Paper Title:
Phase Changes in AISI 436L Ferritic Stainless Steel after Nitrogen Permeation Heat Treatment
  Abstract

This study examined the phase changes, nitride precipitation and variations in hardness of Fe-18Cr-1Mo-0.2Ti (436L) ferritic stainless steels after a nitrogen permeation heat treatment at temperatures ranging from 1050°C to 1150°C. The strong affinity between nitrogen and Ti/Cr enabled the permeation of nitrogen into the 436L ferritic stainless steels. The nitrogen content of the surface layers ranged from 0.40% to 0.87%, depending on the nitrogen permeation temperatures. The nitrogen-permeated surface layers changed into martensite plus retained austenite(RA) with rod type M2N and square type TiN precipitates. Ups and downs of hardness with increasing depth below the surface was observed, depending on the volume fraction of the RA, nitrogen content and quantity of precipitates. The maximum hardness of the nitrogen permeated surface layer was 700Hv.

  Info
Periodical
Advanced Materials Research (Volumes 26-28)
Edited by
Young Won Chang, Nack J. Kim and Chong Soo Lee
Pages
1303-1306
DOI
10.4028/www.scientific.net/AMR.26-28.1303
Citation
H. J. Lee, J. H. Kong, D. K. Yoo, Y. C. Park, J. H. Sung, "Phase Changes in AISI 436L Ferritic Stainless Steel after Nitrogen Permeation Heat Treatment", Advanced Materials Research, Vols. 26-28, pp. 1303-1306, 2007
Online since
October 2007
Export
Price
$35.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Mu Qin Li, Da Shan Shang, Chen Ma, Shi Qin Yang
Abstract:Bioactive composite coatings containing sub-layer and working-layer with different ingredients were prepared using subsonic thermal spraying...
1619
Authors: Yoshifumi Iwasaki, Yuji Nakasone
Abstract:The present study has investigated plasticity-induced martensitic phase transformation in fatigue of unnotched SUS304 plates. Martensitic...
1152
Authors: De Liang Ren, Fu Ren Xiao, P. Tian, X. Wang, L.Y. Zhang, Bo Liao
Abstract:With the development of high toughness pipeline, it is necessary to develop new welding wires for high-efficiency submerged-arc welding, to...
385
Authors: Zhen Bing Cai, Min Hao Zhu, Xiu Zhou Lin, Ji Liang Mo, Zhong Rong Zhou
Abstract:Nickel base Ni60 and cobalt base Co-Cr-W coatings were prepared on substrate of refractory alloy steel 4Cr14NiW2Mo by laser-cladding...
878
Authors: Qiang Shen, Chang Lian Chen, Fei Chen, Qi Wen Liu, Lian Meng Zhang
Abstract:Porous calcia stabilized zirconia ceramics (CSZC) with closed pores were presurelessly sintered by adding different contents of zirconia...
435