V2EX cementite

Cementite

释义 Definition

cementite(渗碳体/碳化铁)指钢和铸铁中常见的一种硬而脆的化合物相,化学式为 FeC。它会显著影响材料的硬度、耐磨性与脆性。(在冶金语境中最常用;该词也可在更广义上指“胶结物”,但较少见。)

发音 Pronunciation

/smn.tat/

例句 Examples

Cementite makes the steel harder but more brittle.
渗碳体会让钢更硬,但也更脆。

During slow cooling, pearlite forms as alternating layers of ferrite and cementite, which changes the material’s strength and toughness.
在缓慢冷却过程中,珠光体会形成由铁素体与渗碳体交替层组成的组织,从而改变材料的强度与韧性。

词源 Etymology

cementite 源自 cement(“胶结、黏合”之意,来自拉丁语 cementum)加上矿物学常见后缀 -ite(“某种矿物/物质”)。在金属学里,该词用来命名一种“像胶结物一样”出现在组织中的硬质相即 FeC(碳化铁)

相关词 Related Words

文学与著作 Literary Works

  • 《The Metallography of Steel and Cast Iron》(Henry Marion Howe)讨论钢与铸铁的显微组织时常涉及 cementite
  • 《Physical Metallurgy Principles》(Robert E. Reed-Hill 等)在相图与组织演变章节中频繁使用 cementite
  • 《Metallurgy for the Non-Metallurgist》(Arthur C. Reardon)以较通俗方式介绍钢的组织(含 cementite)与性能关系。
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