Browse Publications Technical Papers 2000-01-1000
2000-03-06

Cost Reduction Processes for Transfer Case Sprockets: Part 1: Metallurgical Aspects 2000-01-1000

Transfer case sprockets usually require quenching to improve hardness and mechanical properties. This additional process step can be avoided with sinter hardening. Indeed, sinter hardening allows the production of P/M parts with high strength and apparent hardness directly from sintering because the martensitic transformation takes place during the cooling portion of the sintering operation. Therefore, this process eliminates the need for a post-sintering heat treatment with all the inherent related problems such as part distortion, oil contamination and added processing costs. Many low alloy steel powders have been developed for sinter hardening applications. These materials, combined with the availability of sintering furnaces equipped with enhanced cooling capacity, make sinter hardening particularly attractive for parts that are difficult to quench because of their size and shape. Moreover, the powder mix formulation and processing conditions can be tailored to achieve a specific microstructure.
The objective of this paper is to review the metallurgical aspects involved in sinter hardening and to relate these to the characteristics of the base powder, admixed additions and processing conditions in order to develop appropriate mix formulations for the production of transfer case sprockets.

SAE MOBILUS

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

Access SAE MOBILUS »

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:
TECHNICAL PAPER

Quality Assurance Procedures for Powder Forged Materials

830364

View Details

TECHNICAL PAPER

Optimization of Casting Parameters on an Improved AA6061 Aluminum Alloy for Semi-Solid Die Casting

2010-01-0225

View Details

TECHNICAL PAPER

Microalloy Steel for Pitman Arm Forgings

2002-01-1002

View Details

X