Crystallization Behavior of Carbides in Hypereutectic Multi-component White Cast Iron with High Carbon Content
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Accession number;05A0799000
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| Title;Crystallization Behavior of Carbides in Hypereutectic Multi-component White Cast Iron with High Carbon Content |
| Author;
SASAGURI NOBUYA
(Kurume National Coll. Technol., JPN)
YOKOMIZO YUZO
(Kawaraseikosho)
MUTAGUCHI TATSUYA
(Kawaraseikosho)
HASHIMOTO MITSUO
(Fujiko)
MATSUBARA YASUHIRO
(Kurume National Coll. Technol., JPN)
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Journal Title;Journal of Japan Foundry Engineering Society
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Journal Code:G0096A
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ISSN:1342-0429
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VOL.77;NO.9;PAGE.629-636(2005)
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| Figure&Table&Reference;FIG.12, TBL.3, REF.13 |
| Pub. Country;Japan |
| Language;Japanese |
| Abstract;The solidification sequences of three kinds of hypereutectic multi-component white cast irons with 4 to 5 mass% C were clarified for a basic study to apply them to a welding deposit material in the hard facing technique. To reveal the phases crystallized from liquid, quench tests during thermal analysis were introduced into this experiment. In the case of Fe-5% (Cr, V, Mo, W, each)-4-5% C irons, four types of carbides, MC, M2C, M7C3 and M3C were found to exist in the matrix. In the iron with 4% C, MC carbide precipitates as a primary phase, and austenite as a quasi-primary phase. After the precipitation of the two different primary phases, L.RAR..GAMMA.+MC eutectic reaction takes place, followed by L.RAR..GAMMA.+M7C3 eutectic reaction. Next, L.RAR..GAMMA.+M3C eutectic reaction continues and solidification completes with L.RAR..GAMMA.+M2C eutectic reaction. The solidification sequence of the iron with 5% C is as follows: L0.RAR.Primary MC+L1, L1.RAR.quasi-primary M7C3+L2, L2.RAR.(.GAMMA.+M7C3) eutectic+L3, L3.RAR.(.GAMMA.+M3C) eutectic+L4, and finally L5.RAR.(.GAMMA.+M2C) eutectic. In the case of Fe-5% (Cr, V, each)-2% (Mo, W, each)-4% C iron, .GAMMA., MC, M7C3 and M3C exist in the matrix. The following solidification sequence was revealed: L0.RAR.Primary MC+L1, L1.RAR.(.GAMMA.+MC) eutectic+L2, L2.RAR.(.GAMMA.+M7C3) eutectic+L3, and finally L3.RAR.(.GAMMA.+M3C) eutectic. (author abst.) |
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