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单词 hypoeutectic
释义

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hypoeutectic
hypoeutectic adj.
Brit. /ˌhʌɪpə(ʊ)juːˈtɛktɪk/
,
U.S. /ˌhaɪpoʊˌjuˈtɛktɪk/
(of an alloy of iron) containing a lower proportion of carbon than the eutectic composition (i.e. less than about 4·3%; (in quot. 1902 for hypoacidity n. = hypoeutectoid adj., eutectoid (eutectoid adj.) itself not having been coined at that date).
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society > occupation and work > materials > derived or manufactured material > metal > alloy > [adjective] > of iron alloy: containing specific proportions
hypereutectic1902
hypoeutectic1902
1902 Encycl. Brit. XXIX. 572/2 They are called hyper-eutectic or hypo-eutectic according as this excess is cementite or ferrite, i.e., according as their carbon-content is above or below the 0·90 per cent. which the eutectic itself contains.
1926 W. E. Woodward Metallogr. Steel & Cast Iron i. 27 In a 2·0% C steel 0·3% C (= 4·5% Fe3C) will have been required to form the eutectic portion of the hypo-eutectic alloy.
1959 A. G. Guy Elem. Physical Metall. (ed. 2) vi. 186 As the composition changes from hypoeutectic (less than eutectic) to hypereutectic (more than eutectic) in terms of metal B, the primary crystals change from alpha phase to beta phase.
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