Stable austenitic structure in medical stainless steels is basically required for surgical implantation. A weak magnetism was found in a high nitrogen nickel-free austenitic stainless steel for cardiovascular stent application. This magnetic behavior in high nitrogen stainless steel was investigated by optical microscopy, X-ray diffraction (XRD), electron probe microanalysis (EPMA) and superconducting quantum interference device (SQUID). The results showed that the magnetism came from the composition segregation of ferrite formation elements such as Cr and Mo in the steel and some δ-ferrites were locally formed during the pressurized electroslag remelting process. The magnetism of high nitrogen stainless steel could be eliminated by a proper high temperature gas nitriding (HTGN).
参考文献
| [1] | K. Mumtaz;S. Takahashi;J. Echigoya;L. Zhang;Y. Kamada;M. Sato .Temperature dependence of martensitic transformation in austenitic stainless steel[J].Journal of Materials Science Letters,2003(6):423-427. |
| [2] | W. Hiibner;A. Pyzalla;K. Assmus;E. Wild;T. Wroblewski .Phase stability of AISI 304 stainless steel during sliding wear at extremely low temperatures[J].Wear: an International Journal on the Science and Technology of Friction, Lubrication and Wear,2003(1/6):476-480. |
| [3] | Z.Z. Yuan;Q.X. Dai;Q. Zhang .Effects of temperature cycling and nitrogen on the stability of microstructures in austenitic stainless steels[J].Materials Characterization,2008(1):18-22. |
| [4] | Y. Kamada;T. Mikami;S. Takahashi;H. Kikuchi;S. Kobayashi;K. Ara .Compositional dependence of magnetic properties on thermally sensitized austenitic stainless steels[J].Journal of Magnetism and Magnetic Materials,2007(2 Pt.3):2856-2858. |
| [5] | S. Takahashi;Y. Sato;Y. Kamada .Study of chromium depletion by magnetic method in Ni-based alloys[J].Journal of Magnetism and Magnetic Materials,2004(2):139-149. |
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