Effect of ammonia addition on microstructure and wear performance of carbonitrided high carbon bearing steel AISI 52100

Bin Liu, Bo Wang, Jianfeng Gu*

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

The investigation on the microstructure and tribomechanical behavior of hypereutectoid bearing steel AISI 52100 has been carried out during an unconventional thermo-chemical process aiming to improve the wear performance under dry conditions. The effects of NH3 addition rate on microstructure, hardness and wear performance of the carbonitrided specimen were characterized and the results show that two types of nitride (CrN, (Cr,Fe)2N1−x) are formed in the surface layer. The quantity of the nitride and carbide precipitates increase firstly and decrease subsequently with the increasing of NH3 addition rate, whereas the fraction of retained austenite increases monotonically. The wear performance of the carbonitrided specimen is improved during the entire stage of the sliding test with the NH3 addition rate below 0.4 l/min, but it decreases sharply at the initial stage of sliding test and then increases gradually when further raising the NH3 addition rate. The possible reasons underlying have been discussed and are attributed to the fraction of retained austenite formed during carbonitriding process and the transformation from retained austenite into martensite during sliding test, respectively.
Original languageEnglish
JournalSurface and Coatings Technology
Volume361
Pages (from-to)112-118
ISSN0257-8972
DOIs
Publication statusPublished - 2019

Keywords

  • Hypereutectoid bearing steel
  • Carbonitriding
  • Ammonia addition rate
  • Retained austenite
  • Wear resistance

Cite this

@article{c298eb45efb44d1abb000186a0b29947,
title = "Effect of ammonia addition on microstructure and wear performance of carbonitrided high carbon bearing steel AISI 52100",
abstract = "The investigation on the microstructure and tribomechanical behavior of hypereutectoid bearing steel AISI 52100 has been carried out during an unconventional thermo-chemical process aiming to improve the wear performance under dry conditions. The effects of NH3 addition rate on microstructure, hardness and wear performance of the carbonitrided specimen were characterized and the results show that two types of nitride (CrN, (Cr,Fe)2N1−x) are formed in the surface layer. The quantity of the nitride and carbide precipitates increase firstly and decrease subsequently with the increasing of NH3 addition rate, whereas the fraction of retained austenite increases monotonically. The wear performance of the carbonitrided specimen is improved during the entire stage of the sliding test with the NH3 addition rate below 0.4 l/min, but it decreases sharply at the initial stage of sliding test and then increases gradually when further raising the NH3 addition rate. The possible reasons underlying have been discussed and are attributed to the fraction of retained austenite formed during carbonitriding process and the transformation from retained austenite into martensite during sliding test, respectively.",
keywords = "Hypereutectoid bearing steel, Carbonitriding, Ammonia addition rate, Retained austenite, Wear resistance",
author = "Bin Liu and Bo Wang and Jianfeng Gu",
year = "2019",
doi = "10.1016/j.surfcoat.2019.01.019",
language = "English",
volume = "361",
pages = "112--118",
journal = "Surface and Coatings Technology",
issn = "0257-8972",
publisher = "Elsevier",

}

Effect of ammonia addition on microstructure and wear performance of carbonitrided high carbon bearing steel AISI 52100. / Liu, Bin; Wang, Bo; Gu, Jianfeng.

In: Surface and Coatings Technology, Vol. 361, 2019, p. 112-118.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Effect of ammonia addition on microstructure and wear performance of carbonitrided high carbon bearing steel AISI 52100

AU - Liu, Bin

AU - Wang, Bo

AU - Gu, Jianfeng

PY - 2019

Y1 - 2019

N2 - The investigation on the microstructure and tribomechanical behavior of hypereutectoid bearing steel AISI 52100 has been carried out during an unconventional thermo-chemical process aiming to improve the wear performance under dry conditions. The effects of NH3 addition rate on microstructure, hardness and wear performance of the carbonitrided specimen were characterized and the results show that two types of nitride (CrN, (Cr,Fe)2N1−x) are formed in the surface layer. The quantity of the nitride and carbide precipitates increase firstly and decrease subsequently with the increasing of NH3 addition rate, whereas the fraction of retained austenite increases monotonically. The wear performance of the carbonitrided specimen is improved during the entire stage of the sliding test with the NH3 addition rate below 0.4 l/min, but it decreases sharply at the initial stage of sliding test and then increases gradually when further raising the NH3 addition rate. The possible reasons underlying have been discussed and are attributed to the fraction of retained austenite formed during carbonitriding process and the transformation from retained austenite into martensite during sliding test, respectively.

AB - The investigation on the microstructure and tribomechanical behavior of hypereutectoid bearing steel AISI 52100 has been carried out during an unconventional thermo-chemical process aiming to improve the wear performance under dry conditions. The effects of NH3 addition rate on microstructure, hardness and wear performance of the carbonitrided specimen were characterized and the results show that two types of nitride (CrN, (Cr,Fe)2N1−x) are formed in the surface layer. The quantity of the nitride and carbide precipitates increase firstly and decrease subsequently with the increasing of NH3 addition rate, whereas the fraction of retained austenite increases monotonically. The wear performance of the carbonitrided specimen is improved during the entire stage of the sliding test with the NH3 addition rate below 0.4 l/min, but it decreases sharply at the initial stage of sliding test and then increases gradually when further raising the NH3 addition rate. The possible reasons underlying have been discussed and are attributed to the fraction of retained austenite formed during carbonitriding process and the transformation from retained austenite into martensite during sliding test, respectively.

KW - Hypereutectoid bearing steel

KW - Carbonitriding

KW - Ammonia addition rate

KW - Retained austenite

KW - Wear resistance

U2 - 10.1016/j.surfcoat.2019.01.019

DO - 10.1016/j.surfcoat.2019.01.019

M3 - Journal article

VL - 361

SP - 112

EP - 118

JO - Surface and Coatings Technology

JF - Surface and Coatings Technology

SN - 0257-8972

ER -