Influence of Vanadium Content on Continuous Cooling Transformation Behavior of Multi-component White Cast Iron
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Accession number;05A0443663
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| Title;Influence of Vanadium Content on Continuous Cooling Transformation Behavior of Multi-component White Cast Iron |
| Author;
YOKOMIZO YUZO
(Kawaraseikosho)
SASAGURI NOBUYA
(Kurume National Coll. Technol., JPN)
NANJO KIYOSHI
(Kurume National Coll. Technol., JPN)
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.5;PAGE.301-307(2005)
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| Figure&Table&Reference;FIG.8, TBL.1, REF.12 |
| Pub. Country;Japan |
| Language;Japanese |
| Abstract;Influence of V content in multi-component white cast iron, which contains 5 mass% main alloying elements of Cr, Mo, W, each and 2 mass% of C and Co, on continuous cooling transformation behavior was investigated by varying the V content from 3 mass% to 9 mass%. The austenitizing temperatures used in this experiment were 1273 K and 1373 K. In the irons with up to 7 mass%V, both pearlite and bainite transformations appeared in CCT diagram, but in the iron with 9 mass%V, only transformation of ferrite precipitation was seen. The critical cooling rate of pearlite transformation (VC-P) decreased from 0.56 K/s to 0.11 K/s at 1273K austenitization and from 0.43 K/s to 0.06 K/s at 1373 K austenitization respectively, as the V content increased up to 7 mass%. The critical cooling rate of bainite transformation (VC-B) decreased with an increase in V content up to 4 mass%, but it increased over 4 mass%V. Though the Ms temperature did not change much between the irons with 3 mass%V and 4 mass%V, it gradually rose with an increase in the V content over 4 mass%, regardless of the austenitizing temperature. Mf temperature appeared first in the 5 mass%V iron at 1273K austenitization and in the 7 mass%V iron at 1373K austenitization, respectively, and then it rose corresponding to the increase of the V content. The highest macro-hardness of transformed specimen increased once and then gradually decreased as the V content increased. The V content at the maximum hardness was about 5 mass%. (author abst.) |
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