Szczegóły publikacji
Opis bibliograficzny
Wytwarzanie spieków z proszku żelaza otrzymanego drogą bezpośredniej redukcji rudy żelaza jako przykład racjonalnego użytkowania surowców mineralnych — Production of sintered parts from iron powder obtained by direct reduction of iron ore – an example of sensible utilisation of natural resources / Katarzyna FARYJ, Andrzej CIAŚ // Gospodarka Surowcami Mineralnymi = Mineral Resources Management ; ISSN 0860-0953. — 2008 — t. 24 z. 3/3, s. 95–103. — Bibliogr. s. 102, Streszcz. Abstr. — III Krakowska konferencja młodych uczonych : pod patronatem JM Rektora Akademii Górniczo-Hutniczej im. Stanisława Staszica prof. dr. hab. inż. Antoniego Tajdusia : Kraków, 25–27 września 2008 / red. zeszytu: Michał Kopacz, Adam Szurlej ; Grupa Naukowa Pro Futuro, AGH Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. — Kraków : IGSMiE PAN, 2008
Autorzy (2)
Słowa kluczowe
Dane bibliometryczne
| ID BaDAP | 40815 |
|---|---|
| Data dodania do BaDAP | 2008-10-17 |
| Rok publikacji | 2008 |
| Typ publikacji | referat w czasopiśmie |
| Otwarty dostęp |  |
| Czasopismo/seria | Gospodarka Surowcami Mineralnymi - Mineral Resources Management |
Abstract
The present Iron Age, has its origins in the Mediterranean Civilization between 1000 and 700 BC. Sponge iron was obtained in natural-draught smelting furnaces as a sponge lump that was then reforged in order to produce the so-called puddling iron. Until 5c. BC, the process of obtaining steel was always conducted without transforming the alloy into the liquid phase. The reduced puddling iron and early puddled steels, being the alloys of iron containing carbon and phosphorus, were undoubtedly the prototypes of modern steels produced through the powder metallurgy technique consisting in sintering the reduced sponge iron powder. Thus, we can claim that sintered steels are historically older than the cast ones. Characteristic feature of the present civilization, although this historical phenomenon is relatively new, is the great scale of the metal alloys production. The annual world production exceeds one billion tons. About 400 million tons of steel, out of the annual 850 million, are obtained from the scrap recycling. The rest of it results from processing of 1100 million tons of iron ore. About 90% of crude iron appears in the form of the pig iron, and the remaining 10% is generated in the direct reduction process being carried out in the solid state (sponge iron). Before the development of the blast furnace, iron smelting was achieved by ore reduction at temperatures below the melting point of the metal, forming an agglomerated 'bloom' of low-carbon iron and slag. In the direct reduction process the iron oxides, in the form of ore or rolling scale, undergo the carbon or hydrogen reduction at temperatures lower than the iron melting point. Because of the fact that impurities cannot be removed into slag, only sufficiently pure materials are suitable for the reduction process. The sponge product is developed in the direct reduction process, and is further mechanically ground down for the powder metallurgy purposes. This type of iron powders resulting from reduction of the Swedish ore produced by Hoganas company has dominated the market. The present paper reviews research results on the formation process of the sintered manganese steel and focus on the application of such an iron powder. In addition to NC 100.24 reduced iron powder the steel contains 3% manganese and 0.8% carbon.
