Hyper-eutectoid steel

Japanese: hyper-eutectoid steel(英語表記)hypereutectoidsteel
Hyper-eutectoid steel

...As a result, the microstructure at room temperature is either pro-eutectoid ferrite and pearlite or pro-eutectoid cementite and pearlite. The former is called hypo-eutectoid steel, and the latter is called hyper-eutectoid steel.
[Transformation curve]
A diagram showing the types and amounts of phases produced during heat treatment versus time and temperature is called a transformation curve.

*Some of the terminology that refers to "hyper-eutectoid steel" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…この結果,常温での組織は,初析のフェライトとパーライトまたは初析のセメンタイトとパーライトとなる。前者を亜共析鋼hypo‐eutectoid steel,後者を過共析鋼hyper‐eutectoid steelという。
[変態曲線]
 熱処理において生成する相の種類とその量を時間軸と温度軸に対して示した図を変態曲線という。…

※「hyper-eutectoid steel」について言及している用語解説の一部を掲載しています。

出典|株式会社平凡社世界大百科事典 第2版について | 情報

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