New orientation relationship with low interfacial energy in MC/ferrite system observed in Nb-Ti bearing steel during isothermal quenching process

2019 ◽  
Vol 163 ◽  
pp. 101-106 ◽  
Author(s):  
X.-L. Li ◽  
X.-T. Deng ◽  
C.-S. Lei ◽  
Z.-D. Wang
Keyword(s):  
Orientation Relationship ◽  
Interfacial Energy ◽  
Bearing Steel ◽  
Isothermal Quenching ◽  
Quenching Process ◽  
Ferrite System

scholarly journals Carbide Precipitation in Ferrite in Nb–V-Bearing Low-Carbon Steel During Isothermal Quenching Process

2017 ◽  
Vol 30 (11) ◽  
pp. 1067-1079 ◽  
Author(s):  
Xiao-Lin Li ◽  
Cheng-Shuai Lei ◽  
Xiang-Tao Deng ◽  
Yan-Mei Li ◽  
Yong Tian ◽  
...  
Keyword(s):  
Carbon Steel ◽  
Low Carbon Steel ◽  
Carbide Precipitation ◽  
Isothermal Quenching ◽  
Low Carbon ◽  
Quenching Process

Effect of Austenitizing Processes on Isothermal Quenching Microstructure in Bearing Steel

2014 ◽  
Vol 887-888 ◽  
pp. 276-280
Author(s):  
Lei Tian ◽  
Sheng Li Li ◽  
Ji Zhi Liu ◽  
Xiang Hai Zhang
Keyword(s):  
Residual Austenite ◽  
Fracture Morphology ◽  
Bearing Steel ◽  
Isothermal Quenching ◽  
Content Increase ◽  
Dispersion Strengthening ◽  
Austenitizing Temperature ◽  
Microstructure Observation ◽  
Fine Grain ◽  
Lower Temperature

Austempering was applied to bearing steel to improve the performance. The effect of austenitizing temperature and time on isothermal quenching microstructure in bearing steel was investigated via microstructure observation and fracture analysis. The results show that with the increase of austenitizing temperature, the size of bainite plate and residual austenite content increase. Austenitizing at lower temperature, the samples has a fracture composite fracture morphology of polygon cleavage unit and even small dimple.The fracture morphology of sample austenitized at 1050 °C is quasi-cleavage fracture with bar cleavage unit which is corresponding to the coarse acicular microstructure. the size of bainite plate increase with increasing the austenitizing time. As the result of comprehensive effect of fine grain strengthening and dispersion strengthening, that the microhardness firstly increases, and then obviously decreases with the increase of austenitizing time.

scholarly journals Causes of Distortion during High Pressure Gas Quenching Process of Steel Parts

2019 ◽  
Author(s):  
Justin Sims ◽  
Zhichao Li ◽  
B. Lynn Ferguson
Keyword(s):  
High Pressure ◽  
Cooling Rate ◽  
Dimensional Change ◽  
Bearing Steel ◽  
Complex Behavior ◽  
Load Bearing ◽  
Quenching Process ◽  
Nonlinear Relation ◽  
Gas Quenching ◽  
Quench Hardening

Abstract Quench hardening is a necessary process for improving the mechanical and fatigue performance of load bearing steel components, but liquid quenching can lead to large distortions. High pressure gas quenching is becoming a more popular choice, with the assumption that a slower cooling rate will lead to less distortion. While true for certain geometries, nonlinearities in distortion response can make understanding the dimensional change of a component difficult due to the inherently complex behavior during quenching. Through the use of modeling, and a specially designed coupon, the out-of-round distortion of an eccentric bore is examined for common high-pressure gas quenching conditions. The causes of distortion are examined and explained using the model, with insights into why the cooling rate has a nonlinear relation with distortion.

scholarly journals Dimensional Changes and Microstructural Evolution in a B-bearing Steel in the Simulated Forming and Quenching Process.

2001 ◽  
Vol 41 (4) ◽  
pp. 361-367 ◽  
Author(s):  
Mahesh C. Somani ◽  
L. Pentti Karjalainen ◽  
Magnus Eriksson ◽  
Mats Oldenburg
Keyword(s):  
Microstructural Evolution ◽  
Bearing Steel ◽  
Dimensional Changes ◽  
Quenching Process

Computer Simulations of Epitaxial Interfaces

1988 ◽  
Vol 141 ◽  
Author(s):  
S. A. Dregia ◽  
P. Wynblatt ◽  
C. L. Bauer
Keyword(s):  
Orientation Relationship ◽  
Computer Simulations ◽  
Interfacial Energy ◽  
Boundary Energy ◽  
Enthalpy Of Mixing ◽  
Embedded Atom Method ◽  
Misfit Dislocations ◽  
Maximum Displacement ◽  
Embedded Atom ◽  
Atomic Diameter

AbstractThe embedded-atom method was applied in computer simulations to study epitaxial Cu/Ag interfaces in cube-on-cube orientation relationship. Coherent and semicoherent interfaces were studied with inclinations parallel to (001), (011) and (111). The coherent boundary energy depends strongly on the predicted enthalpy of mixing. The interfacial energy for semicoherent boundaries was highly anisotropic, having its largest value (549 mJ/m2) for the (011) interface and its smallest value (231 mJ/m2) for the (111) interface. The periodic elastic relaxations correspond to networks of misfit dislocations lying in the plane of the interface; the maximum displacement in the (011) interface is about one-third the atomic diameter, but only one-eighth the atomic diameter in the (111) interface.

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