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cementite |
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cementite [si′men‚tīt] (metallurgy) Fe3C A hard, brittle, crystalline compound occurring as lamellae or plates in steel. Also known as iron carbide. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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| In high-temperature annealing, a casting is heated above the critical range to a temperature (1,650-1,750F/900-950C) at which both primary carbides and free cementite decompose to ferrite and graphite. In the absence of enough Mn, S has a marked stabilizing action on the cementite and promotes carbides (chill). In addition, the ferrite effect suppresses cementite formation and inhibits chills; |
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