共析钢（eutectoid steel）：Wc=0.77% 过共析钢（hypereutectoid steel）：Wc=0.77～2.11% 含碳量在0.7%以上的共析钢和过共析钢，属于高碳钢，属工具钢类。
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hype-eutectoid steel 过共析钢
hot-worked hypo-eutectoid steel 热加工亚共析钢
hypo eutectoid steel 亚共析钢
eutectoid steel true steel 共析钢
eutectoid pearlite steel 共析珠光体钢
eutectoid rail steel 共析轨钢
Eutectoid steel is one kind of natural composite materials. The basic structure is made up of soft ferrite and hard cementite lamellar.
共析钢是天然的复合材料,其基体珠光体组织由较软的铁素体和较硬的渗碳体层片相间排列而成。
参考来源 - 共析钢室温冷拔变形机制研究·2,447,543篇论文数据，部分数据来源于NoteExpress
以上来源于: WordNet
The strength and tenacity of super-eutectoid steel wire have been improved notably by increasing the carbon content of the steel to more than 0.9% and controlling the heat-treatment system.
钢含磷量提高到0．9％以上，控制钢丝的热处理制度，使过共析钢丝强韧性显著提高。
To reheat hardened steel or hardened cast iron to some temperature below the eutectoid temperature for the purpose of decreasing hardness and increasing toughness.
重新加热硬化钢或硬化铸铁至某一温度，低于共析温度下，使硬度降低，韧度增加。
A simplified diagram, such as the one in Fig. 2.1, focuses on the eutectoid region and is quite useful in understanding the properties and processing of steel.
如图2.1所示的简化铁碳状态图将焦点集中在共析区，这对理解钢的性能和处理是十分有用的。
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