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Search Results: 1 - 10 of 213 matches for " Metallurgy "
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DEL EDITOR. WATER IN MINING
THE AUSTRALASIAN INSTITUTE OF MINING AND METALLURGY
DYNA , 2012,
Abstract:
A MODEL OF BUTTERFLY CATASTROPHE FOR ANODE EFFECT IN ALUMINA ELECTROLYSIS
PAN Yue Qingdao University of Metallurgy,Mining,
PAN
,Yue,Qingdao,University,of,Metallurgy,and,Mining

金属学报(英文版) , 1991,
Abstract: A model of butterfly catastrophe is confirmed based on the matching and fitting the previous experimental data from alumina electrolysis when anode effect occurs.The complicated behaviour of the cryolite-alumina melt system with varying parameters could be generally described by this model.Therefore,the anode effect and its occurrence may be thoroughly understood.
RESEARCH ON AUSTENITIC Cr-Mn-C-N STAINLESS STEELS

Hsiao Chi-mei Peking Institute of Ferrous Metallurgy,

金属学报 , 1958,
Abstract: Over 200 Cr-Mn-C-N experimental steels have been systematically studied bya combination of microscopic examination,X-ray diffraction,electrolytic extraction,chemical analysis,hardness and magnetic measurements,density and dilatometricmethods,oxidation test,tensile tests at both room-and elevated-temperatures,creep-rupture test,etc.,and the main findings are presented as follow:(1)Stable austenitic region.(2)Solid state reactions:martensitic transformation,precipitation reactions,and formation of sigma phase.(3)Room-and elevated-temperatures properties,and their relation to the che-mical composition of the steels.(4)Strengthening effect of interstitial solid solution.(5)Effect of precipitation reaction on elevated-temperature strength.(6)Effect of V,W,Mo,Nb,B and Si.(7)Tentative recommendation for indus rial applications.
EFFECT OF Ce ON PREFERRED ORIENTATION OF GRAIN IN OXIDE SCALE ON Fe-15Cr ALLOY

by GAO Huaisun,LI Bei Baotou Research Institute of Metallurgy,

金属学报 , 1985,
Abstract:
BEHAVIOR OF CARBON AND OXYGEN IN FLOATING-ZONE MELTING OF PURE IRON

WANG WEI-CHIEH Institute of Metallurgy,Academia Sinica,

金属学报 , 1965,
Abstract: Vacuum melted and cast electrolytic iron bar, 10 mm in diameter, has been refinedby the floating-zone technique for eleven passes in an atmosphere of hydrogen. Thetravel rate of the zone was 1-2 mm/min and the lower chuck was rotated at a speed of3.5-22 rpm. On the basis of the measured distribution coefficient of carbon and metallographicexamination of the non-metallic inclusions the possibility of removing carbon and oxygenfrom iron by floating-zone melting is discussed.
THE UPPER BOUND ELEMENT TECHNIQUE OF SOLVING AXISYMMETRIC EXTRUSION FORCE

XU Qiliang,SHI Wenhua Xi'an Institute of Metallurgy,Construction Engineering,

金属学报 , 1985,
Abstract: The design of a mode of the spatially truncated rigid cone element to con-form with the metal flow was made by the application of the upper bound the-ory-upper bound element technique.The problem to estimate the upper bound ofaxisymmetric extrusion deformation force may be solved consequently.Solutioncalculated by this mode after trial done on practice is in agreement with the actu-al one and the precision of calculation of the extrusion force seems to be muchimproved.
SOME PROBLEMS OF THE HEAT FLOW THROUGH THE BLAST FURNACE HEARTH WITH CARBON LINING

WAN SHU-MING Institute of Chemical Metallurgy,Academia Sinica,

金属学报 , 1959,
Abstract: The effect of the thermal conductivities, proportion and distribution of some refractory liningmaterials in the hearth, cooling and salamander on the temperature distribution and heat loss hasbeen reviewed critically. The temperatures of the bottom with all ceramic lining can be decreasedby substituting carbon lining from its periphery, and the carbon lining displays a "transitional"cooling effect. It is justly the advantage of the high thermal conductivity of the carbon lining.Furthermore this effect has a certain effective limit. It is pointed out that the more the tem-perature of the bottom to be decreased, the lower the thermal conductivity of the most innerlining material and the higher the thermal conductivity of the more outer lining layer. This isa very important principle in this problem. By this principle, we can see that the transitionalcooling effect of the carbon lining can appear only when it is not used as the most inner lining.By the same reason, it is obvious that the layer with higher thermal conductivity, like graphitelayer, under the bottom behaves as a underhearth cooling. It is suggested that the new approach to decrease the heat loss is using the material as themost inner lining with its thermal conductivity as small as possible. A new cooling method,called cascade cooling, was described; it is using several lining layers under the bottom, of whichthe inner one has higher thermal conductivity than the outer one. It is pointed out that in theexisting thermal model for the hearth the salamander formed actually was not taken into account,thus it is very inadequate to describe the actual state of the hearth. This is a great defect of theexisting thermal model experiment. Its improvement was described. It is proposed that the de-pendence of the heat flow on the inner and outer diameter of the hearth and the thickness ofits various linings should be studied; that the effect of the thermal conductivity of lining on theheat flow and the graphitizing of the carbon lining ought to investigate further.
PHYSICAL CHEMISTRY OF DEOXIDATION OF STEEL

CHOU YUAN-HSI Institute of Metallurgy,Ceramics,Academia Sinica,

金属学报 , 1958,
Abstract:
EFFECTS OF HEAT TREATMENT ON POSITRON ANNIHILATION OF GLASSY BPSCCO
热处理对玻璃态Bi1.6Pb0.4Sr1.9Ca2Cu3.1Oy正电子湮没特性的影响

ZHANG Hong Shanghai Institute of Metallurgy,Academia Sinica,
张宏

金属学报 , 1992,
Abstract: Effects of isochronal annealing on the positron annihilation of glassy Bi_(1.6)Pb_(0.4)Sr_(1.9)Ca_2Cu_(3.1)O_y(BPSCCO) have been reported. It is shown that the crystallization in- fluences obviously the positron annihilation characteristics of BPSCCO. A maximum is found inthe region of crystallization temperature in curves of mean lifetime and peak / wing ratio, one of Doppler lineshape parameter, with annealing temperature; the bulk lifetime of positron annihi-lation in the glassy state is longer than that in the crystalline one. Positron annihilation spectroscopy could be used for studying structure of glassy BPSCCO and its change with heattreatment.
THE EFFECT OF THE THICKNESS AND THE THERMAL CONDUCTIVITIES OF THE REFRACTORY LININGS IN THE BLAST FURNACE BOTTOM ON THE TEMPERATURE FIELD OF THE BOTTOM

WAN SHU-MING Institute of Chemical Metallurgy,Academia Sinica,

金属学报 , 1959,
Abstract:
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