Sintering Cycle Influence on P/M Steel Forgings' Dynamic Properties
Abstract
The effects of sintering environments and their respective parameters on the dynamic properties of P/M steel forgings have been determined. Compacted preforms were sintered from 10 to 90 minutes over a range of temperatures (1100- 1370 C) in inert, vacuum, and reducing atmospheres. The final oxide content was found to vary exponentially with sintering time, sintering temperature, and gas flow-rate regardless of the type of atmosphere used. Reduction of the metal oxides was basically controlled by two factors: (1) carbon, and (2) elevated temperature. Two levels of oxide reduction were evident. The initial level involved a reduction of the majority of the metal oxides (iron, molybdenum, and nickel oxides), whereas the secondary level resulted in a slow reduction of the more thermodynamically stable oxides of manganese and chromium. Elongation, reduction in area, and impact energy values showed a corresponding increase with decreasing oxide content.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 1979
- Accession Number
- ADA075244
Entities
People
- Andrew Crowson
Organizations
- United States Army Armament Research, Development and Engineering Center