Influence of Deformation Heat Treatment on the Ultra-Fine Structure of Austenitic Stainless Steel

Abstract:

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According to accommodate-state and big bulk 18-8 type austenitic stainless steel has the weakness of coarse-grained and low strength. Optical microscopy,electron microscopy and X-ray diffraction were used to analyze microstructure and grain size of austenitic stainless steel specimens after deformation heat treatment. The paper investigates the influence of recrystallization annealing on the ultra-fine structure of cold deformation austenitic stainless steel. The results show that austenitic stainless steel can produce deformation-induced martensite by cold rolling deformation, and that the content of martensite increases with deformation degree. During the annealing, ultra-fine grains can be obtained by the reversal transformation-induced martensite(M′→ γ ). After severe cold deformation, inside austenitic grains imported austenitic-martensite(γ /M) phase boundaries shall serve to add a great deal of forming nucleus location for recrystallization, to enhance forming nucleus ratio and refine grain. 1Cr18Ni9Ti austenitic stainless steel by severe cold deformation and recrystallization annealing can acquire ultra-fine grains.

Info:

Periodical:

Materials Science Forum (Volumes 551-552)

Edited by:

K.F. Zhang

Pages:

421-425

DOI:

10.4028/www.scientific.net/MSF.551-552.421

Citation:

M. Wang and H. Z. Guo, "Influence of Deformation Heat Treatment on the Ultra-Fine Structure of Austenitic Stainless Steel", Materials Science Forum, Vols. 551-552, pp. 421-425, 2007

Online since:

July 2007

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$35.00

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