Forging Hot & Cold

At Sigma HTS, parts of complex shapes can be forged with uniform grain size and flow to ensure fatigue resistance & maximum impact strength within the parts. Sigma has its expertise in both hot forging and cold forging processes.

HOT FORGING

The hot forging section of Sigma is in its development stage and has been planned in such a manner that Sigma is able to form and cater to some of the most critical shapes, in order to fulfill diverse customer demands

Presses available: 630 ton | 400 ton | 160 ton
Presses under plan: 2200 ton | 1000 ton

COLD FORGING

Cold forging typically refers to forging a particular metal at room temperature and in order to facilitate this process, we have two cold forging presses. These two presses have five station forming capabilities which enables them to form even the most critical of shapes with ease

MACHINING

Sigma is capable of achieving varied kinds of geometrical features through our high accuracy CNC machines. Our machining division is setup with twelve world class CNC turning machines that assist in the formation of complex profiles on the work piece. These machines come with interchangeable work piece holdings and can turn work pieces of up to 200 mm in diameter, with a length of up to 300 mm

Sigma has a zeal to embrace continual automation

The management and all employees have welcomed, adopted and institutionalized automation into our daily processes and workings. Thinking of automation, Sigma has also implemented a gantry system – in order to facilitate automatic loading and unloading of components, to and from the CNC machines

HEAT TREATMENT

Sigma began its business operations from the heat treatment segment and has made an imprint and carved out a market share for itself due to customer satisfaction received from this segment. We have also been able to develop an edge over our competitors due to the beyond par quality delivered for certain challenging projects such as – complex rail road components

SQF (Sealed Quench Furnaces)

We have fourteen SQF’s (sealed quench furnaces) that help us achieve world class quality and enables us to cater to various processes such as carburizing, carbonitriding and hardening. Nine of our eleven SQF’s have a capacity of 1250 kgs per batch, while the other five can cater to 1500 kgs per batch

RHF (Rotary Hearth Furnaces)

In addition to the above, we also have three RHF’s (rotary hearth furnaces) with plug quench presses, with a joint capacity of 1000 kgs per hour in order to facilitate our hardening and tempering processes

RRF (Rotary Retort Furnaces)

We have three rotary retort furnaces for carburizing, with a capacity of 900 kg per batch

DHF (Direct Hardening Furnaces)

Our plant also has two DHF’s for continuous hardening and tempering of small sized components which are large in volume such as rollers, nails, etc

Heat treatment services offered by us

Carburizing

Also referred to as Case Carburizing , it is a type of heat treatment process that forms a major part of Sigma’s business activities. This type of heat treatment is also applied to low carbon steel parts (post machining) as well as low alloy steel bearings, gears as well as other components.

Carbonitriding

Is a type of heat treatment process which is a modified form of case carburizing and is used for parts that have a shallow case depth

Hardening

Being the most common form of heat treatment, hardening is an integral process of Sigma. Sigma specializes in automated plug hardening of large sized bearing cups & cones through the use of robotically operated rotary hearth furnaces and plug quench presses

Tempering

A post-hardening procedure that aims at relieving the stress placed on hardened components is done using five of our best in-class continuous mesh-belt tempering furnaces