Continuous Conveyor Hardening & Tempering Plants
Furnaces for Mass Produced Components

Process Capabilities

Equipment Features

Typical Components Processed

Process Capabilities

  • Neutral Hardening & Tempering
  • Carbonitriding
  • Shallow Case Carburising
  • Austempering
  • Carbon Restoration &
    Hardening
 Continuous Hardening & Tempering Plants

Continuous Austempering PlantConsistency of quality is better obtained when components are continuously quenched, a few pieces at a time instead of in a batch at periodic intervals. Of the total tonnage of heat treated components the majority do not require fixturing and can tumble into a quench tank. The ideal plant for all such components in terms of quality, capital cost as well as operating cost is a continuous conveyorised heating and quenching system. Components spend less time at temperature and consume less energy compared to batch furnaces. Continuous quenching, a few components at a time, ensures a high degree of quality consistency in terms of hardness, case depth and physical properties. Such plants with conveyorised auxiliary equipment for loading, washing and tempering are normally fully automated.

Equipment Features

LOADING
soft handling, weigh feed, metered loading, vibratory conveyor, reciprocating feeder.

WASH MACHINES
high intensity jet spray, dunk & spray, steam wash, ultra sonic, vapour degreasing & in line centrifuge, drying, continuous dirt filtration, oil seperation/recovery, salt recovery.

FURNACE
gas tight hardening furnace shell, microporous insulation, atmosphere circulation, alloy belt with raised edges & auto alignment, electric radiant tube heaters, multizone thyristorised temperature control, gas fired recuperative radiant tubes, waste heat recovery from spent atmosphere & by hot belt return, multi atmosphere capability, endogas generator, methanol dissociater, PSA, onsite nitrogen & ammonia cracker.

QUENCHING
oil, hot oil or polymer, clog resistant cascade curtain, variable agitation, continuous dirt removal, air/water heat exchangers, air knife, electric heaters or gas tube burners, temperature, level & flow controls.

TEMPERING
high convection (high uniformity) tempering, rapid heat up feature, jet heating system, nitrogen atmosphere capability, steam tempering facility, post temper blackening tank.

CONTROLS
computer/touch screen HMI for user interface, SCADA programming based automatic plant and process control, production alarm & energy logging, several reporting formats.

UNLOADING
into bins, weigh & discharge, auto bagging with data acquisition.

EXTRAS
chiller tank (for 52100 steel parts, where required).





Typical Components Processed

bearing parts, chain parts, fasteners, springs, circlips, needles, appliance parts, auto parts, lock parts, hand tools, shoe shanks Hardening & Tempering
chain parts, screws, appliance parts, auto parts, PM parts, bicycle parts, bearing parts Carbonitriding / Shallow Case Carburising
circlips, spring washers, pen clips, auto clips, hair clips Austempering