Thermal analysis of indefinite chill cast iron modified with ferrovanadium and ferrotungsten

Klančnik, Urška; Habjan, Jakob; Klančnik, Grega; Medved, Jožef

doi:10.1007/s10973-016-5434-6

Cited by 13 publications

(4 citation statements)

References 8 publications

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“…The analysis of the main phases of cast iron: titanium carbide, phosphide eutectic and perlite matrix was performed using microstructure analysis [3]. Working out the optimal chemical composition it is necessary to try to obtain a favorable microstructure of cast iron for each specific case [3][4][5][6][7][8][9][10]. The naturally alloyed cast iron was found to have all the characteristics necessary to increase the service life of wear-resistant and heat-resistant products: high strength and wear resistance, and in the presence of phosphide eutectic, also good fluidity.…”

Section: Research Resultsmentioning

confidence: 99%

Application of Alloyed Cast Iron to Increase the Durability of Products of the Mining and Metallurgical Industry

et al. 2020

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The article shows the relevance of the use of alloyed cast iron in mining and metallurgical engineering. The use of cast iron alloyed with titanium and vanadium has not been sufficiently studied for the working bodies and friction units of mining machines, such as pumps, coal scoops, hydrocyclones, crushers and mills. They have the main abrasive type of wear. This work considers the influence of titanium and vanadium on the mechanical properties. The performance indicators of parts of mining machines and metallurgical products in contact with high-abrasive and high-temperature environments is also considered. The optimal content of titanium and vanadium in gray cast iron in the range of 0.05-0.1% is set. This provides the required strength properties of the components, while increasing their heat resistance. Bushings made of this cast iron have the required wear resistance and can improve the operational reliability of equipment in mining and metallurgical industries.

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Section: Research Resultsmentioning

confidence: 99%

Application of Alloyed Cast Iron to Increase the Durability of Products of the Mining and Metallurgical Industry

et al. 2020

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“…For cast irons, some important parameters are found in this way, such as liquidus temperature (austenite or primary graphite formation start), the start temperature of eutectic freezing (nucleation), the lowest and the highest eutectic temperatures and temperature of the end of solidification. By comparing these events with equilibrium temperature in stable (graphitic) and metastable (carbidic) solidification systems, some important information can be obtained, such as carbide to graphite transition, eutectic recalescence level (important as shrinkage formation sensitivity), primary (solidification) structure qualitative parameters, efficiency of inoculation (graphitizing treatment), graphitizing potential, graphite morphology, sensitivity to inter-eutectic cells carbide or microshrinkage formation etc [1][2][3][4][5][6][7][8][9][10][11][12] .…”

Section: Special Reviewmentioning

confidence: 99%

Simultaneous thermal and contraction / expansion curves analysis for solidification control of cast irons

et al. 2020

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T he final control of the iron castings' quality involves different techniques, including chemical analysis, microstructure evaluation, physical and mechanical properties measurements, castings' surface parameters and casting soundness control, etc. It is important to forecast the final castings' characteristics before mould filling, by iron melt solidification control, applying techniques able to illustrate the eutectic undercooling values referring to the stable and metastable equilibrium temperatures, carbide or graphite formation tendency, a specific graphite morphology occurrence, metal matrix make-up, shrinkage and microshrinkage sensitivity, etc.Thermal (cooling curve) analysis has a wide application in the worldwide foundry industry to quickly control the solidification behaviour of foundry metallic alloys, especially for cast irons and non-ferrous alloys. At first, cooling curve analysis (CCA) *Iulian RiposanBorn in 1948, Ph.D, Professor. His research interests mainly focus on processing and complex characterization of lamellar, nodular, compacted/vermicular and coral graphite irons, austempered cast irons with lamellar, nodular, compacted or coral graphite, cast iron matrix composites, cupola and electric furnaces operations. To date, he has published more than 300 technical papers and 3 technical books, and holds 35 patents. He is the honorary member of Technical Sciences Academy of Romania, the Past President of Romanian Foundry Technical Association (ATTR) (1996 -2014), and an international member of American Foundry Society.

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“…Microalloying by vanadium is one of the prospective directions for rise of operating and mechanical properties, saving of critical alloying elements. Based on the generalized data [7][8][9][10][11], it is suggested that vanadium is more string deoxidizer in comparison with silicon, but more weak one than aluminium. Vanadium is widely used in production of low-alloy steels, due to its high hardenability, high strength and ductility both in rolled and normalized state, as well as good weldability.…”

Section: Introductionmentioning

confidence: 99%

Smelting of vanadium-containing alloys with using non-standard reducing agents

Makhambetov,

Vorobkalo,

Baisanov

et al. 2023

cisisr

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The object of the study in this work is the process of smelting of vanadium alloying composition and vanadium ferroalloy using non-standard reducing agents, such as silicon-aluminum ferroalloy (ferrosilicoaluminum) and high-ash coal. Within the framework of this work, it is proposed to use silicon-aluminum reducing agents and highash coal as a replacement for expensive aluminum powder, ferrosilicon, and metallurgical coke which are used in conventional technologies for smelting of vanadium alloys and alloying compositions. To develop the technology for smelting of vanadium alloying composition using a silicon-aluminum reducing agent, a series of large-scale laboratory tests was carried out in the smelting furnace with provided installation for temperature recording, which was specially assembled by employees of the Zh. Abishev Chemical and Metallurgical Institute (ChMI). Tests on the smelting of a vanadium-containing ferroalloy using vanadium slag obtained by smelting of vanadium alloying composition by ladle treatment method, as well as converter vanadium slag, quartzite and high-ash coal (ash content 45-50 %) as a reducing agent, were also carried out in large-scale laboratory conditions in the ore smelting furnaces with 200 kVA transformer power. Experimental tests have shown positive results on the use of these non-conventional reducing agents in the composition of charge materials for smelting of vanadium-containing alloys and alloying compositions. Vanadium alloying composition was obtained by ladle treatment method using ferrosilicoaluminum, the average chemical composition of this alloying composition was, %: V 55; Si 10-24; Al 4-9 and Fe 10-30. Extraction of vanadium in the alloy was 70-80 %. Vanadium alloy was obtained by carbothermal method using high-ash coal and is characterized by the following average composition, %: V 4-10; Si 40-55; Al 15-20 and Fe 13-25. The degree of vanadium extraction makes 70 %.

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Thermal analysis of indefinite chill cast iron modified with ferrovanadium and ferrotungsten

Cited by 13 publications

References 8 publications

Application of Alloyed Cast Iron to Increase the Durability of Products of the Mining and Metallurgical Industry

Application of Alloyed Cast Iron to Increase the Durability of Products of the Mining and Metallurgical Industry

Simultaneous thermal and contraction / expansion curves analysis for solidification control of cast irons

Smelting of vanadium-containing alloys with using non-standard reducing agents

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