scholarly journals Behavior of MnS inclusions during homogenization process in low-alloyed steel FAS3420H

2021 ◽  
Vol 40 (1) ◽  
pp. 66-76
Author(s):  
Shuai Liu ◽  
Zhanbing Yang ◽  
Fuming Wang
Keyword(s):  
Statistical Analysis ◽  
Alloyed Steel ◽  
Process Performance ◽  
Rolled Steel ◽  
Homogenization Treatment ◽  
Soaking Time ◽  
Homogenization Process ◽  
Low Alloyed Steel ◽  
Shape And Size

Abstract Sulfur is added to low-alloyed steel FAS3420H to improve the free-cutting property of the steel. Elongated MnS inclusions usually deteriorate the mechanical and process performance of steels, so the control of shape and size of MnS is essential. The statistical analysis of MnS inclusions in as-cast and rolled steels at different positions shows that the distribution and aspect ratio of MnS in rolled steel are closely related to the quantity and size of MnS in as-cast one. The in situ observation and experimental results reveal that homogenization treatment effectively reduced MnS inclusions size and transformed their shape to globule or ellipsoid. Significant change of quantity and size of MnS inclusions was identified only when the soaking time exceeds 5 h at 1,250℃. Additionally, a kinetic model is presented to quantitatively characterize the behavior of MnS inclusions during homogenization process.

In situ study of selective manganese oxidation on low-alloyed steel using high-temperature cyclic voltammetry

2021 ◽  
Vol 371 ◽  
pp. 115770
Author(s):  
Sunil Kavunga ◽  
Günter Fafilek ◽  
Gerald Luckeneder ◽  
Ernst Dietmar Schachinger ◽  
Karl-Heinz Stellnberger ◽  
...  
Keyword(s):  
Cyclic Voltammetry ◽  
High Temperature ◽  
Alloyed Steel ◽  
Manganese Oxidation ◽  
In Situ Study ◽  
Low Alloyed Steel

Effect of Formic Acid on Corrosion Behavior of STBA24 Low-Alloyed Steel and Its Weldment in Simulated Boiler Water Containing Chloride Ions

2020 ◽  
Vol 61 (9) ◽  
pp. 1775-1781
Author(s):  
Li-Bin Niu ◽  
Shoichi Kosaka ◽  
Masaki Yoshida ◽  
Yusuke Suetake ◽  
Kazuo Marugame
Keyword(s):  
Formic Acid ◽  
Corrosion Behavior ◽  
Chloride Ions ◽  
Alloyed Steel ◽  
Boiler Water ◽  
Low Alloyed Steel

scholarly journals Statistical Analysis of the Main Ionospheric Trough Using Swarm in Situ Measurements

2020 ◽  
Vol 125 (3) ◽  
Author(s):  
Ercha Aa ◽  
Shasha Zou ◽  
Philip J. Erickson ◽  
Shun‐Rong Zhang ◽  
Siqing Liu
Keyword(s):  
Statistical Analysis ◽  
In Situ Measurements ◽  
Main Ionospheric Trough

The measurement of groundwater temperature in shallow piezometers and standpipes

2005 ◽  
Vol 42 (5) ◽  
pp. 1377-1390 ◽  
Author(s):  
Matthew D Alexander ◽  
Kerry TB MacQuarrie
Keyword(s):  
Finite Element ◽  
Statistical Analysis ◽  
Transport Model ◽  
Shallow Groundwater ◽  
Subsurface Temperature ◽  
Groundwater Temperature ◽  
Monitoring Well ◽  
Laboratory Results ◽  
The Impact

Accurate measurements of in situ groundwater temperature are important in many groundwater investigations. Temperature is often measured in the subsurface using an access tube in the form of a piezometer or monitoring well. The impact of standpipe materials on the conduction of heat into the subsurface has not previously been examined. This paper reports on the results of a laboratory experiment and a field experiment designed to determine if different standpipe materials or monitoring instrument configurations preferentially conduct heat into the shallow sub surface. Simulations with a numerical model were also conducted for comparison to the laboratory results. Statistical analysis of the laboratory results demonstrates that common standpipe materials, such as steel and polyvinylchloride (PVC), do not affect temperature in the subsurface. Simulations with a finite element flow and heat transport model also confirm that the presence of access tube materials does not affect shallow groundwater temperature measurements. Field results show that different instrument configurations, such as piezometers and water and air filled and sealed well points, do not affect subsurface temperature measurements.Key words: groundwater temperature, temperature measurement, conduction, piezometers, piezometer standpipes, thermal modelling.

Fast Salt Bath Heat Treatment for a Bainitic/Martensitic Low-Carbon Low-Alloyed Steel

2015 ◽  
Vol 46 (11) ◽  
pp. 5343-5349
Author(s):  
Julia Urbanec ◽  
Ari Saastamoinen ◽  
Seppo Kivivuori ◽  
Seppo Louhenkilpi
Keyword(s):  
Heat Treatment ◽  
Salt Bath ◽  
Alloyed Steel ◽  
Low Carbon ◽  
Low Alloyed Steel
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