Heat Treating and Surface Treating - Heat Treating Solutions


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Applications Expositions

By way of a dedicated commitment to R&D, years of heat treating services and close relationships with our customers from a variety of industries, Nitrex has been able to perfect its surface treating technologies.

Typical Applications

Nitrex has developed proper heat treating processes for each of these and many others.

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

Tooling
Dies and other tooling require vacuum hardening, tempering, and cryogenic treatment. This combination of processing techniques imparts excellent properties on the tool, such as long life, resistance to wear and other damage, and dimensional stability.

Landing Gear Mechanism
Aerospace specifications often call for controlled nitriding with limited white layer capable of producing deep diffusion cases on Nitralloy 135M and other alloyed steels. Such well controlled nitriding produces a hardened case that has excellent wear and toughness properties. The reduction in white layer thickness eliminates the need for costly finishing operations that might otherwise have been required.

Shafts
Properties of small shafts exposed to atmospheric conditions and/or other corrosive environments are frequently treated in an in-process post-nitriding oxidizing treatment. Such components have excellent wear and corrosion properties, as well as an attractive appearance.

Shafts (Stainless Steel)
Shafts made of stainless steel or nickel based alloys require vacuum hardening and tempering, frequently followed by nitriding.

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

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.

Piston Rings
Nitrided piston rings show high surface hardness at elevated temperatures, and good sliding wear resistance with a low coefficient of friction.

Springs
Springs are routinely nitrided at Nitrex to enhance their fatigue resistance to premature failure.

Journals
The component is delivered in an “almost” finished-machined state to one of our locations where it is subjected to such operations as buffing, sizing, nitriding, polishing, cleaning, application of R/P and inspection. The finished product is delivered to the customer’s assembly line.

Fuel Injectors
Fuel injector bodies and spray tips are vacuum hardened and nitrided.

Aluminum Extrusion Dies
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.

For a list of typical nitriding applications please click on one of the following categories.

Automotive components
Aerospace/Aviation components
Mechanical components
Tool & Die

Automotive components - Nitriding

ABS hardware

Drive Plates

Rocker Arm Shafts

Clutch springs

Engine valves

Rocker Arms (Carbon Steel)

Ball joints

Engine valve guides

Rocker Arms (Marine Engine)

Brake pistons

Fuel injectors

Seat rails

Brake pads plates

Gas springs

Shock absorbers

Cam Followers

Gasket plates

Synchronizer components

Cardan joints

Gearing for hydraulic pumps

Timing Gears

Clutch Hubs

Gearing for power generation equipment

Transmission torque converter

Clutch Plates

Hydraulic Components Of Dump-Truck Lifting Mechanisms

Rear axle ring gears

Crankshafts

Hydraulic cylinders

Suspension Springs

Cylinder block sleeves

Mechanical couplings

Valves (including exhaust valves of austenitic stainless steel)

Cylinder Liners

Piston Rings

Wiper shafts

Differential Housings (Cast Iron)

Precision valve springs

Window sectors

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Aerospace/Aviation components

Bushings
Parts of fuel injection mechanisms
Parts of landing gear
Parts of gearbox assembly
Engine components
Auxillary Power Units, Actuators
Actuators - Wing flaps
Gearing for Power Transmission
Cargo door actuators and Cargo plane floor Robotic actuators
Auxillary Power Units
Hydraulic & auxillaryPower Actuators
Aircraft Hardware

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Mechanical components - Nitriding

Gears
Gun barrels
Pinions
Shafts

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Tool & Die - Nitriding

Aluminum die casting dies
Aluminum die casting sleeves
Aluminum extrusion dies
Ejector pins
Forging dies
Forming dies
Plastic extrusion screws & other related tooling
Press dies
Tool holder

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