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HEAT TREATMENT c.c.
 
Specialists in Heat Treatment

   NITREG - POTENTIAL CONTROLLED NITRIDING
  Overview

With state-of-the-art gas nitriding process control systems designed to provide a fully automated operation, the entire nitriding process is executed in an automatic, self-adjusting and operator independent manner.

TYPICAL APPLICATIONS


CRANKSHAFT
High performance automotive and aircraft engine crankshafts are nitrided for better fatigue resistance and wear properties on bearing journals.


GEARS
Nitriding gears for applications ranging from heavy-duty machinery to small automotive accessories enables lower manufacturing costs.  For one customer, this meant eliminating costly finishing operations needed after carburizing.


FORGING / FORMING DIES
Forging and forming dies made of tool steels, alloy steels, cast steels or cast iron are a frequent visitor in a heat treating shop.  The dies are vacuum hardened and tempered, flame hardened, flood-welded and nitrided, as applicable, for better life.


ALUMINUM EXTRUSION DIE
Extrusion dies are nitrided and re-nitrided several times to extend their die life.  Nitriding parameters are adjusted to the expected die duty cycle resulting in significant cost reductions and virtual elimination of unscheduled press shutdowns.

PROCESS CONTROL HARDWARE
The process control hardware is a product of extensive research and development in process automation, and innovations in nitriding technology.  A typical system is configured in four distinct sections which facilitate operation and maintenance of the system.  They consist of:

  • Process control panel with solid state relays, computer and color monitor
  • Gas panel with atmosphere analysis, gas mixing and electronic gas flow measuring equipment.
  • Electrical panel with thyristor (SCR) controllers, contactors, fuses and switches.
  • Exhaust gas neutralizing unit.


Model NX1015

This innovative approach provides an unparalleled degree of accuracy in process execution, contributing to consistency in nitriding results and offering new possibilities in perfecting the nitriding technology.

 


PROCESS CONTROL DIAGRAM

PROCESS CONTROL
The nitriding process control is carried out in a closed loop circuit.  This, coupled with advanced features, enables the process control system to automatically respond to the changes in nitriding conditions which occur during the process.

To adjust the process parameters, the furnace atmosphere is continuously sampled and analyzed.  Based on the data extracted, the process computer adjusts the incoming atmosphere, thus maintaining the preset value of the nitriding potential as accurately as possible.