Paper Title:
New Manufacturing Process of Nickel-Free Austenitic Stainless Steel with Nitrogen Absorption Treatment
  Abstract

Ingots of ferritic stainless steels, Fe-24Cr and Fe-24Cr-2Mo in mass%, were worked to various dimensions for test specimens. Nitrogen was absorbed by the specimens in a furnace filled with nitrogen gas with a pressure of 101.3 kPa at 1473 K to develop a simple and convenient manufacturing process of nickel-free austenitic stainless steels. Ferritic Fe-24Cr and Fe-24Cr-2Mo were austenitized with nitrogen absorption to a 2-mm depth from the surface. The hardness, tensile strength, 0.2% proof stress, and elongation to fracture increased, and the reduction of area decreased in the alloys by austenitization due to nitrogen absorption. The tensile strength and 0.2% proof stress of these alloys with nitrogen absorption for 129.6 ks were much larger than those of 316L steel, while the elongation to fracture was much smaller than that of 316L steel. Therefore, small devices and parts with a maximum thickness or diameter of 4 mm were manufactured with this process in this study

  Info
Periodical
Materials Science Forum (Volumes 449-452)
Edited by
S.-G. Kang and T. Kobayashi
Pages
1085-1088
DOI
10.4028/www.scientific.net/MSF.449-452.1085
Citation
D. Kuroda, T. Hanawa, T. Hibaru, S. Kuroda, M. Kobayashi, T. Kobayashi, "New Manufacturing Process of Nickel-Free Austenitic Stainless Steel with Nitrogen Absorption Treatment", Materials Science Forum, Vols. 449-452, pp. 1085-1088, 2004
Online since
March 2004
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