Influence of Radial-Shear Rolling Conditions on the Metal Consumption Rate and Properties of D16 Aluminum Alloy Rods

Metallurgist - The effect of five cases of temperature-and-speed conditions in radial-shear rolling (RSR) of D16 alloy is analyzed. The temperature of the rod after each pass is obtained from the...     

Effect of Preliminary Deformation of Continuously Cast Billets by Radial-Shear Rolling on the Structure and Properties of Hot-Rolled Chromium-Containing Steel Pipes

Metallurgist - The paper analyzes the effect of preliminary deformation of continuously cast billets (CCB) made of chromium-containing grades of steel by radial-shear rolling (RDR) on the structure...     

Effect of Radial Shear Rolling on the Structure and Mechanical Properties of a New-Generation High-Strength Aluminum Alloy Based on the Al – Zn – Mg – Ni – Fe System

Metal Science and Heat Treatment - A high-strength aluminum alloy based on the Al – Zn – Mg – Ni – Fe system is studied in deformed condition after radial shear rolling with...     

Development of the Design of a Roll-Type Electrobaromembrane Apparatus for Separating Process Fluids and a Method for Calculating the Area of Membranes

Chemical and Petroleum Engineering - The design of a roll-type electrobaromembrane apparatus has been developed, in which a high efficiency of mixing of multicomponent solutions is ensured when...     

New methods for the preparation of high-octane components from catalytic cracking olefins

A new method has been suggested for the preparation of high-octane components from the butane–butylene fraction (BBF) in two stages. At the first stage, the BBF olefins are oxidized with N₂O into carbonyl compounds with high selectivity without forming the products of deep oxidation and water. The process occurs in the gas phase in a flow reactor without using a catalyst at a temperature of 400°C and a pressure of 2 MPa with high conversion of both olefins and nitrous oxide. The blending octane number of the oxidation product is 118–133 (RON) and 99–104 (MON). At the second stage, the mixture of carbonyl compounds is hydrogenated with hydrogen in the presence of the Ni/Al₂O₃ catalyst. The hydrogenation occurs at 150–160°C in a flow reactor in the gas phase. The aldehydes are completely transformed into alcohols, while the ketones can remain in the product under certain conditions. The blending octane number of the hydrogenation product is 111–112 (RON) and 95–96 (MON), which is smaller than for the BBF oxidation product, but larger than for the alkylate obtained in the course of conventional butene alkylation with isobutane (RON is 95–97 and MON is 93–95). Synthesis of high-octane components by this procedure can be useful in practice, especially in productions with huge release of nitrous oxide.     

Simulation and Experimental Evaluation of Circumferential Fracture Conditions in Hot Radial–Shear Rolling

Metallurgist - The conditions of circumferential fracture during hot radial-shear rolling are simulated using QForm software. The fields of modified Cockroft–Latham criterion and temperature...     

Studying the Influence of Radial-Shear Rolling on Thermal Deformation Conditions of A1050 Processing

Russian Journal of Non-Ferrous Metals - The analysis of the influence exerted by the deformation techniques on the conditions of radial-shear rolling (RSR) of commercial purity aluminum A1050 is...     

Thermochemical bruche dressing

Conclusions Research and pilot-plant tests have been performed on a simple technology for purifying brucite from the Kul'dur deposit to eliminate calcium oxide, where the main operations are heat treatment, crushing, and leaching out the calcium oxide with water or weak acid.First-class electrotechnical periclase has been made from the treated product.Translated from Ogneupory, No. 4, pp. 27–32, April, 1990.