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Author:

Nan, Rong (Nan, Rong.) | Fu, Hanguang (Fu, Hanguang.) (Scholars:符寒光) | Yang, Penghui (Yang, Penghui.) | Lin, Tian (Lin, Tian.) | Lei, Yongping (Lei, Yongping.) (Scholars:雷永平)

Indexed by:

EI Scopus SCIE

Abstract:

In the present study, the authors investigated the effect of the austenitizing temperature (860 to 1020 degrees C) on the microstructure evolution, hardness, wear resistance and corrosion resistance of Cu-bearing carbidic austempered ductile iron (CADI) by means of an optical microscope (OM), a scanning electron microscope (SEM), a Rockwell hardness tester, a microhardness tester, an X-ray diffractometer (XRD), a block-on-ring wear testing machine and electrochemical tester. The results show that with an increase in the austenitizing temperature, the amount of acicular ferrite decreases, size expands, and the volume fraction of high-carbon austenite increases gradually as does carbon content. Part of the carbide dissolves into the matrix, and the amount is significantly reduced. The hardness of Cu-bearing CADI first increases and subsequently decreases, and the hardness is highest at 940 degrees C. With an increase in austenitizing temperature, the wear loss of Cu-bearing decreases and its wear resistance increases. When the austenitizing temperature is 940 degrees C, wear loss is lowest and wear resistance is optimal. Electrochemical corrosion experiments show that as the austenitizing temperature increases, the corrosion potential of Cu-bearing CADI is slightly improved, the corrosion current density is gradually reduced, and the corrosion resistance of Cu-bearing CADI is improved. Considered comprehensively, the austenitizing temperature of Cu-bearing CADI should be determined to be 940 degrees C.

Keyword:

corrosion resistance austenitizing temperature Cu-bearing CADI microstructure evolution wear resistance

Author Community:

  • [ 1 ] [Nan, Rong]Beijing Univ Technol, Beijing, Peoples R China
  • [ 2 ] [Fu, Hanguang]Beijing Univ Technol, Beijing, Peoples R China
  • [ 3 ] [Yang, Penghui]Beijing Univ Technol, Beijing, Peoples R China
  • [ 4 ] [Lin, Tian]Beijing Univ Technol, Beijing, Peoples R China
  • [ 5 ] [Lei, Yongping]Beijing Univ Technol, Beijing, Peoples R China

Reprint Author's Address:

  • 符寒光

    [Fu, Hanguang]Beijing Univ Technol, Sch Mat Sci & Engn, 100 Pingle Carden, Beijing 100124, Peoples R China

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Source :

MATERIALS TESTING

ISSN: 0025-5300

Year: 2019

Issue: 9

Volume: 61

Page: 865-874

2 . 5 0 0

JCR@2022

ESI Discipline: MATERIALS SCIENCE;

ESI HC Threshold:211

Cited Count:

WoS CC Cited Count: 7

SCOPUS Cited Count: 8

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 4

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