Browse Publications Technical Papers 2018-01-1408

Development of New Modified “Super Saturated NitroCarburizing” for Modern High Pressure Injector in Powertrain 2018-01-1408

The aim of this work is to investigate the current carburizing heat treatment and subsequently to develop new modified heat treatment with increase of surface hardness and corrosion resistances for next generation of injector parts. Considered parts are stopper (SUS303) and position ring (1.4305) of high pressure injector in powertrain.
At first, current carburized components are investigated and resulted: hardness (HV100 mN) 802-959, layer thickness of 17.85-24.59 μm, corrosion resistance was maximum 1 hour at 8.25% NaClO solution.
New modified heat treatment is Super Saturated NitroCarburizing (SSNC) which is generated with nitrogen and carbon sourcing gas in temperature range of 350-450°C. The process in detail is: nitrogen purging and heating, activation at 360°C for 1 hour, heating, nitrocarburizing at 450°C for 9 or 12 hours, and cooling. The nitrogen rich S-phase was formed at surface and carbon rich S-phase was formed at subsurface. As a result, the SSNC layer had 1,316-1,407 HV100 mN, thickness of 20.4-22.95 μm. Their corrosion resistance was approximately 3.5 times more resistant than the current one.
In conclusion, the new modified SSNC heat treatment showed higher hardness of at least 300 HV100 mN and 3.5 times better corrosion resistance than current carburizing.


Subscribers can view annotate, and download all of SAE's content. Learn More »


Members save up to 18% off list price.
Login to see discount.
Special Offer: Download multiple Technical Papers each year? TechSelect is a cost-effective subscription option to select and download 12-100 full-text Technical Papers per year. Find more information here.
We also recommend:

Development of Electropolishing-Based Corrosion Resistance Technique for Ferritic Stainless Steel


View Details


Optimizing Automobile Flexible Exhaust Coupling Performance with Inconel Alloy 625LCF


View Details


Application and Performance Characteristics of Aluminum Armor Plate for the Hull Construction of Current and Future Military Tactical Vehicles


View Details