Nippon Steel Sumitomo Metal Corporation

Sumitomo Metal Industries, Inc.

Shuichi Akiyama

Kazuhiro Shimoda

Tomio Yamakawa

Yasuyoshi Hidaka

Keishi Matsumoto

Takahisa Kato

Kenji Takeuchi

Yuji Inoue

Hirokazu Okada

Sumio Iida

Kazutaka Asabe

Naoya Hirase

Koji Muramatsu

Junichi Nishimori

The present invention provides a lubricant composition for hot metal working which is capable of inhibiting generation of flaws on the surface of materials to be provided for hot metal working, and provides a method of hot metal working. The invention provides a lubricant composition for hot metal working comprising a plurality of glass frits respectively having different softening point from each other.

Lubricant composition for hot metal working and method of hot metal working using the same

There is provided an antioxidant agent capable of preventing scale from being produced on the surface of a heated metallic starting material more effectively than the conventional antioxidant agent. The antioxidant agent according to the present invention contains a plurality of glass frits having different softening points and an inorganic compound having a melting point not higher than 600&#xb0; C. The inorganic compound mainly softens in the low-temperature range of about 600&#xb0; C. The plurality of glass frits mainly soften in the low-temperature range of about 600 to 1300&#xb0; C. Therefore, the antioxidant agent covers the surface of metallic starting material in a broad temperature range, oxidizes the surface of metallic starting material, and prevents the production of scale.

Antioxidant agent and process for producing metallic material

There is provided an antioxidant agent excellent in anti-dripping property and anti-peeling property. The antioxidant agent in accordance with the present invention contains a plurality of glass frits having different softening points, potter's clay, and bentonite and/or sepiolite. On account of the potter's clay, the antioxidant agent applied to the surface of a metallic starting material is less liable to drip down. Further, on account of the bentonite and/or sepiolite, the antioxidant agent is less liable to peel off the surface of the metallic starting material.

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Osaka, Japan

Shuichi Akiyama