Cast iron and steel - cast iron and steel

Japanese: 鋳鉄・鋳鋼 - ちゅうてつちゅうこう
Cast iron and steel - cast iron and steel
Cast iron refers to pig iron for pig casting or pig casting itself. It is an iron alloy containing 3.0-3.6% carbon, 1-2% silicon, 0.5-1.0% manganese, 0.3-1.0% phosphorus, and 0.06-0.1% sulfur, and is easy to cast and cut. Carbon exists as free graphite in addition to the components of pearlite and cementite in the base material. When cast iron is cooled rapidly, a large amount of cementite precipitates, and the microscopic structure turns white, resulting in a state known as white pig iron, but if the cooling rate is slowed down, the cementite decomposes into graphite and iron, and at room temperature it becomes ferrite and graphite.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:
鋳鉄cast ironとは銑鋳物(ずく鋳物)用の銑鉄または銑鋳物そのものをいう。炭素3.0~3.6%,ケイ素1~2%,マンガン0.5~1.0%,リン0.3~1.0%,硫黄0.06~0.1%を含む鉄合金で,鋳造しやすく,また切削加工しやすい材料である。炭素は素地のパーライト,セメンタイトの構成要素以外に遊離黒鉛として存在する。鋳鉄の組織は急冷するとセメンタイトが大量析出して,顕微鏡組織が白くなるので白銑と呼ばれる状態になるが,冷却速度が小さくなるとセメンタイトが黒鉛と鉄に分解して室温ではフェライトと黒鉛の状態となる。

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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