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LI Xiao-quan, YANG Xu-guang, FANG Chen-fu. Thermodynamical analysis of active SiO2 in interfacial chemical reaction between slag and liquid metal based on thermal-dynamic coupling[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2005, (10): 43-46.
Citation: LI Xiao-quan, YANG Xu-guang, FANG Chen-fu. Thermodynamical analysis of active SiO2 in interfacial chemical reaction between slag and liquid metal based on thermal-dynamic coupling[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2005, (10): 43-46.
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Thermodynamical analysis of active SiO2 in interfacial chemical reaction between slag and liquid metal based on thermal-dynamic coupling

  • Province Key Lab of Advanced Welding Technology, Jiangsu University of Science and Technology, Zhengjiang 212003, China

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  • Received Date: July 28, 2005
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  • To counter its characteristics of far from equilibrium,the metallurgical reaction occurred at slag/metal interface for SiO2 in molten slag with deposited metal had been modeled in view of coupling non-equilibrium static thermodynamics with interacting principle of liquid-liquid phases. According to the established model,nonlinear numerical simulation was carried out with matlab software.The result of quantitative calculating shows that there is obvious distinction in direction and limitation for different welding zones.The distance of drifting off equilibrium state for straight oxidizing direction in droplet stage is far more than that of inverse reducing direction in welding pool zone.Meanwhile,factors such as temperature,SiO2 content exert certain influence on direction and limitation of chemical reaction,which produces great impact on oxygen gaining for weld metal.
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