Centrifugally cast tube of spheroidal graphite cast- iron...

Details Centrifugally cast tube of spheroidal graphite cast- iron... Centrifugally cast tube of spheroidal graphite cast- iron...

C - Chemistry, Metallurgy

21

D

148/11

C21D 5/06 (2006.01) C21D 9/08 (2006.01)

Patent

CA 1201366

"Centrifugally cast tube of spheroidal graphite east-iron and its method of manufacture." ABRIDGEMENT The cast tube (T) is subjected internally in a chill- mould (1) to the uniform spraying of water from 1000°C approximately to 350°C approximately. Then it is extracted from the chill-mould and in a furnace is sub- jected to isothermal bainitisation maintenance, after which it is cooled in the atmosphere to ambient tempera- ture. Without it being necessary to add expensive chilling elements, one thus obtains lightened tubes having very good mechanical properties and the ovalisa- tion of which remains acceptable. Figure 2.

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