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Chongqing, China

Tang Y.,CISDI Group Co.
Procedia Earth and Planetary Science | Year: 2011

Inclusion control in LF-VD process for ultra-low oxygen alloyed structural steel is investigated. It is found that after Al-deoxidation during tapping process, with slag of high basicity, high Al 2O 3 content and low oxidizing property, Al 2O 3 inclusions, which are the product of Al-deoxidation could transform to MgO-Al 2O 3 spinel, and later on to CaOMgO-Al 2O 3 inclusions of lower melting point, which are inclined to be eliminated by floatation, thus total oxygen content would be lowered. On the other hand, residual inclusions in steel are mostly ultra-fine in size, and could be deformed slightly in hot-working process of steel, enhancing fatigue life of steel. © 2011 Published by Elsevier Ltd. Source


Yu T.,CISDI Group Co.
Advanced Materials Research | Year: 2013

In order to improve fatigue life of wheel steel, secondary-refining process is done with Al-deoxidation and slag of high basicity, high Al2O3 content and low oxidizing property. [Mg], [Ca] content in molten steel would be influenced by slag composition. It is found that high basicity, high Al2O3 content and low oxidizing property is positive factor for proper [Mg], [Ca] content in molten steel which is the key of inclusion transformation from Al2O3 to CaO-MgO-Al2O3 complex inclusion, contributing to the enhancement of fatigue performance for wheel steel. © (2013) Trans Tech Publications, Switzerland. Source


Tang Y.,CISDI Group Co.
Manufacturing and Engineering Technology - Proceedings of the 2014 International Conference on Manufacturing and Engineering Technology, ICMET 2014 | Year: 2015

In order to improve fatigue life of high-speed wheel steel, LF-VD secondary-refining process is carried on with Al-deoxidation and slag of high basicity, high Al2O3 content and low oxidizing property. It is found that inclusion transformation process would be influenced obviously by slag compostion, which is the key for the enhancement of fatigue performance for wheel steel. © 2015 Taylor and Francis Group, London. Source


Xiao X.,CISDI Group Co. | Zhang Q.,Hong Kong University of Science and Technology | Shi Y.,Tsinghua University | Gao Y.,Tsinghua University
IEEE Transactions on Parallel and Distributed Systems | Year: 2012

In this paper, we propose a service differentiation incentive for P2P streaming system, according to peers' instant contributions. Also, a repeated game model is designed to analyze how much the peers should contribute in each round under this incentive. Simulations show that satisfying streaming quality is achieved in the Nash Equilibrium state. © 2006 IEEE. Source


The fluid flow of liquid metal in ladles of CAS-OB refining process is a complicated turbulent transmission process. It behaves much more complicated than in traditional ladle because of immersion snorkel. This paper describes properties of liquid metal based on full buoyancy model. The author analyzes the characteristics of flow field in single and double-nozzles bottom blowing condition through numerical simulation method. Double-nozzles bottom blowing could improve blending effect in the region where is weak mixing. This paper also draws an empirical formula which tells how gas blowing and immersion depth influence mixing time in CAS-OB ladle through dimensionless analysis: © (2013) Trans Tech Publications, Switzerland. Source

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