Radioactive properties of fragmental products

As a result of the difficulties of preparation and the high cost of sources of ionizing radiations from individual fragmental isotopes, it is expedient to examine the possibility of using sources of an unseparated mixture of uranium fission products. Theoretical and experimental data on the variation of energy and intensity of the total and also - and -radiations with time are given for different fragmental isotopes and their mixtures. It is shown that the mean energy of -active isotopes reaches a maximum for two-year fragments, while for -active isotopes the maximum is found in the case of two to six month fragments.     

Characteristic features of the microstructure and sorption properties of coals for various gases

Academy of Sciences of the USSR, Moscow. Translated from Fiziko-Tekhnicheskie Problemy Razrabotki Poleznykh Iskopaemykh, No. 1, pp. 60–67, January–February, 1989.     

Coatings Deposited by the High-Velocity Flame Spraying Method

The properties (porosity, hardness, wear resistance) of coatings obtained by high-velocity flame spraying were studied. It was shown that high-velocity spraying produces highly dense coatings (porosity below 3%) which have good abrasion resistance under extreme conditions: resistance to abrasive-erosion was 10-12 times better than that of uncoated steel. Abrasive wear resistance at low attack angles was obtained in coatings of maximum hardness, i.e., hardness above that of the abrasive. At high attack angles an optimum ratio of hardness to ductility is desired. The optimal structure for WC Co coatings is the so-called twice cemented hard alloy structure, in which granules or particles of WC Co are included within the cobalt binder. At large attack angles the concentration of carbide phase should exceed 50%, and at normal angles is optimally 20-30%.     

Estimating the intermolecular repulsion energy of sorbate molecules in coal micropores

Institute of Mining, Siberian Department, Academy of Sciences of the USSR, Novosibirsk. Translated from Fiziko-Tekhnicheskie Problemy Razrabotki Poleznykh Iskopaemykh, No. 5, pp. 48–56, September–October, 1989.     

Stabilizing the Mechanical Properties of the Rolled Products after Reconstruction of the Laminar Cooling System on a 1700 Continuous Hot-Strip Mill

The Ispat Karmet plant rebuilt the strip cooling system on the runout table of its 1700 hot-strip mill in 2001. The new laminar cooling system ensures the required mechanical properties by using different cooling regimes for different product sizes and grades. Use of the appropriate cooling regime produces a microstructure characterized by minimal variation of grain size through the thickness of the product. Introduction of the new cooling system increased the percentage of rolled metal with the specified mechanical properties from 97.1% in 2002–2003 to a present level of 98.9%. The system has also stabilized the distribution of those properties both along individual products and within given product batches.Translated from Metallurg, No. 2, pp. 42–44, February, 2005.