A new corrosion resistant, martensitic stainless steel for improved performance in miniature bearings

Tomasello, C M; Maloney, J L; Materkowski, J P; Ward, P C

Title: A new corrosion resistant, martensitic stainless steel for improved performance in miniature bearings

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Abstract

A new alloy, 440 N-DUR{trademark} has been developed which will provide the corrosion resistance of 440C with improved carbide size and distribution for noiseless miniature precision bearing operation. The alloy may be through hardened to achieve a minimum hardness of 60 HRC. Its nominal composition is 0.65 wt.% C, 14.5 wt.% Cr, 0.30 wt.% Si, 0.45 wt.% Mn and 0.10 wt.% N{sub 2}. The development of the alloy is a result of a factorial experimental design including 17 alloy variants. The optimum alloy provides a combination of the best carbide structure, corrosion resistance and heat treat response. The addition of nitrogen combined with this carbon and chromium content improves the alloy`s hardenability and corrosion resistance. The alloy successfully withstands copper sulfate exposure and is currently being tested in several bearing applications. It also has great potential to outperform 440C and other corrosion resistant alloys for other ambient and low temperature applications because of its improved microstructure and heat treat response.

Authors:

Tomasello, C M; Maloney, J L; Materkowski, J P ^[1]; Ward, P C ^[2]

Latrobe Steel Co., Latrobe, PA (United States)
MPB Corp., Keene, NH (United States)

Publication Date:: Thu Dec 31 00:00:00 EST 1998

OSTI Identifier:: 316183

Report Number(s):: CONF-9611259-
ISBN 0-8031-2421-X; TRN: IM9908%%263

Resource Type:: Conference

Resource Relation:: Conference: Symposium on bearing steels: into the 21st century, New Orleans, LA (United States), 19-21 Nov 1996; Other Information: PBD: 1998; Related Information: Is Part Of Bearing steels: Into the 21. century; Hoo, J.J.C. [ed.] [General Bearing Corp., West Nyack, NY (United States)]; Green, W.B. Jr. [ed.] [Torrington Co., Torrington, CT (United States)]; PB: 534 p.; ASTM special technical publication, Volume 1327

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE; STAINLESS STEELS; CORROSION RESISTANCE; BEARINGS; MINIATURIZATION; HARDNESS; CHEMICAL COMPOSITION; MICROSTRUCTURE; HEAT TREATMENTS

Citation Formats


                    Tomasello, C M, Maloney, J L, Materkowski, J P, and Ward, P C. A new corrosion resistant, martensitic stainless steel for improved performance in miniature bearings.  United States: N. p., 1998. 
        Web.

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                    Tomasello, C M, Maloney, J L, Materkowski, J P, & Ward, P C. A new corrosion resistant, martensitic stainless steel for improved performance in miniature bearings.  United States.

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                    Tomasello, C M, Maloney, J L, Materkowski, J P, and Ward, P C. 1998.  
        "A new corrosion resistant, martensitic stainless steel for improved performance in miniature bearings".  United States.

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@article{osti_316183,

  title        = {A new corrosion resistant, martensitic stainless steel for improved performance in miniature bearings},

  author       = {Tomasello, C M and Maloney, J L and Materkowski, J P and Ward, P C},

  abstractNote = {A new alloy, 440 N-DUR{trademark} has been developed which will provide the corrosion resistance of 440C with improved carbide size and distribution for noiseless miniature precision bearing operation. The alloy may be through hardened to achieve a minimum hardness of 60 HRC. Its nominal composition is 0.65 wt.% C, 14.5 wt.% Cr, 0.30 wt.% Si, 0.45 wt.% Mn and 0.10 wt.% N{sub 2}. The development of the alloy is a result of a factorial experimental design including 17 alloy variants. The optimum alloy provides a combination of the best carbide structure, corrosion resistance and heat treat response. The addition of nitrogen combined with this carbon and chromium content improves the alloy`s hardenability and corrosion resistance. The alloy successfully withstands copper sulfate exposure and is currently being tested in several bearing applications. It also has great potential to outperform 440C and other corrosion resistant alloys for other ambient and low temperature applications because of its improved microstructure and heat treat response.},

  doi          = {},

  url          = {https://www.osti.gov/biblio/316183},
  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {Thu Dec 31 00:00:00 EST 1998},

  month        = {Thu Dec 31 00:00:00 EST 1998}

}

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