Dynamic recrystallisation kinetics of GCr15 bearing steel

2008 ◽  
Vol 12 (4) ◽  
pp. 213-216 ◽  
Author(s):  
C. X. Yue ◽  
L. W. Zhang ◽  
S. L. Liao ◽  
J. B. Pei ◽  
H. J. Gao ◽  
...  
Keyword(s):  
Bearing Steel ◽  
Gcr15 Bearing Steel ◽  
Dynamic Recrystallisation ◽  
Kinetics Of

scholarly journals Study on Precipitation and Growth of TiN in GCr15 Bearing Steel during Solidification

Materials ◽  
2019 ◽  
Vol 12 (9) ◽  
pp. 1463 ◽  
Author(s):  
Bin Li ◽  
Xiao Shi ◽  
Hanjie Guo ◽  
Jing Guo
Keyword(s):  
Growth Kinetics ◽  
Stability Diagram ◽  
Bearing Steel ◽  
Kinetic Calculation ◽  
Gcr15 Bearing Steel ◽  
Before And After ◽  
Solving Equations ◽  
The Stability ◽  
Kinetics Of ◽  
Ti Content

In this paper, the precipitation thermodynamics and growth kinetics of TiN inclusions in GCr15 bearing steel during solidification were calculated in more detail. A more reasonable formula for calculating the segregation of the solute elements was adopted and the stability diagram of TiN precipitation considering solidification segregation was given. By solving equations, the change of the solute element content before and after TiN inclusion precipitation was calculated, and the results were substituted into the kinetic formula of the inclusion growth, which made the kinetic calculation more accurate. Results showed that the most effective way to reduce the precipitation of TiN is to increase the cooling rate and decrease the contents of Ti and N in steel. The effect of Ti content on the size of TiN inclusions is greater than that of N content.

TiN/ZrO2 multilayers synthesized on GCr15 bearing steel using plasma immersion ion implantation and deposition

2007 ◽  
Vol 201 (15) ◽  
pp. 6615-6618 ◽  
Author(s):  
Tao Sun ◽  
Langping Wang ◽  
Yonghao Yu ◽  
Yuhang Wang ◽  
Xiaofeng Wang ◽  
...  
Keyword(s):  
Ion Implantation ◽  
Bearing Steel ◽  
Gcr15 Bearing Steel ◽  
Plasma Immersion Ion Implantation

scholarly journals Complex Precipitates of TiN-MCx in GCr15 Bearing Steel

2019 ◽  
Author(s):  
Qianren Tian ◽  
Guocheng Wang ◽  
Xinghu Yuan ◽  
Qi Wang ◽  
Seetharaman Sridhar
Keyword(s):  
Volume Fraction ◽  
Early Stage ◽  
Nucleation Site ◽  
Bearing Steel ◽  
Precipitation Behavior ◽  
Heterogeneous Nucleation Site ◽  
Bearing Steels ◽  
Advancing Front ◽  
Gcr15 Bearing Steel ◽  
Second Phases

Nitride and carbide are the second phases which play an important role in the performance of bearing steel, and their precipitation behavior is complicated. In this study, TiN-MCx precipitations in GCr15 bearing steels were obtained by non-aqueous electrolysis, and their precipitation mechanisms were studied. TiN is the effective heterogeneous nucleation site for Fe7C3 and Fe3C, therefore, MCx can precipitate on the surface of TiN easily, its chemistry component consists of M3C and M7C3 (M = Fe, Cr, Mn) and Cr3C2. TiN-MCx with high TiN volume fraction, TiN forms in early stage of solidification, and MCx precipitates on TiN surface after TiN engulfed by the solidification advancing front. TiN-MCx with low TiN volume fraction, TiN and MCx form in late stage of solidification, TiN can not grow sufficiently and is covered by a large number of precipitated MCx particles.

Friction and Wear Performances of Magnesium Alloy against Steel under Lubrication of Rapeseed Oil with N-Containing Additive

2012 ◽  
Vol 562-564 ◽  
pp. 350-354
Author(s):  
Jian Hua Fang ◽  
Jiu Wang ◽  
Jiang Wu ◽  
Bo Shui Chen ◽  
Ling Dong
Keyword(s):  
Magnesium Alloy ◽  
Rapeseed Oil ◽  
Friction And Wear ◽  
Chemical Species ◽  
Bearing Steel ◽  
X Ray ◽  
Lubrication Film ◽  
Gcr15 Bearing Steel ◽  
Strong Adsorption ◽  
Wear And Friction

A N-containing additive, amide type modified rapeseed oil (named as NRO), was prepared by chemical modification of rapeseed oil and characterized by infrared spectrum The friction and wear performances of AZ91D magnesium alloy against GCr15 bearing steel under the lubrication of rapeseed oil formulated with NRO were evaluated on a SRV tribotester. The topographies and the chemical species of the worn surfaces of magnesium alloy were analyzed by a scanning electron microscope (SEM) and an X-ray photoelectron spectroscope (XPS), respectively. The results indicated that the friction and wear of the magnesium alloy—steel tribomates could be effectively reduced by formulating NRO into rapeseed oil lubricant. The friction coefficients and the wear volumes of magnesium alloy decreased with increasing contents of NRO. The surface lubricated with NRO-doped rapeseed oil was characterized by less wear as compared with that lubricated with neat rapeseed oil. The enhanced anti-wear and friction-reducing abilities of rapeseed oil by NRO in the lubrication of magnesium alloy against steel were ascribed to the formation of a composite boundary lubrication film due to the strong adsorption of NRO and rapeseed oil onto the lubricated surfaces and their tribochemical reactions with magnesium alloy.

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