Cast iron member manufacturing method

Details Cast iron member manufacturing method Cast iron member manufacturing method

2008-04-08

2008-04-08

Yee, Deborah (Department: 1793)

Alloys or metallic compositions

Ferrous

1.7 percent or more carbon containing

C148S612000, C148S545000

Reexamination Certificate

active

07354549

ABSTRACT:
A nitrogen trapping agent is added by a metering hopper to raw materials, which are melted and poured into a mold cavity of a metal mold device (18). The molten metal is then cooled and solidified into a casting (B). Before the molten metal is fully cooled and solidified, free nitrogen present in the molten metal is quickly trapped by the nitrogen trapping agent, producing a nitride. Then, a chilled structure generated in the surface layer of the casting (B) is decomposed by heating the casting (B). Finally, the heated casting (B) is machined into a camshaft (A) which is a cast iron member as a final product.

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