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A Coupled Model Of Microsegregation And Tin Inclusion Precipitation During Solidification Of Gcr15Simn In Esr Process

Published: 2014
Authors: Liang Yang, Shijian Li, Guoguang Cheng, Min Zhao, Guiping Feng

The microsegregation and non-metallic inclusion TiN precipitation during solidification of GCrl5SiMn in ESR process is strongly harmful to steel properties. Many studies have been reported models of solute elements microsegregation during solidification, for example, Scheil model, Brody-Flemings model[1], Clyne-Kurz model[2], Ohnaka model[3], however, all models mentioned above are not taking the influence of inclusion precipitation on solute elements microsegregation into consideration, which will result in the overestimate of microsegregation degree.

Material Resources / Publications

Quantitative Approach Of Selecting A Heat Treater Using Cqi 9 Standardization

Published: 2014
Authors: Sankaran Srinivasan, K. Manikandan, Giridhar Venkatesan

The success of a part produced for its world class quality depends upon the allied processes like heat treatment & plating. Even though the guidelines for doing a good heat treatment are available, the selection is limited as the approach available is qualitative in nature.

Material Resources / Publications

Influence Of Stored Energy In Cold Rolled Sheet On The Formation Of Austenite During The Subsequent Intercritical Annealing Of V-Bearing Dual-Phase Steels

Published: 2014
Authors: Yu Gong, X. Liang, M. Hua, Juha Uusitalo and A. J. DeArdo

Recent research has shown an important relationship between the stored energy of the hot band, the increase in stored energy in cold rolling and the formation of austenite during intercritical annealing of V-bearing DP 980 steels. The stored energy is measured by combining SEM/FEG/EBSD with newly developed software that sums the subgrain boundary energy in the steel.

Material Resources / Publications

Study Of Friction During Cold Rolling Of Steel In A Four-High Reversible Mill

Published: 2014
Authors: Alan Mario Gonzalez Villarreal, Luis Adolfo Leduc Lezama1, Rafael Mercado Solis, Guillermo Barrera, Fernando Gonzalez

Friction during cold rolling is a complex phenomenon that is not yet fully understood. In industrial rolling processes, the correct prediction of the friction coefficient allows process optimization. Cold rolling friction has traditionally been studied using laboratory mills under controlled experimental conditions.

Material Resources / Publications

Microstructural And Computer Modeling Study Of The Annealing Behavior Of Vanadium Bearing Hsla Steel After Cold Rolling

Published: 2014
Authors: R. Ordonez, G. Wang, Z. Liu, J. Smiley, R. Moses, and C.I. Garcia

The annealing behavior of commercial Vanadium bearing HSLA steel was studied using different techniques such as OM, SEM, and electron backscattered diffraction (EBSD). The Kernel Average Misorientation and Sub-grain method were used to measure the local grain misorientation, the changes in stored energy and to calculate the percent recrystallization after annealing.

Material Resources / Publications

Recent Developments In Continuous Annealing Process Of Advanced High Strength Steels At Thyssenkrupp Steel Europe

Published: 2014
Authors: Marc Blumenau, Annette Baumer

Modem and future advanced high strength steels (AHSS) with multi-phase microstructure are characterized by an increasing amount of alloying elements, an increasing strength and an increasing demand for an appropriate continuous annealing process after cold-milling. Therefore, processing of AHSS in a continuous annealing line (CAL) represents a promising alternative to continuous hot-dip galvanizing.

Material Resources / Publications

Different Routes For The Development Of Ferritepearlite Microstructures Suitable For Spheroidization During Soft Annealing Treatments

Published: 2014
Authors: J. Arruabarrena, P. Uranga, B. Lopez and J.M. Rodriguez-Ibabe

Cementite spheroidization during conventional soft annealing treatment, usually applied to medium carbon steels prior to cold forming, has been studied. Initial ferrite-pearlite microstructural features and conditioning of such microstructures by deformation assisted techniques allow a wide range of spheroidized microstructures and mechanical properties after annealing.

Material Resources / Publications

Effect Of Water Temperature On The Cooling Rate, Mechanical Properties Of A C-Mn Containing Steel Sheet

Published: 2014
Authors: Xiaodong Zhu, Wei Li, Peng Xue

Nowadays, water quenching is widely used in continuous annealing lines to produce martensitic steel sheet or dual phase steel sheet. Water quenching is characterized by very fast cooling rate at around room temperature. In this paper, the effect of water temperature on the cooling rate, microstructure and mechanical properties of a cold-rolled C-Mn containing steel is studied.

Material Resources / Publications

Austenite Evolution During Limited Roughing Of Htpsteel

Published: 2014
Authors: Kevin Banks and Rorisang Maubane

The evolution of austenite during and immediately after roughing has been investigated with the aim of achieving a fine, uniform grain size in thick high temperature processing (HTP) steel skelp. Four-pass rolling simulations were performed after which austenite softening and the extent of grain refinement were determined from flow curve analysis and metallography respectively.

Material Resources / Publications

Dynamic Transformation Of Austenite To Ferrite During The Torsion Simulation Of Strip Rolling

Published: 2014
Authors: Clodualdo Aranas Jr., John J. Jonas

Torsion simulations of strip rolling were carried out on a 0.06%C-0.3%Mn-0.01%Si steel over the temperature range 930°C to 1000°C. Pass strains of 0.4 were applied at a strain rate of 1s'1. Interpass times of 0.5s, 1s, 1.5s and 3s were employed to determine the mean flow stresses (MFSs) applicable to strip rolling.

Material Resources / Publications

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