Modeling of external forced flow and boiling film effects on heat transfer of AISI 4140 steel horizontal rod during direct quenching process

2011 ◽  
Author(s):  
Amirhossein Meysami
Keyword(s):  
Heat Transfer ◽  
Forced Flow ◽  
Aisi 4140 Steel ◽  
Direct Quenching ◽  
Aisi 4140 ◽  
Quenching Process

Effect of External Forced Flow and Boiling Film on Heat Transfer of AISI 4140 Steel Horizontal Rod During Direct Quenching

2011 ◽  
Vol 18 (10) ◽  
pp. 34-41
Author(s):  
A. H. Meysarni ◽  
R. Ghasemzadeh ◽  
S. H. Seyedein ◽  
M. R. Aboutalebi
Keyword(s):  
Heat Transfer ◽  
Forced Flow ◽  
Aisi 4140 Steel ◽  
Direct Quenching ◽  
Aisi 4140

Novel water-air circulation quenching process for AISI 4140 steel

2013 ◽  
Vol 19 (6) ◽  
pp. 1373-1376 ◽  
Author(s):  
Liyun Zheng ◽  
Dawei Zheng ◽  
Lixin Zhao ◽  
Lihui Wang ◽  
Kai Zhang
Keyword(s):  
Aisi 4140 Steel ◽  
Aisi 4140 ◽  
Quenching Process ◽  
Air Circulation

Timed quenching process for large-scale AISI 4140 steel shaft

2011 ◽  
Vol 16 (2) ◽  
pp. 224-226 ◽  
Author(s):  
Xun-wei Zuo ◽  
Shu Zhou ◽  
Nai-lu Chen ◽  
Bo Liao
Keyword(s):  
Large Scale ◽  
Aisi 4140 Steel ◽  
Steel Shaft ◽  
Aisi 4140 ◽  
Quenching Process

Weld quality and productivity of AISI 4140 steel welded by unpulsed and pulsed GMAW

2018 ◽  
Vol 60 (2) ◽  
pp. 149-155 ◽  
Author(s):  
Turhan Kursun ◽  
Tanju Teker
Keyword(s):  
Weld Quality ◽  
Aisi 4140 Steel ◽  
Aisi 4140

Effects of Suction and Freestream Velocity on a Hydromagnetic Stagnation-Point Flow and Heat Transport in a Newtonian Fluid Toward a Stretching Sheet

2016 ◽  
Vol 138 (9) ◽  
Author(s):  
P. G. Siddheshwar ◽  
N. Meenakshi
Keyword(s):  
Heat Transfer ◽  
Differential Equations ◽  
Heat Transport ◽  
Newtonian Fluid ◽  
Stretching Sheet ◽  
Forced Flow ◽  
Stream Velocity ◽  
Freestream Velocity ◽  
Exponential Order ◽  
Order Surface

Forced flow of an electrically conducting Newtonian fluid due to an exponentially stretching sheet is studied numerically. Free stream velocity is present and so is suction at the sheet. The governing coupled, nonlinear, partial differential equations of flow and heat transfer are converted into coupled, nonlinear, ordinary differential equations by similarity transformation and are solved numerically using shooting method, and curve fitting on the data is done by differential transform method together with Padé approximation. Prescribed exponential order surface temperature (PEST) and prescribed exponential order surface heat flux are considered for investigation of heat transfer related quantities. The influence of Chandrasekhar number, suction/injection parameter, and freestream parameter on heat transport is presented and discussed. Coefficient of friction and heat transport is also evaluated in the study. The results are of interest in extrusions and such other processes.

scholarly journals Forced flow heat transfer from a round wire in a vertically- mounted pipe to supercritical hydrogen

2015 ◽  
Vol 101 ◽  
pp. 012176
Author(s):  
Y Horie ◽  
M Shiotsu ◽  
Y Shirai ◽  
D Higa ◽  
H Shigeta ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Forced Flow ◽  
Flow Heat ◽  
Round Wire

MODELING AND INVESTIGATION OF THE WEAR RESISTANCE OF SALT BATH NITRIDED AISI 4140 VIA ANN

2013 ◽  
Vol 20 (03n04) ◽  
pp. 1350033 ◽  
Author(s):  
ŞERAFETTIN EKINCI ◽  
AHMET AKDEMIR ◽  
HUMAR KAHRAMANLI
Keyword(s):  
Wear Resistance ◽  
Friction Coefficient ◽  
Surface Characterization ◽  
Wear Behavior ◽  
Surface Hardness ◽  
Salt Bath ◽  
Back Propagation Algorithm ◽  
Aisi 4140 Steel ◽  
Aisi 4140 ◽  
Sliding Distance

Nitriding is usually used to improve the surface properties of steel materials. In this way, the wear resistance of steels is improved. We conducted a series of studies in order to investigate the microstructural, mechanical and tribological properties of salt bath nitrided AISI 4140 steel. The present study has two parts. For the first phase, the tribological behavior of the AISI 4140 steel which was nitrided in sulfinuz salt bath (SBN) was compared to the behavior of the same steel which was untreated. After surface characterization using metallography, microhardness and sliding wear tests were performed on a block-on-cylinder machine in which carbonized AISI 52100 steel discs were used as the counter face. For the examined AISI 4140 steel samples with and without surface treatment, the evolution of both the friction coefficient and of the wear behavior were determined under various loads, at different sliding velocities and a total sliding distance of 1000 m. The test results showed that wear resistance increased with the nitriding process, friction coefficient decreased due to the sulfur in salt bath and friction coefficient depended systematically on surface hardness. For the second part of this study, four artificial neural network (ANN) models were designed to predict the weight loss and friction coefficient of the nitrided and unnitrided AISI 4140 steel. Load, velocity and sliding distance were used as input. Back-propagation algorithm was chosen for training the ANN. Statistical measurements of R2, MAE and RMSE were employed to evaluate the success of the systems. The results showed that all the systems produced successful results.

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