Title:
LUBRICANT FOR HOT-ROLLING TOOLS, AND METHOD FOR SURFACE TREATMENT OF MANDREL BAR FOR USE IN PRODUCING SEAMLESS PIPE BY HOT ROLLING
Document Type and Number:
WIPO Patent Application WO/2011/099304
Kind Code:
A1
Abstract:
A lubricant for hot-rolling tools which is prepared by dispersing and dissolving an oxide-type layer compound (such as potassium tetrasilicate mica, sodium tetrasilicate mica, vermiculite or bentonite), a boric acid compound (such as boric acid, potassium borate, or sodium borate), and graphite in water, wherein the content ratio of the oxide-type layer compound to the boric acid compound is 10:90 to 70:30 by mass, and the graphite content is 1.0 to 4.5%. In rolling with a mandrel mill, the lubricant is applied to the surface of a mandrel bar to form a lubricating film on the surface thereof. Thus, the lubricant exhibits excellent anti-seizure properties, while no lubricant residue remains on the inside surface of the resulting pipe.
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Inventors:
SAITOU, Kenichi (5-33, Kitahama 4-chome, Chuo-ku, Osaka-sh, Osaka 41, 〒5410041, JP)
Application Number:
JP2011/000789
Publication Date:
August 18, 2011
Filing Date:
February 14, 2011
Export Citation:
Assignee:
SUMITOMO METAL INDUSTRIES, LTD. (5-33, Kitahama 4-chome Chuo-ku, Osaka-sh, Osaka 41, 〒5410041, JP)
住友金属工業株式会社 (〒41 大阪府大阪市中央区北浜四丁目５番３３号 Osaka, 〒5410041, JP)
住友金属工業株式会社 (〒41 大阪府大阪市中央区北浜四丁目５番３３号 Osaka, 〒5410041, JP)
International Classes:
C10M173/02; B21B25/04; C10M125/02; C10M125/26; C10M125/30; C10N30/00; C10N30/06; C10N40/24
Attorney, Agent or Firm:
MORI, Michio et al. (M. MORI PATENT OFFICE, 17-23 Higashinaniwa-cho 5-chom, Amagasaki-shi Hyogo 92, 〒6600892, JP)
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