scholarly journals Static recrystallization kinetics of ferrite in cold-deformed medium carbon steel

2020 ◽  
Vol 6 (12) ◽  
pp. 1265g9 ◽  
Author(s):  
Mohammad Tavakoli ◽  
Hamed Mirzadeh ◽  
Mehran Zamani
Keyword(s):  
Carbon Steel ◽  
Static Recrystallization ◽  
Medium Carbon Steel ◽  
Medium Carbon ◽  
Recrystallization Kinetics ◽  
Kinetics Of

Laser Hardening of Steel

1983 ◽  
Vol 21 ◽  
Author(s):  
B. Bengtsson ◽  
W-B. Li ◽  
K.E. Easterling
Keyword(s):  
Phase Transformation ◽  
Carbon Steel ◽  
Medium Carbon Steel ◽  
Laser Hardening ◽  
Thermal Cycles ◽  
Medium Carbon ◽  
Austenite Transformation ◽  
Theoretical Predictions ◽  
Kinetics Of ◽  
Good Agreement

ABSTRACTChanges in microstructure due to phase transformation are measured for a number of laser-hardening treatments in both an Nb-microalloyed and a medium carbon steel. These measurements are correlated with theoretical predictions of laser thermal cycles and good agreement is obtained. The kinetics of the ferritic/pearlitic→austenite transformation are also discussed.

Analysis of the Kinetics of Devitrification and Crystallization of a Melilite Mold Powder Slag for Medium Carbon Steel Billet Casting

2020 ◽  
Vol 51 (2) ◽  
pp. 732-755
Author(s):  
Claudia Barraza de la P. ◽  
A. Humberto Castillejos E. ◽  
Sergio Rodríguez A. ◽  
Félix Ortega C.
Keyword(s):  
Carbon Steel ◽  
Medium Carbon Steel ◽  
Mold Powder ◽  
Medium Carbon ◽  
Steel Billet ◽  
Kinetics Of

Influence of niobium microalloying on the kinetics of static and dynamic recrystallization during hot rolling of medium-carbon high-strength steels

2020 ◽  
pp. 5-15
Author(s):  
T. V. Knyazyuk ◽  
N. S. Novoskoltsev ◽  
A. A. Zisman ◽  
E. I. Khlusova
Keyword(s):  
Dynamic Recrystallization ◽  
Hot Rolling ◽  
Static Recrystallization ◽  
High Strength Steels ◽  
High Strength ◽  
Medium Carbon Steel ◽  
Medium Carbon ◽  
Niobium Microalloying ◽  
Temperature Strain ◽  
Kinetics Of

The temperature-strain conditions of dynamic and static recrystallization during hot deformation were determined at a rate of 1 sec–1 for medium-carbon steel microalloyed with titanium, boron, and vanadium containing different amounts of niobium. It was found that under hot rolling conditions niobium prevents the completion of dynamic recrystallization, and at temperatures below 970°C it drastically slows down static recrystallization in the pauses between successive reductions.

INFLUENCE THE QUENCHING AND TEMPERING ON THE MICROSTRUCTURE, MECHANICAL PROPERTIES AND SURFACE ROUGHNESS, OF MEDIUM CARBON STEEL

2018 ◽  
Vol 18 (1) ◽  
pp. 125-135
Author(s):  
Sattar H A Alfatlawi
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Surface Roughness ◽  
Carbon Steel ◽  
Cold Water ◽  
Medium Carbon Steel ◽  
Medium Carbon ◽  
Heating And Cooling ◽  
Treatment Processes ◽  
Quenching And Tempering

One of ways to improve properties of materials without changing the product shape toobtain the desired engineering applications is heating and cooling under effect of controlledsequence of heat treatment. The main aim of this study was to investigate the effect ofheating and cooling on the surface roughness, microstructure and some selected propertiessuch as the hardness and impact strength of Medium Carbon Steel which treated at differenttypes of heat treatment processes. Heat treatment achieved in this work was respectively,heating, quenching and tempering. The specimens were heated to 850°C and left for 45minutes inside the furnace as a holding time at that temperature, then quenching process wasperformed in four types of quenching media (still air, cold water (2°C), oil and polymersolution), respectively. Thereafter, the samples were tempered at 200°C, 400°C, and 600°Cwith one hour as a soaking time for each temperature, then were all cooled by still air. Whenthe heat treatment process was completed, the surface roughness, hardness, impact strengthand microstructure tests were performed. The results showed a change and clearimprovement of surface roughness, mechanical properties and microstructure afterquenching was achieved, as well as the change that took place due to the increasingtoughness and ductility by reducing of brittleness of samples.

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