Influence of Sodium Microalloying on Rolling Contact Endurance and Mechanical Properties of Hot-Deformed Powder Steels

Russian Journal of Non-Ferrous Metals - Rolling bearing rings comprise a large reserve for expanding powder metallurgy production. This reserve is being incompletely implemented. The hot forging of...     

Results of testing a centrifugal bubble singlet-oxygen generator

The results of parametric tests of a centrifugal bubble singlet-oxygen generator based on the reaction of chlorine with an alkaline hydrogen peroxide solution have been given. The utilization of chlorine grows with bubble-layer height, whereas the relative content of O₂(¹Δ) remains constant. Growth in centrifugal acceleration leads to a more efficient utilization of chlorine. A specific oxygen output of more than 1 mmole·cm⁻²·sec⁻¹ from the bubble layer for a degree of chlorine utilization of ∼95% and a singlet-oxygen yield of more than 50% has been attained. It has been shown that a centrifugal bubble singlet-oxygen generator is an efficient energy source for an oxygen-iodine laser. __________ Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 80, No. 3, pp. 121–128, May–June, 2007.     

The structure and properties of forged composite high-speed steel: Titanium carbide

The structure of a powder composite (carbide steel) based on high-speed steel with dispersed inclusions of titanium carbide and obtained by forging powdered billets is investigated. The elemental and chemical composition of the material is determined. The physicomechanical properties of the forged carbide steels obtained are compared with those obtained by other methods.     

The quality of hot-stamped powder carbide steel

The quality of hot-stamped powder carbide steel is considered within a comprehensive approach to the development of its production technology. Means are outlined for ensuring satisfactory quality of such steel in its production.     

Singlet oxygen generator based on the reaction of chlorine with filament-guided jets of basic hydrogen peroxide

The chlorine utilization efficiency and singlet oxygen concentration are determined as functions of the chlorine flow rate, the base concentration, and the flow rate and temperature of basic hydrogen peroxide in a singlet oxygen generator based on the reaction of chlorine with filament-guided descending basic hydrogen peroxide jets. The effluent gas, without aerosol entrainment, contains about 10% residual chlorine and more than 60% singlet oxygen.     

Principles of standardization of the articles of complex shape produced by the methods of powder metallurgy

Translated from Poroshkovaya Metallurgiya, No. 8(356), pp. 97–104, August, 1992.