材料期刊网

THERMODYNAMIC PROPERTIES Cu-Ce-S AND Cu-Y-S LIQUID SOLUTIONS

LI Guodong , D U Ting , Central Iron and Steel Research Institute , Ministry of Metallurgical Industry , Beijing , China LI Guodong , Department No.16 , Central Iron and Steel Research Institute , Ministry of Metallurgical Industry , Beijing , 100081 , China

金属学报(英文版)

The thermodynamic properties of Cu-Ce-S and Cu-Y-S liquid solutions were studied by the chemical equilibrium technique at 1200℃. The equilibrium constants and the standard free energies of formation of CeS and YS were determined for the reactions: CeS=[Ce]+[S] and YS = [Y]+[S] . For the solution of Ce_(1) and Y_(l) in pure Cu according to the reactions: Ce_(1)= [Ce] and Y_(1)= [Y] , the standard free energies of solutions were obtained. The first order and second order interaction coefficients between solute elements as well as the activity coefficients γ_(Ce)~0 and γ_Y~0 in liquid Cu were also determined.

关键词: Cu-Ce-S system , null , null

Luoyang Institute of Refractories Research Ministry of Metallurgical Industry

ZHONG Xiangchong Luoyang Institute of Refractories Research , Luoyang , China.

材料科学技术（英文）

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PHASE DIAGRAM OF Nd-Fe-B TERNARY SYSTEM——I.Isothermal Section at Room Temperature

ZHANG Ning , Centrall Iron and Steel Research Institute , Ministry of Metallurgical Industry , Beijing. ChinaLUO Yang , San Huan New Material Research and Development Center , Academia Sinica , Beijing , China

金属学报(英文版)

The microstructures of both as-cast and homogenized Nd-Fe-B ternary alloys have been studied. The stable phase regions existing in Nd-Fe-B ternary system at room temperature have been established by the microzone composition analysis and the phase identification. Based on the obtained results, an isothermal section of Nd-Fe-B ternary system at room temperature was drawn.

关键词: phase diagram , null , null

PHASE DIAGRAM OF Nd-Fe-B TERNARY SYSTEM——Ⅱ.Two Vertical Sections with Constant Nd and B Respectively,Passing Through Nd_2Fe_(14) B Point

ZHANG Ning , Central Iron and Steel Research Institute , Ministry of Metallurgical Industry , Beijing , ChinaLUO Yang , San Huan New Material Research and Development Center , Academia Sinica , Beijing , China

金属学报(英文版)

According to the experimental data of phase transition taken from DTA, metallography, SEM and microzone composition, two vertical sections of the ternary phase diagram (B=5.88 at.-%, Nd≤45.41 at.-% andNd_2Fe_(14)BNd_(1.1)Fe_4B_4 , B≤44.56 at.-%) have been drawn in detail. It is verified that the crystallization of both Nd_2Fe_(14)B and Nd_(1.1)Fe_4B_4 phase, during cooling from melt, would take peritectic reaction instead of solid-liquid congruent precipita- tion.

关键词: Nd-Fe-B phase diagram , null

THERMODYNAMIC PROPERTIES OF Fe-V-Ce LIQUID SOLUTION

CHANG Heming , DU Ting , YU Jingsheng , Central Iron and Steel Research Institute , Ministry of Metallurgical Industry , Beijing , China

金属学报(英文版)

Thermodynamic properties of the Fe-V-Ce liquid solutions have been studied in the tempera- ture range of 1550-1650℃. The temperature dependences of the equilibrium constants of re- action Ce_2O_2S = 2[Ce]+2[O]+[S] and the standard free energy of formation of Ce_2O_2S have been obtained. The temperature dependences of the interaction coefficients e_v~(Ce) and e_(Ce)~v have also been determined.

关键词: Fe-V-Ce system , null , null

Thermodynamics of Cu-Y-I (I= Sn, Zn, Pb) Liquid Solutions

Ting DU and Guodong LI(Central Iron and Steel Research Institute , Ministry of Metallurgical Industry , Beijing , 100081 , China)

材料科学技术（英文）

The isoactivity of [Y] of samples was obtained in multiple- hole graphite crucibles by controlling the oxygen potential through the reaction 2 [Y]+3CO = Y2O3+3C. The activity interaction coefficients between Y and Sn. Zn, Pb alloying elements were determined by using coniugate gradient method of solving ill-conditioned equations. The equilibrium constant of the reaction 2 [Y]+3 [O] = Y2O3 and the standard free energy of formation of Y2O3 in liquid Cu were obtained at 1200℃

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THE STEEL INDUSTRY IN ARAB COUNTRIES

S.A. Al-Aghbari and Z. W. Lu Ministry of Oil & Mineral Resources , Republic of Yemen Thermal-Engineering Department , Northeastern University , Shenyang 110006 , China

金属学报(英文版)

A brief introduction to Arab countries, in respect of their locations, populations, areas and mineral resources, was given. The development of steel industry in Am6 countries in last two decades was staled as a whole. And the steel industries in Egypt, Qatar, Saudi Arabia, United Arch Emirates (UAE), Morocco, Libya, Joanal, Tunisia, Syria, Iraq, Algeria and Bahrain were analyzed separately. Some development problems faced by Arab steel industry, such as steel market, natural resources, manpower and finance, were pointed out.

关键词: steel industry , null , null

ELECTROCHEMICAL MEASUREMENTS OF COMPONENT ACTIVITIES IN METALLURGICAL SLAGS

O. Volkova , P.R.Scheller , D.Janke

金属学报(英文版)

The up-to-date status of FeO, CaO, SiO2, P2O05,Ti2O3 and Cr2O3 activity measurements in metallurgical slags using electrochemical sensors is outlined. A description of theoretical concepts and practical sensors is presented including their determining features.

关键词: electrochemical measurement , null , null

Thermo electrochemistry and its application to metallurgical research

Zheng FANG , Quanru ZHANG , Hengzhong ZHANG , Yuan FANG

材料科学技术（英文）

The thermoelectrochemistry (TEC), a novel cross discipline, is presented, including the basic equations for a cell and a half-cell reaction, the treatment of experimental data and its application to electro-generative leaching of mineral and to measuring thermodynamic and kinetic data of an electrode reaction. The TEC technology will play an important part in the research on the metallurgical process under various fields.

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Jet Behavior and Metallurgical Performance of Innovated DoubleParameter Oxygen Lance in BOF

YUAN Zhangfu , YANG Xiao , LU Zhixing , HUANG Jiangning , PAN Yifang , MA Enxiang

钢铁研究学报(英文版)

A doubleparameter oxygen lance used in a 300 t converter was designed to improve the metallurgical performance. A smallscale measurement of the jet behavior was done using a computer controlled scanning system. The experimental data on the velocity distribution at the jet centerline, the contour map of the jet velocity, the deviation of the jet centerline, and the velocity distribution of the axial section were compiled. According to the results of the smallscale measurement, the doubleparameter lance was also employed for a BOF experiment. The metallurgy indexes show that the metallurgical performance was highly promoted by use of the doubleparameter lance.

关键词: oxygen lance;jet behavior;BOF;metallurgical performance