발간논문

Home > KJMM 논문 > 발간논문

Density of NaCl-LaCl₃binary melt has been measured over the temperature range of 1000-1250K by means of the manometric method using a special transparent electric furnace. The results obtained are summerized as follows: The density of the binary melt was expressed as a function of temperature and composition on the basis of the data measured, The density increases with the increase of LaCl₃content. The molar volume, the expansion coefficient and the partial molar volumes of the components NaCl, LaCl₃were calculated, and the results show a little deviation from additivity. Accordingly, these molten binary systems are regarded as a simple mixture of the components and do not form a complex in spite of the existence of highly electrical charged La^(3+) ion.

keyword :

3.2% silicon steel with B, N, S and Mn as inhibitor was studied by varying final cold reduction ratioes from 60% to 90%. The effects of final cold reduction ratioes on texture development of cold rolled sheets and of subsequently primary recrystallized sheets were investigated by X-ray pole figure method and these results were related to secondary recrystallized texture by the means of magnetic induction measurement. As the final cold reduction ratio increased up to 85%, {111} (112) component of the cold-rolled texture increased slightly and then decreased. And {001} <110> component of the cold-rolled texture increased continuously up to the 85% cold reduction and was the most stable component in the cold-rolled specimens. This experimental result is similar to the result obtained in the other case using AlN＋MnS as inhibitors. In the primary recrystallized texture {001} <110> and {111} <112> components were relatively strong, and {111} <101>, {112} <110> and {110} <001> components were also strong. The texture development up to 80% cold reduction was almost the same but {110} <001> component was getting stronger after 80% cold reduction. The degree of alignment of {110} <001> texture after the secondary recrystallization was the highest at around 85% cold reduction.

keyword :

A mathematical model has been presented for solidification analysis of ESR ingots. A general finite differential equation was formulated for computer simulation by the use of this model. The effects of ingot size, temperature at slag-metal interface, melting rate, and effective thermal conductivity in liquid on solidification profiles were investigated. The model proposed in the present work was successfully applied in treating solidification analysis of ESR ingots.

keyword :

This is the first of two articles dealing with the orientation determination of the FCC structure using non-parallel {111} traces. In this first article, the Hoekstra equations are deduced on the basis of the Euler angles between the specimen and crystal coordinate systems. A method of computerization of calculations relative to crystal orientation as well as of the stereographic projection drawing is also presented.

keyword :

The behaviors of desiliconization of the hot pig iron by adding the solid iron oxide as a desiliconizing agent were studied. Even when small amount of iron oxide is added, the degree of desiliconization can be reached to 70% under the condition of slag with the basicity over 1.0. During desiliconizing treatment, the competiting reactions such as demanganization and decarburization are suppressed in the above slag condition. In (FeO) content less than 5%, the distribution ratio of silicon between slag and metal is approximately in agreement with the equilibrium value.

keyword :

keyword :

keyword :

keyword :

keyword :