Accession Number:

ADA036983

Title:

The Effects of Sintering Parameters and Particle Size Distributions on P/M Steel Forgings

Descriptive Note:

Technical rept.

Corporate Author:

ROCK ISLAND ARSENAL IL GENERAL THOMAS J RODMAN LAB

Personal Author(s):

Report Date:

1976-12-22

Pagination or Media Count:

48.0

Abstract:

The effects of sintering parameters and particle size distributions on the properties of steel PM 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 PM steel forging properties. The tensile and yield strengths of the PM 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

Subject Categories:

  • Properties of Metals and Alloys
  • Fabrication Metallurgy

Distribution Statement:

APPROVED FOR PUBLIC RELEASE