TY - JOUR
T1 - The wear resistance of boride layers measured by the four-ball test
AU - Garcia-Bustos, E.
AU - Figueroa-Guadarrama, M. A.
AU - Rodríguez-Castro, G. A.
AU - Gómez-Vargas, O. A.
AU - Gallardo-Hernández, E. A.
AU - Campos-Silva, I.
N1 - Funding Information:
This work was supported by the research grants 150556 and 183836 of the CONACYT , and 20120594 of the Instituto Politecnico Nacional of Mexico . The authors wish to thank the Nanosciences Center and Micro-Nano Technologies of the Instituto Politecnico Nacional for their cooperation.
PY - 2013/1/25
Y1 - 2013/1/25
N2 - This study estimated the wear resistance of the FeB/Fe2B layers using the four-ball test. First, the boride layers were obtained at the surface of the AISI 52100 steels using the powder-pack boriding method. The treatment was carried out at a temperature of 1223K with 1h of exposure. Boriding the AISI 52100 steels resulted in the formation of FeB/Fe2B layers with a thickness of approximately 40μm. Four-ball tests were performed on the borided and non-borided steel ball samples in both dry and lubricated conditions. The dry sliding four-ball tests were performed under applied loads of 49, 98 and 147N for 150s. In the lubricated test, only loads of 147 and 392N were applied for 3600s with a sliding speed of 1200rpm. In the dry and lubricated conditions, the coefficient of friction (COF) was monitored by a full bridge load cell, in which the temperature was sensed through a thermocouple in real time. The wear scar diameter (WSD) and worn surfaces of borided and non-borided steels in both experimental conditions were characterized to understand the involved wear mechanisms. In the dry condition, the results showed that the presence of boride layers at the surface of the AISI 52100 steels has an important effect on the COF values, indicating the potential features of the solid lubricant. This effect was not visible in the COF values when the borided steels were exposed to the lubricating conditions.
AB - This study estimated the wear resistance of the FeB/Fe2B layers using the four-ball test. First, the boride layers were obtained at the surface of the AISI 52100 steels using the powder-pack boriding method. The treatment was carried out at a temperature of 1223K with 1h of exposure. Boriding the AISI 52100 steels resulted in the formation of FeB/Fe2B layers with a thickness of approximately 40μm. Four-ball tests were performed on the borided and non-borided steel ball samples in both dry and lubricated conditions. The dry sliding four-ball tests were performed under applied loads of 49, 98 and 147N for 150s. In the lubricated test, only loads of 147 and 392N were applied for 3600s with a sliding speed of 1200rpm. In the dry and lubricated conditions, the coefficient of friction (COF) was monitored by a full bridge load cell, in which the temperature was sensed through a thermocouple in real time. The wear scar diameter (WSD) and worn surfaces of borided and non-borided steels in both experimental conditions were characterized to understand the involved wear mechanisms. In the dry condition, the results showed that the presence of boride layers at the surface of the AISI 52100 steels has an important effect on the COF values, indicating the potential features of the solid lubricant. This effect was not visible in the COF values when the borided steels were exposed to the lubricating conditions.
KW - Boride layers
KW - Boriding
KW - Coefficient of friction, wear mechanisms
KW - Four-ball test
KW - Roughness
UR - http://www.scopus.com/inward/record.url?scp=84872688469&partnerID=8YFLogxK
U2 - 10.1016/j.surfcoat.2012.08.090
DO - 10.1016/j.surfcoat.2012.08.090
M3 - Artículo
SN - 0257-8972
VL - 215
SP - 241
EP - 246
JO - Surface and Coatings Technology
JF - Surface and Coatings Technology
ER -