scholarly journals Effect of heat treatment of quartzite on the mechanism of destruction of the lining of induction furnaces

2019 ◽  
pp. 49-53
Author(s):  
A. S. Zavertkin
Keyword(s):  
Heat Treatment ◽  
Cast Iron ◽  
Raw Materials ◽  
Iron And Steel ◽  
Secondary Factor ◽  
Firing Mode ◽  
Induction Crucible Furnaces

The mechanism of wear of quartzite lining of induction crucible furnaces during the smelting of iron and steel is presented. It has been established that the main cause of lining wear is a decrease in its strength caused by the transition of the tridimite joint into cristobalite, which is much easier to wash off the walls of the crucible with moving metal and slag. The second important factor of wear is the choice of quartzite raw materials, its material and granulometric compositions, the firing mode and the technology of melting during operation of the furnace. Silicon recovery from silica of carbonization lining by carburizer and cast iron, which is part of, is a secondary factor of crucible lining wear. Ill. 4. Ref. 5. Tab. 1.

RESTORATION OF WORN SURFACES FROM CAST IRON AND STEEL PARTS BY ELECTRIC ARC WELDING WITH FERROMAGNETIC CHARGE

2020 ◽  
Vol 4 (2) ◽  
pp. 112-116
Author(s):  
V.G. VYALKOV ◽  
S.N. GLAZUNOV ◽  
P.A. TSIRKOV
Keyword(s):  
Heat Treatment ◽  
Cast Iron ◽  
Arc Welding ◽  
Surface Hardness ◽  
Electric Arc ◽  
Subsequent Heat Treatment ◽  
Iron And Steel ◽  
Electric Arc Welding ◽  
Worn Surfaces

In experiment, worked out the parameters of deposition and the composition of the ferromagnetic charge, which ensure a defect-free weld layer (no pores, inclusions, hot and cold cracks) with a surface hardness of 52- 56 HRC without additional technological measures (heating products) and subsequent heat treatment.

scholarly journals Analysis of the use of rare earth metals in ferrous metallurgy of Russia and world

2020 ◽  
Vol 63 (6) ◽  
pp. 405-418
Author(s):  
A. I. Volkov ◽  
P. E. Stulov ◽  
L. I. Leont’ev ◽  
V. A. Uglov
Keyword(s):  
Rare Earth ◽  
Cast Iron ◽  
Ferrous Metallurgy ◽  
Raw Materials ◽  
Rare Earth Metals ◽  
Calculated Data ◽  
Iron And Steel ◽  
The World ◽  
Steel Alloying ◽  
Former Ussr

The analysis of the current state of production of rare earth metals (REM) in Russia and in the world was made. Information about REM production in different countries of the world and about new foreign projects for REM production and processing is provided. The article presents the balance of production, export and import of raw materials and products with REM, including scandium and yttrium, in Russia. The maximum volume of REM consumption in Russia was calculated taking into account imported products with REM. This data was compared with other countries, including the former USSR. Much attention is paid to the use of REM in metallurgy. Data on the influence of REM on the properties of cast iron and steel are presented. Information is given about the forms of REM used for their use in the Russian ferrous metallurgy. We have studied the structure of REM consumption in ferrous and non-ferrous metallurgy. On the example of two enterprises (one of them specializes in mass production, and the second – on production of special steels), the structure of REM consumption for steel alloying was studied by type and scope of its application. The development peculiarities of REM consumption in Russian ferrous metallurgy were investigated. The volume of consumption was calculated; data on imports of raw materials with REM for metallurgy and the producers of ferroalloys with REM in Russia is given. We have analyzed the spectrum of steel products with REM. A comparison of the consumption of REM in the metallurgy of Russia and foreign countries is presented. The reasons for insufficient consumption of REM in the Russian metallurgy are considered, an assessment is given on the change in production volumes of certain types of steel and cast iron, and recommendations are made on the growth of REM consumption in metallurgy.

Cast Iron and Steel Smelting in Induction Crucible Furnaces of Industrial Frequency

2020 ◽  
Vol 299 ◽  
pp. 530-534
Author(s):  
Viktor A. Kukartsev ◽  
Vladislav V. Kukartsev ◽  
Vadim S. Tynchenko
Keyword(s):  
Cast Iron ◽  
Induction Melting ◽  
Metal Scrap ◽  
Steel Smelting ◽  
Medium Frequency ◽  
Iron And Steel ◽  
Advantages And Disadvantages ◽  
Induction Crucible Furnaces ◽  
Temperature Melting ◽  
Industrial Frequency

