging available at CFS Forge.