应用

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.

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 - 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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Precision Parts  

• 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

Mechanical components - Nitriding

• Gears
• Gun barrels
• Pinions
• Shafts

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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