Method for applying lubricant onto mandrel bar, method for...

Details Method for applying lubricant onto mandrel bar, method for... Method for applying lubricant onto mandrel bar, method for...

2011-01-04

2011-01-04

Tolan, Edward (Department: 3725)

Metal deforming

With cleaning, descaling, or lubrication of work or product

Lubricating

C072S208000, C072S236000

Reexamination Certificate

active

07861565

ABSTRACT:
In applying a non-graphite-based lubricant composed of, by mass %, 10 to 70% of an oxide-based lamellar compound and 30 to 90% of boric acid onto a mandrel bar, the lubricant film thickness is set from a predetermined master curve for the lubricant film thickness corresponding to an amount of mica. This stably produces a seamless steel pipe of high quality, while preventing seizing marks and internal flaws.

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International Search Report dated Apr. 1, 2008 in corresponding PCT/JP2007/075119 (English and Japanese versions).
Written Opinion Apr. 1, 2008 in corresponding PCT/JP2007/075119 (Japanese only).
International Preliminary Examination Report in corresponding PCT/JP/2007/075119 dated Jul. 7, 2009.
English Translation of Written Opinion of Apr. 1, 2008.

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