Process for manufacturing a cylindrical hollow body and...

Metal working – Method of mechanical manufacture – Process for making bearing or component thereof

Reexamination Certificate

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C029S898140, C029S03300H, C072S254000, C072S368000, C420S065000, C420S066000

Reexamination Certificate

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09983497

ABSTRACT:
Process for manufacturing cylindrical hollow bodies with a circular cross-section using solid rough material of corrosion-resistant, martensitic chromium steels. A remelting block is produced and a tube blank is made therefrom, the tube blank being formed into a tube at hot forming temperature by extrusion at a deformation ratio of at least 6. Hollow bodies are cut from the resultant tube.

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