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US 2011/0297280 A1Published application
Ferritic spheroidal graphite cast iron
AssigneesToyota Jidosha Kabushiki Kaisha, Aisin Takaoka Co., Ltd.
InventorsYoshikazu Genma, Go Kuramoto, Yoshihiro Hibino, Zhong-zhi Zhang, Takeyuki Sakuma
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Abstract
Ferritic spheroidal graphite cast iron includes: 3.1 to 3.5 percent by mass of carbon; 4.1 to 4.5 percent by mass of silicon; 0.8 percent by mass or below of manganese; 0.1 to 0.6 percent by mass of molybdenum; 0.1 to 1.0 percent by mass of chromium; 0.03 to 0.1 percent by mass of phosphorus; 0.03 percent by mass or below of sulfur; 0.02 to 0.15 percent by mass of magnesium; and iron.
Claims12
A ferritic spheroidal graphite cast iron comprising:
- 3.1 to 3.5 percent by mass of carbon;
- 4.1 to 4.5 percent by mass of silicon;
- 0.8 percent by mass or below of manganese;
- 0.1 to 0.6 percent by mass of molybdenum;
- 0.1 to 1.0 percent by mass of chromium;
- 0.03 to 0.1 percent by mass of phosphorus;
- 0.03 percent by mass or below of sulfur;
- 0.02 to 0.15 percent by mass of magnesium;
- and
- iron.
7 more elements
A manufacturing method for ferritic spheroidal graphite cast iron, comprising:
- preparing raw material that includes carbon, silicon, manganese, molybdenum, chromium, phosphorus, sulfur, magnesium and iron;
- melting the raw material;
- applying graphite spheroidization by adding Fe—Si—Mg alloy to the melted raw material;
- inoculating the raw material, which has been subjected to the graphite spheroidization, using Fe—Si;
- and
- casting the inoculated raw material at 1400° C. or above, wherein
- the inoculated raw material includes 3.1 to 3.5 percent by mass of carbon, 4.1 to 4.5 percent by mass of silicon, 0.16 to 0.8 percent by mass of manganese, 0.1 to 0.6 percent by mass of molybdenum, 0.1 to 1.0 percent by mass of chromium, 0.03 to 0.1 percent by mass of phosphorus, 0.002 to 0.03 percent by mass of sulfur, and 0.02 to 0.15 percent by mass of magnesium.
4 more elements
Dependencies are inferred from the claim text.