Paper Titles
SCC Inhibitors for SG Tube Materials in Nuclear Power Plants
p.717
Sintered Duplex Stainless Steels Corrosion Properties
p.721
Sintered Structural Cu-Ni-Mo-C Low Alloyed Steels with Small Niobium Additions
p.725
Sintering Processing of Compressor Flanges
p.729
Sintering Stainless Steels with Boron Addition in Nitrogen Base Atmosphere
p.733
Stable and Unstable Crack Growth in Chromium Pre-Alloyed Steel
p.737
Strain Hardening Behaviour of PM Alloys with Heterogeneous Microstructure
p.741
Stress Corrosion Cracking of Alloys 600, 690, and 800 in a Tetrathionate Solution at 340°C
p.745
Study of Elastic Moduli of Sintered Low Alloy Steels by Acoustic Pulse Method
p.749

Sintering Stainless Steels with Boron Addition in Nitrogen Base Atmosphere

Article Preview

Abstract:

Stainless steel has become increasingly used in the nuclear industry recently. Thus, this study is aimed at investigating stainless steel 316L with boron addition and the possibility of sinter these materials in nitrogen rich atmospheres. By analyzing the final product, the properties of the stainless steel 316L (good mechanical properties and high corrosion resistance) with the boron neutron absorption properties were found to unify. The P/M technologies enable higher boron quantities to be added to the steel. This was not possible with the solidification conventional technologies, as segregation is produced in the latter. Mixtures with 0.75 and 1.5% boron were prepared. Uniaxial compaction (at 700 MPa) was carried out to study the green density of compacted materials. The sintering atmosphere used was N2-10%H2-0.1%CH4, and was used to form boron nitrides instead of chromium nitrides. Although some boron nitride was formed, not all chromium nitride formation was avoided. The sintered samples were characterized through their physical properties (density and dimensional change), chemical analysis (carbon and nitrogen contents), mechanical behavior (bending strength and hardness) and wear behavior. To finish the materials characterization, a microstructural study is proposed. Lastly, the wear tracks were observed by SEM. Boron nitride has precipitated in grain boundaries, making more difficult the sintering of the material and reducing the properties of the stainless steel.

You might also be interested in these eBooks
Progress in Powder Metallurgy View Preview

Info:

Periodical:

Materials Science Forum (Volumes 534-536)

Pages:

733-736

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.534-536.733

Citation:

Cite this paper

Online since:

January 2007

Authors:

J. Abenojar, D. Esteban, M.A. Martinez, Francisco Velasco

Keywords:

Boron, Service Performance, Stainless Steel (SS)

Export:

RIS, BibTeX

Price:

Permissions CCC:

Request Permissions

Permissions PLS:

Request Permissions

Сopyright:

© 2007 Trans Tech Publications Ltd. All Rights Reserved

Share:

Citation:

References

[1] J. Abenojar, F. Velasco, A. Bautista, J.M. Torralba, M.A. Martínez, N. Antón and J.A. Calero, in: Actas del VIII Congreso Nacional de Propiedades Mecánicas de Sólidos, edited by UPV, Valencia, Spain, (2002), p.225.

Google Scholar

[2] M. Selecka, A. Salak and H. Danninger: J. Mater. Proc. Tech. Vol. 141 (2003), p.379.

Google Scholar

[3] R.J. Causton, J.S. Oh and A. Lawley: Adv. Powder Metall. & Particulate Mater. Vol. 2 (1999), p.3.

Google Scholar

[4] J. Liu, R. M. German, A. Cardamone, T. Potter and F. J. Semel: Int. J. Powder Metall. Vol. 37 (2001), p.39.

Google Scholar

[5] A. Molinari, T. Pieczonka, J. Kazior, S. Gialanella and G. Straffelini: Metall. Mater. Trans. A Vol. 31 (2000), p.1497.

DOI: 10.1007/s11661-000-0160-9

Google Scholar

[6] M. Selecka, A. Salak, H. Danninger and L. Parilak, in: Proceedings of 2000 Powder Metallurgy World Congress, edited by JPMA, Kyoto, Japan (2000), p.16.

Google Scholar

[7] R. Tandon and R. M. German: Int. J. Powder Metall. Vol. 34 (1998), p.40.

Google Scholar

[8] F. Velasco, W.M. Lima, N. Antón and J. Abenojar: Tribol. Int. Vol. 36 (2003), p.547. BBNN BB++FFee22OO33 FFee22OO33 CCrr22OO33.

Google Scholar