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Titolo:
In situ formation of TiC particulate composite layer on cast iron by laseralloying of thermal sprayed titanium coating
Autore:
Park, HI; Nakata, K; Tomida, S;
Indirizzi:
Pukyong Natl Univ, Dept Prod & Joining Eng, Pusan 608739, South Korea Pukyong Natl Univ Pusan South Korea 608739 ng, Pusan 608739, South Korea Osaka Univ, Joining & Welding Res Inst, Ibaraki, Osaka 567, Japan Osaka Univ Ibaraki Osaka Japan 567 ng Res Inst, Ibaraki, Osaka 567, Japan Toyama Ind Technol Ctr, Takaoka, Toyama 933, Japan Toyama Ind Technol CtrTakaoka Toyama Japan 933 akaoka, Toyama 933, Japan
Titolo Testata:
JOURNAL OF MATERIALS SCIENCE
fascicolo: 3, volume: 35, anno: 2000,
pagine: 747 - 755
SICI:
0022-2461(200002)35:3<747:ISFOTP>2.0.ZU;2-H
Fonte:
ISI
Lingua:
ENG
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Engineering, Computing & Technology
--discip_EC--
Citazioni:
21
Recensione:
Indirizzi per estratti:
Indirizzo: Park, HI Pukyong Natl Univ, Dept Prod & Joining Eng, Pusan 608739, South Korea Pukyong Natl Univ Pusan South Korea 608739 608739, South Korea
Citazione:
H.I. Park et al., "In situ formation of TiC particulate composite layer on cast iron by laseralloying of thermal sprayed titanium coating", J MATER SCI, 35(3), 2000, pp. 747-755

Abstract

Commercial flake graphite cast iron substrate was coated with titanium powder by low pressure plasma spraying and was irradiated with a CO2 laser to produce the wear resistant composite layer. The macro and microstructural changes of an alloyed layer with the traveling speeds of laser beam, the precipitate morphology of TiC particulate and the hardness profile of the alloyed layer was examined. From the results, it was possible to composite TiC particulate on the surface layer by direct reaction between carbon existed in the cast iron matrix and titanium with thermal sprayed coating by remelting and alloying them using laser irradiation. The cooling rate of the laser remelted cast iron substrate without a titanium coating was about 1 x 10(4) K/s to 1 x 10(5) K/s in the order under the condition of this study. Themicrostructure of the alloyed layer consisted of three zones; the TiC particulate precipitate zone (MHV 400-500), the mixed zone of TiC particulate ledeburite (MHV 650-900) and the ledeburite zone (MHV 500-700). TiC particulates were precipitated as a typical dendritic morphology. The secondary TiC dendrite arms were grown to a polygonized shape and were necking. Then the separated arms became cubic crystal of TiC at the slowly solidified zone. In the rapidly solidified zone near the fusion boundary, however the finegranular TiC particulates were grouped like grapes. (C) 2000 Kluwer Academic Publishers.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 04/07/20 alle ore 05:04:55