Properties of high nitrogen steels produced by high pressure gas atomization

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The production of metal powder by gas atomization typically combines melting at ambient pressure and atomization through high pressure gas jet nozzles into an atomization chamber, also at ambient pressure. To achieve high nitrogen contents, a series of Fe-Cr-Mn-Ni steels were melted under nitrogen pressures of 150 psi and atomized with nitrogen gas into an atomizing chamber held at 100 psi. A small scale atomizing unit (charge size 300 lbs) was modified to achieve the desired production characteristics. High nitrogen steels produced by high pressure gas atomization exceeded the atmospheric solubility limit of nitrogen by as much as 500% and ... continued below

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Dunning, John S. October 1, 2000.

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The production of metal powder by gas atomization typically combines melting at ambient pressure and atomization through high pressure gas jet nozzles into an atomization chamber, also at ambient pressure. To achieve high nitrogen contents, a series of Fe-Cr-Mn-Ni steels were melted under nitrogen pressures of 150 psi and atomized with nitrogen gas into an atomizing chamber held at 100 psi. A small scale atomizing unit (charge size 300 lbs) was modified to achieve the desired production characteristics. High nitrogen steels produced by high pressure gas atomization exceeded the atmospheric solubility limit of nitrogen by as much as 500% and nitrogen contents between 0.5 to 1.3 wt. pct. was achieved. Three Fe-Cr-Mn-Ni alloys each different nitrogen contents were atomized and consolidated by hot-extrusion. The microstructure and tensile properties were evaluate and correlated to conditions during atomization, extrusion and final nitrogen content.

Notes

From publisher - in Proceedings entitled Powder Metallurgy and Particulate Materials for Industrial Applications (Proceedings), ed. by D.E. Alman and J. W. Newkirk, TMS, Warrendale, PA, (2000), ISBN 0-97339-338-8, pp. 105-110

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  • 2000 TMS (The Minerals, Metals & Materials Society) Annual Fall Meeting, St. Louis, MO, Oct. 8-12, 2000

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  • Report No.: DOE/ARC-2001-037
  • Grant Number: None
  • Office of Scientific & Technical Information Report Number: 900347
  • Archival Resource Key: ark:/67531/metadc881714

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  • October 1, 2000

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  • Sept. 22, 2016, 2:13 a.m.

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  • Nov. 4, 2016, 2:04 p.m.

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Dunning, John S. Properties of high nitrogen steels produced by high pressure gas atomization, article, October 1, 2000; (digital.library.unt.edu/ark:/67531/metadc881714/: accessed August 22, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.