Effect of Unstable Tapping of Smelting Products on the Performances of the Evraz Ntmk Blast Furnaces

Metallurgist - Timely and full tapping of liquid smelting products is an important condition for forcing the blast-furnace process. Unstable tapping of iron and slag leads to fluctuations of the...     

Hydride Vapor-Phase Epitaxy of a Semipolar AlN(10$$bar {1}$$2) Layer on a Nanostructured Si(100) Substrate

Technical Physics Letters - We propose a method for the synthesis of hexagonal AlN layer on Si(100) substrate with a V-groove nanostructured surface where the angle between the sloped nanoridge...     

Effect of the surface roughness of friction stir welded joints on the fatigue characteristics of welded joints in V-1461 and V-1469 aluminium–lithium alloys

Investigations were carried out into the effect of friction stir welding conditions of V-1461 and V-1469 aluminium–lithium alloys on surface roughness and mechanical properties of welded joints. The general parameter of the welding conditions was the heat input coefficient determined by the ratio of the speed of rotation of the tool to the welding speed. The optimum range of friction stir welding conditions of sheets of the investigated alloys was determined. In this stage, the surface finish of the welded joint after welding is much better (required for increasing the fatigue characteristics and high-quality deposition of protective coatings), there are no defects and the strength of the welded joint is equal to 0.75–0.85 of the strength of the parent material. The production of the welded joints with reduced surface roughness (R_z ≤ 40 μm) greatly increases the fatigue characteristics of the welded joints (low-cycle fatigue strength equals more than 300,000 cycles without fracture).     

Development of research methods for ceramic materials

Translated from Steklo i Keramika, No. 2, pp. 14–15, February, 1989.     

Effect of an electric field on concentration limits for propane flame propagation in air

Balashikha. Translated from Fizika Goreniya i Vzryva, Vol. 27, No. 1, pp. 26–28, January–February, 1991.     

Characteristics of mining quarries on hydraulic-fill dumps

Conclusion The given classification of waste quarries being mined and the recommendations on calculating the stability of their slopes are aimed at increasing the safety of performing works on hydraulic-fill dumps with orientation toward the wider use of wastes in the economy.Translated from Gidrotekhnicheskoe Stroitel'stvo, No. 6, pp. 14–15, June, 1990.     

Design of hydraulic-fill dumps and environmental protection

Conclusion Hydraulic-fill dumps must be designed with minimum appropriation of land areas with the construction of large borrow pits in the base. To prevent seepage of water into groundwaters, it is necessary to construct a watertight facing in the base of the dump and particularly in the pit by one of the following methods: striplike placement of soil on ice; delivery of the mixture into the pit with excavation of the soil in piles by a monitor; excavation of the pit by a dredge and hydraulic filling of narrow-profile embankments.Translated from Gidrotekhnicheskoe Stroitel'stvo, No. 2, pp. 46–48, February, 1992.     

Main points of the Guide to surveys for substantiating the designs of small hydroelectric stations

Translated from Gidrotekhnicheskoe Stroitel'stvo, No. 3, pp. 43–46, March, 1993.     

Neutron activation cross-sections for Cr isotopes at 14.6 MeV neutron energy

Neutron activation cross-sections for Cr isotopes were measured using Ge(Li) γ-spectroscopy of the reaction products. The linear least-squares method was used to resolve the interfering reactions. The results are compared with other data measured at 14.6–14.8 MeV.