15-5PH stainless steel castings are key components in fracturing trucks. However, DS-type inclusions can lead to fatigue failure of the material. To elucidate formation mechanism large-size inclusions, evolution, growth, and aggregation during vacuum oxygen decarburization, ladle refining, casting were studied. The results show that with sizes larger than 20 μm CaO–Al2O3–SiO2–MgO–CaS composite ...

in this study, mixed metal oxides al2o3/mgo/tio2 coatings with al/mg/ti ratio of 5:1:3 and 2.5:3:4 were coated on aluminum by sol-gel method. the surface morphology, phase analysis, thermal behavior and the corrosion behavior of the al2o3/mgo/tio2 coatings were characterized by (sem), (xrd), (tg-dta) and potentiodynamic polarization test in 3.5 wt.% nacl solution. the results demonstrated that ...

The recycling options of spent MgO-C refractories from an electrical arc furnace (EAF) have been evaluated. The economic, quality of spent refractories and products made from it, the ease of implementation of a recycling practice and the interest of steel melt shops were considered. It was decided that the best option of most EAF shops would be to recycle spent MgO-C refractory as a foaming sla...

With a view to understanding the performance of blast furnace slag with high Al2O3 content, effects w(MgO)/w(Al2O3), w(CaO)/w(SiO2), and w(Al2O3) on melting (melting characteristic temperature heat) content were investigated by differential scanning calorimeter (DSC) method. Experimental results indicate that end (Tend) for almost all slags has no obvious change increase w(CaO)/w(SiO2) will rai...

Controlling inclusion content in high chromium steel is very important to prevent submerged entry nozzle from clogging continuous casting and avoid the negative impacts of inclusions on properties. Therefore, effects temperature elements phase stability diagram should be clarified bearing steel. However, effect boundaries MgO, MgO∙Al2O3 Al2O3 are much different among researchers. The direction ...

The elimination of inclusions in steelmaking processes has been widely studied. removal by slags containing the rare earth oxide Ce2O3 are studied using an integrated numerical model. model involves inclusion motion model, interfacial tension calculation surface slag, and mass action concentration based on ion molecule coexistence theory. behaviors both solid Al2O3 50%wtAl2O3–50%wtCaO liquid va...

A relatively simple model, the associate species model, is being applied to nuclear waste glass compositions in order to accurately predict behavior and thermodynamic activities in the material. In the model, the glass is treated as a supercooled liquid, with the liquid species allowed to exist below their melting point. The approach requires an initial assembly of binary and ternary oxide liqu...

Abstract Pelites (shales and mudstones) are arguably the most important rock type for interpreting metamorphism. Their significance derives from their widespread occurrence range of mineral assemblages they develop at different conditions pressure temperature. We compiled a global database 5729 major-element whole-rock analyses pelites metamorphic grades to granulite-facies paragneisses) (1) de...

Blast-furnace slag is one of the main by-products produced in process blast-furnace ironmaking. Its metallurgical properties have an important impact on smooth operation and long life blast furnaces. In this paper, activity MgO a CaO-SiO2-MgO-Al2O3 quaternary system was measured using reference-slag method at 1773–1873 K. The effects temperature coefficient Mg Sn were discussed. results showed ...

Electrochemical nature of metallurgical reaction arouses more and more attentions, and the most closely related is the electrical conductivity of molten slag. The electrical conductivity of molten slag is not only an important physical property that plays a prominent role in modeling and operating the electric smelting furnace and optimizing the metallurgical process, but also important for und...