Advanced processing for recycling of iron scrap with impurities

• Autorzy: Osawa Y. , Takamori S. , Minagawa K. , Kakisawa H. , Halada K.
• Konferencja: Proceedings of the 2nd Polish-Japanese Workshop on Materials Science "Materials for Sustainable Development in the 21st Century" 12-15 October 2005, Warsaw, Poland
• Języki publikacji: EN

Abstrakty

EN

The present research focuses on the recycling of steel in combination with copper or aluminum alloys. To use iron scrap with a copper content in the range of 0.5 to 15%, a water atomization process was carried out, producing a rapidly solidified powder with copper of nano-order size dispersed in it. The powder was then hot rolled in the 600°C to 1000°C temperature region, where there is no liquid phase of copper, to produce a solid body. The solid bodies obtained presented a porosity of less than 1% for all the values of temperature and copper concentration, and it was established that the proposed process can be used for a wide range of concentrations of metallic impurities. The tensile strength increased with the copper content for all the temperatures, reaching stability at a copper concentration over 5%. Rapidly solidified powder was annealed and compacted at 600°C, resulting in a reduction of strength compared to non-annealed powder. The microstructure with a finely dispersed copper content seemed to have a considerable effect on the tensile strength of the compacted bodies. In the case of the use of aluminum-containing iron scrap, the results show that addition of aluminum to cast iron increased the resistance to abrasion, the high temperature oxidation characteristics, and the vibration control characteristics. When this cast iron was kept in air at temperatures ranging from 800°C to 1000°C, it was observed that the graphite on the surface was substituted by alumina.

Słowa kluczowe

EN

recycling; steel scrap; copper; aluminum; powder metallurgy; cast iron

• Wydawca: Institute of Nuclear Chemistry and Technology
• Czasopismo: Nukleonika
• Rocznik: 2006
• Tom: Vol. 51,suppl.1
• Strony: 113--119
• Opis fizyczny: Bibliogr. 8 poz., rys.

Twórcy

autor

Osawa Y.

autor

Takamori S.

autor

Minagawa K.

autor

Kakisawa H.

autor

Halada K.

• National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047, Japan, Tel.: [phone], Fax: [phone],

Bibliografia

• 1. Asano H (2001) Aluminum and its recycling problems.Met Technol 71:67−71
• 2. Kakisawa H, Minagawa K, Halada K (2003) Tensile behavior change depending on the microstructure of an Fe-Cu alloy produced from rapidly solidified powder.Mater Sci Eng A 340:175−180
• 3. Kakisawa H, Minagawa K, Ohtaguchi M, Halada K(2002) Deformation and fracture mechanism of consolidated Fe-Cu alloy from rapid solidified powder.Mater Trans, JIM 66:301−306
• 4. Koike K, Inami K, Itou T, Tateno M (1998) Recycling of steel can scraps for flake graphite cast iron. Report of Tochigi Pref Kougyou Gijutu Center 14:23−28
• 5. Minagawa K, Kakisawa H, Ohtaguchi M, Halada K(2002) New processing for recycling of iron scrap by consolidation of Fe-Cu alloy rapid solidified powder. J Adv Sci 13:336−339
• 6. Takamori S, Kimura T, Osawa Y (2002) Structure and wear properties of aluminum alloyed gray cast iron. J JFS 74:3−8
• 7. Takamori S, Osawa Y, Halada K (2002) Aluminumalloyed cast iron as a versatile alloy. Mater Trans, JIM 66:311−314
• 8.Tyuzou gijutsukouza hensyuiinkai (ed) (1967) Tokusyu tyutetu imono. Nikkan kougyou sinbunsya, p 169