The spheroidal graphite cast iron contains at least 1.0 to 2.5wt% Ni and is so formed that the surface layer when placed in the as-cast state is the base structure mainly composed of the ferrite and that the internal base has higher pearlite area rate than that of the surface layer.例文帳に追加

本発明の球状黒鉛鋳鉄部材は、１．０〜２．５重量％のＮｉを少なくとも含み、鋳放し状態に置いて表面層がフェライト主体の基地組織で内部の基地が表面層よりもパーライト面積率が高いこととした。 - 特許庁

The invention has been realized by finding the fact that a ferritic casting which is soft and has high ductility, though it is a thin ductile cast iron product which is not chilled, can be produced by increasing the content of sulfur which has been heretofore considered as a substance blocking the production of spheroidal graphite to some extent, and further reducing a cooling rate.例文帳に追加

従来は球状黒鉛の生成を阻害する物質であると考えられていたサルファの含有量をある程度増やすと共に、冷却速度を低く抑えることにより、薄肉のダクタイル鋳鉄製品であってもチル化させることなく、柔らかく、延性の大きいフェライト地の鋳物を製造することができることを見出し、本発明に至った。 - 特許庁

To provide a spheroidal graphite cast iron member whose surface layer is a structure mainly composed of ferrite in an as-cast state, and whose inside is composed of a structure having a pearlite area rate higher than that of the surface layer and which is strong to a notch effect, has high elongation and impact value and high tensile strength even when the member is not separately subjected to a heat treatment.例文帳に追加

鋳放し状態において表面層がフェライト主体の組織であり、内部が表面層よりもパーライト面積率の高い組織とし、別途熱処理を行うことなく、切り欠き効果に対して強く、かつ伸びや衝撃値が高く、引張強さが高い球状黒鉛鋳鉄部材を提供すること。 - 特許庁