The Effects of Sintering Parameters and Particle Size Distributions on P/M Steel Forgings
Abstract
The effects of sintering parameters and particle size distributions on the properties of steel P/M forgings were investigated. Sintering parameters studied were hydrogen flow rate, methane flow rate, and sintering time and temperature. Various unimodal and bimodal particle size distributions designed from statistically determined powder blends were investigated in the powder distribution study. Oxygen content and final density in the forgings strongly depend on the proper selection of the sintering parameters. Among the sintering parameters studied, hydrogen flow rate and temperature predominately influence the final P/M steel forging properties. The tensile and yield strengths of the P/M forgings were not sensitive to particle size distribution differences. Ductility and impact properties, however, improve with small particle size distributions. The increase in the ductility and impact properties correlates with lower oxide content, which in turn, is attributed to the decrease in oxide inclusions present in the powder particles. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 22, 1976
- Accession Number
- ADA036983
Entities
People
- Andrew Crowson
- Ferrel E. Anderson