A brief analysis of the cast iron and steel smelting in induction furnaces of industrial and medium frequency has been carried out. The analysis of the used metal scrap for the smelting of synthetic iron in induction melting furnaces with a padded lining of a lining mixture, based on quartzite, is carried out. The requirements for temperature melting modes, which are regulated by this type of melting furnaces developers, are reflected. The advantages and disadvantages of using induction crucible furnaces of industrial and medium frequency are considered. The features of smelting synthetic pig iron in Russia are noted, the main of which are the following: the absence of cast iron scrap, which makes it necessary to use a metal scrap from a single steel scrap, and use temperature melting conditions above 1450 ° C; use a lining based on quartzite, as the cheapest, but sharply reducing its resistance to the operation of the furnace at such melting temperatures (from 300-350 to 200-250 smelts). The actuality of the possibility of steel smelting in induction crucible furnaces of industrial frequency with the use of acid lining, based on the Pervouralsk quartzite, is substantiated. It is explained by the fact that existing foundries are equipped mainly with induction melting furnaces of industrial frequency, and the use of induction melting furnaces of medium frequency requires considerable material costs.

ON THE PROCESSING OF HEMATITE RAW MATERIALS AT THE KRYVOROZHSK MINING AND PROCESSING PLANT OF OXIDIZED ORE ON TECHNOLOGY OF DIRECT RECOVERY ITmk3

2018 ◽  
pp. 32-37
Author(s):  
P.I. Loboda ◽  
Younes Razaz ◽  
S. Grishchenko
Keyword(s):  
Magnetic Properties ◽  
Cast Iron ◽  
Iron Content ◽  
Raw Materials ◽  
Direct Reduction ◽  
Processing Plant ◽  
High Iron Content ◽  
High Iron ◽  
Direct Restoration ◽  
First Time

Purpose. To substantiate the efficiency of processing hematite raw materials at the Krivoy Rog Mining and Processing Plant of Oxidized Ores using the direct reduction technology itmk3®. Metodology. Analysis of the results of the itmk3® direct restoration technology developed by Kobe Steel Ltd., Japan and Hares Engineering GmbX, Austria, with a view to using it to process Krivbass hematite ores into granulated iron (so-called “nuggets”). Findings. The involvement in the production of hematite ores (oxidized quartzite) of Krivbass with high iron content, but with low magnetic properties for their processing into granular cast iron is grounded. Originality. The use of itmk3® direct reduction technology from Kobe Steel Ltd., Japan and Hares Engineering GmbH, Austria for the processing of Krivbass hematite ores into granular cast iron is justified for the first time. Practical value. The efficiency of the use of hematite ores (oxidized quartzite) has been substantiated, which can significantly reduce the costs in the mining cycle for the economical production of metallurgical products.

MEEHANITE GD

Alloy Digest ◽  
1964 ◽  
Vol 13 (1) ◽  
Keyword(s):  
Fracture Toughness ◽  
Shear Strength ◽  
Cast Iron ◽  
Physical Properties ◽  
Tensile Properties ◽  
High Strength ◽  
Heat Treating ◽  
Damping Capacity ◽  
Iron And Steel ◽  
Lubricating Properties

Abstract MEEHANITE-GD is a high strength iron casting having high damping capacity, self-lubricating properties, and good machinability. It combines the good properties of both cast iron and steel. This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and compressive and shear strength as well as fracture toughness and fatigue. It also includes information on casting, heat treating, machining, and joining. Filing Code: CI-32. Producer or source: Meehanite Metal Corporation.

MEEHANITE GA

Alloy Digest ◽  
1954 ◽  
Vol 3 (1) ◽  
Keyword(s):  
Fracture Toughness ◽  
Shear Strength ◽  
Cast Iron ◽  
Physical Properties ◽  
Machine Tools ◽  
High Strength ◽  
Heat Treating ◽  
Damping Capacity ◽  
Iron And Steel ◽  
Lubricating Properties

Abstract MEEHANITE GA is a high strength iron casting having high damping capacity, self-lubricating properties, and good machinability. It combines the good properties of both cast iron and steel. Applications include machine tools, gears, shafts, and housings. This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and compressive and shear strength as well as fracture toughness and fatigue. It also includes information on heat treating and machining. Filing Code: CI-5. Producer or source: Meehanite Metal Corporation.

BÖHLER W403 VMR

Alloy Digest ◽  
2013 ◽  
Vol 62 (9) ◽  
Keyword(s):  
Heat Treatment ◽  
Chemical Composition ◽  
Physical Properties ◽  
Tool Steel ◽  
Raw Materials ◽  
Heat Treating ◽  
Diffusion Annealing ◽  
Selection Of

Abstract Böhler (or Boehler) W403 VMR is a tool steel with outstanding properties, based not only on a modified chemical composition, but on the selection of highly clean raw materials for melting, remelting under vacuum (VMF), optimized diffusion annealing, and a special heat treatment. This datasheet provides information on composition, physical properties, and elasticity. It also includes information on forming and heat treating. Filing Code: TS-721. Producer or source: Böhler Edelstahl GmbH.

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