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An Alternative to Obtaining Ferritic Stainless Steel P/M Parts with Exceptional Magnetic Properties and Corrosion Resistance
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Abstract
An alternative process or material that exhibited excellent magnetic properties and corrosion resistance after submersion in a 5% salt solution for 1000 hours was introduced. Additional work has indicated this material can be an alternative to prealloyed ferritic stainless steels. Although prealloyed ferritic stainless steels exhibit magnetic properties comparable to wrought alloys, corrosion resistance has been less than desirable. Most prealloyed stainless steels do not sustain 100 hours in a 5% salt solution.
This paper describes a mixture of elemental iron powder with 10 micron chromium powder to formulate an alloy of 430 composition upon sintering. Conditions for compacting the elemental mixture are compared with prealloyed 434L powder. Green properties, magnetic properties, and corrosion resistance related to compaction pressure, with an interpretation of results, are provided.
Authors
Citation
Moyer, K., Winter, F., Dahlgren, H., and Zeigler, W., "An Alternative to Obtaining Ferritic Stainless Steel P/M Parts with Exceptional Magnetic Properties and Corrosion Resistance," SAE Technical Paper 950392, 1995, https://doi.org/10.4271/950392.Also In
References
- Moyer, Kenneth H. Jones William R “Stainless Steels for Improved Corrosion Resistance” Advances In Powder Metallurgy 4 145 158 Metal Powder Industries Federation Princeton, New Jersey 1991
- ASTM Designation A838 Standard Specification for Free Machining Ferritic Stainless Soft Magnetic Alloys for Relay Applications ASTM 1916 Race Street, Philadelphia, Pennsylvania
- Moyer, Kenneth H. Ryan J. B. “Emerging P/M Alloys for Magnetic Applications” Modern Developments In Powder Metallurgy 18 757 772 Metal Powder Industries Federation Princeton, New Jersey 1988
- ASTM Designation A596 Standard Test Method for Direct-Current Magnetic Properties of Materials Using the Ballistic Method and Ring Specimens ASTM 1916 Race Street, Philadelphia, Pennsylvania
- Klar, Erhard Svilar Mark Lall Chaman Tewes Herbert “Corrosion Resistance of Austenitic Stainless Steels Sintered in Commercial Furnaces” Advances In Powder Metallurgy 5 4ll 426 Metal Powder Industries Federation Princeton, New Jersey 1992