Cost Reduction Processes for Transfer Case Sprockets: Part 2: Processing Variables

The influence of sintering parameters on mechanical properties of three different sinterhardenable grades of powder has been studied. Dimensional change, hardness, strength, and microstructure of specimens were evaluated in different sintering conditions, such as temperature, belt speed, and cooling rate. Conclusions were used to convert a major line of sprockets from a traditional mold, sinter, size, and quench process to a cost effective mold and sinterhard one. Mechanical tests, such as crush tests and engine tests were performed on real parts manufactured using both processes, confirming the validity and the benefits of this conversion.