A study of the cooling kinetics of bearing steel in UZSP-1 polymer quenching medium

1997 ◽  
Vol 39 (7) ◽  
pp. 288-291
Author(s):  
V. V. Goryushin ◽  
A. G. Ksenofontov ◽  
S. Yu. Shevchenko
Keyword(s):  
Bearing Steel ◽  
Quenching Medium ◽  
Polymer Quenching ◽  
Kinetics Of

Investigation of the kinetics of surface decarburization in ball bearing steel when heat treated

1960 ◽  
Vol 2 (2) ◽  
pp. 105-108 ◽  
Author(s):  
N. P. Zhetvin ◽  
L. N. Podvoiskii ◽  
L. I. Krylova
Keyword(s):  
Ball Bearing ◽  
Bearing Steel ◽  
Heat Treated ◽  
Kinetics Of ◽  
Surface Decarburization ◽  
Ball Bearing Steel

Zak-PG polymer quenching medium

1999 ◽  
Vol 41 (2) ◽  
pp. 52-53
Author(s):  
A. A. Belanov ◽  
A. P. Kut'ev ◽  
N. S. Mirzabekova ◽  
A. G. Ksenofontov ◽  
S. Yu. Shevchenko
Keyword(s):  
Quenching Medium ◽  
Polymer Quenching

Comparison of Two Methods of Calculation of Activation Energy for some Chosen Industrial Steels after its Oxidation at High-Temperatures in Air

2005 ◽  
Vol 237-240 ◽  
pp. 979-984
Author(s):  
Krzysztof Adamaszek ◽  
Zbigniew Jurasz
Keyword(s):  
Activation Energy ◽  
Parabolic Rate Constant ◽  
Bearing Steel ◽  
Chamber Furnace ◽  
Parabolic Law ◽  
Methods Of Calculation ◽  
Reciprocal Temperature ◽  
Kinetics Of ◽  
Energy Activation ◽  
Good Agreement

In this work it will be presented the results of calculation of energy activation Q of selected industrial steels (e.g. grade 55 - carbon steel, LH15 – bearing steel, H10S2M, 4H14N14W2M and 50H21G9N4 valve steels) according to Polish Norm by two methods. In the first method the calculations of Q are based on the dependence of value of parabolic growth rate constants kp in function of reciprocal temperature. The second method is based on the calculated parameters, which allow to determine the value of Q for examined steels by using value of Q for pure iron, taken from literature data, and the particular values of mass concentrations of elements in oxidised steels. The growth kinetics of layers were almost according to parabolic law. The values of parabolic rate constant kp were calculated on the basis of measurements of thickness of oxide layers. To the experiment the cylindrical specimens were used. The isothermal process of oxidation was conducted in chamber furnace at 1100, 1060, 1020, 980 and 940°C in the air. Time of oxidation various from 3 till 1303.5 hrs. The comparison of obtained results of activation energy Q for mentioned methods of each individual examined steels gives a good agreement.

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

Calculation and Analysis of Diffusion Kinetics of Alloying Elements in Bearing Steel

2013 ◽  
Vol 815 ◽  
pp. 216-220
Author(s):  
Hui Li ◽  
Zhen Li Mi ◽  
Xiao Lei Zhang ◽  
Di Tang ◽  
Yi De Wang
Keyword(s):  
Significant Influence ◽  
Phase Field ◽  
Diffusion Mechanism ◽  
Bearing Steel ◽  
Annealing Process ◽  
Alloying Elements ◽  
Diffusion Kinetics ◽  
Uniform Temperature ◽  
Kinetics Of ◽  
Better Than

In order to detect the diffusion law of alloying elements in 0.95c-1.45cr-0.35mn-0.25si bearing steel during annealing process,the database of tcfe7 and mobfe of dictra software were used to calculate the diffusion kinetics. The results show that c atoms diffuse rapidly in single fcc phase field and at last uniform,temperature and holding time have no significant influence on them;cr,si,and mn has the same diffusion mechanism,the initial solidifying field has lower solute than the subsequent,and has slight change after solidification. The improvement of segregation factor (cr) at 1300°C for 5h is better than at 1050°C, 1200°C for 10h.

Kinetics of austenite transformation and internal stresses in bainitic hardening of bearing steel

1986 ◽  
Vol 28 (4) ◽  
pp. 255-257 ◽  
Author(s):  
A. N. Kulakov ◽  
A. S. Kagan ◽  
A. A. Kapyrin
Keyword(s):  
Bearing Steel ◽  
Internal Stresses ◽  
Austenite Transformation ◽  
Kinetics Of ◽  
Bainitic Hardening

Kinetics of austenite grain growth in medium-carbon niobium-bearing steel

2011 ◽  
Vol 12 (3) ◽  
pp. 171-176 ◽  
Author(s):  
Ying-li Zhao ◽  
Jie Shi ◽  
Wen-quan Cao ◽  
Mao-qiu Wang ◽  
Gang Xie
Keyword(s):  
Grain Growth ◽  
Bearing Steel ◽  
Medium Carbon ◽  
Austenite Grain ◽  
Austenite Grain Growth ◽  
Kinetics Of

scholarly journals The Application of Neural Networks for Studying Phase Transformation by the Method of Acoustic Emission in Bearing Steel/ Zastosowanie Sieci Neuronowych Do Badania Przemian Fazowych W Stali Łożyskowej Metodą Emisji Akustycznej

2014 ◽  
Vol 59 (4) ◽  
pp. 1705-1712 ◽  
Author(s):  
T.Z. Wozniak ◽  
Z. Ranachowski ◽  
P. Ranachowski ◽  
W. Ozgowicz ◽  
A. Trafarski
Keyword(s):  
Neural Networks ◽  
Acoustic Emission ◽  
Spectral Characteristics ◽  
Bearing Steel ◽  
Bainitic Transformation ◽  
Complex Phase ◽  
Temperature Heat ◽  
Bainitic Transformations ◽  
Kinetics Of ◽  
Temperature Heat Treatment

Abstract The research was carried out on steel 100CrMnSi6-4 under isothermal austempering resulting in forming the duplex structure: martensitic and bainitic. The kinetics of transformation was controlled by the acoustic emission method. Complex phase transformations caused by segregation and carbide banding occur at the low-temperature heat treatment of bearing steel. At the temperature close to MS, a certain temperature range occurs where an effect of the first product of prior athermal martensite on the bainitic transformation can be observed. In the registered signal about 15 million various events were registered. There were considered three types of acoustic emission events (of high, medium and low energy), with relatively wide sections and with different spectral characteristics. It was found that the method of acoustic emission complemented by the application of neural networks is a sensitive tool to identify the kinetics of bainitic transformation and to show the interaction between martensitic and bainitic transformations.

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.

An aqueous polymer quenching medium for instantaneous thermal shock cooling rate study of ceramic materials

2017 ◽  
Vol 724 ◽  
pp. 234-239 ◽  
Author(s):  
Limin Chen ◽  
Fei Zhu ◽  
Zhengjun Zhang ◽  
Ping Hu ◽  
Anzhe Wang ◽  
...  
Keyword(s):  
Thermal Shock ◽  
Cooling Rate ◽  
Ceramic Materials ◽  
Quenching Medium ◽  
Aqueous Polymer ◽  
Rate Study ◽  
Polymer Quenching
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