Antioxidant agent and process for producing metallic material
View Patent ↗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.
1. An antioxidant agent to be applied to a surface of a metallic starting material, containing:
first glass frits having a viscosity of 2×10 2 to 10 6 dPa·s at 1200° C.;
second glass frits having a viscosity of 2×10 2 to 10 6 dPa·s at 700° C.;
potter's clay; and
at least one of bentonite and sepiolite,
wherein the antioxidant agent contains 6 to 30 weight parts of the potter's clay with respect to 100 weight parts of the first glass frits and not lower than 4 weight parts and lower than 9 weight parts of at least one of the bentonite and sepiolite with respect to 100 weight parts of first glass frits.
2. The antioxidant agent according to claim 1 , wherein
the antioxidant agent contains 4 to 20 weight parts of the second glass frits with respect to 100 weight parts of the first glass frits.
3. The antioxidant agent according to claim 1 , further containing an inorganic compound having a melting point of 400 to 600° C.
4. The antioxidant agent according to claim 3 , wherein
the inorganic compound is at least one of boric acid and boron oxide.
5. A process for producing a metallic material, comprising the steps of:
applying the antioxidant agent according to claim 1 to the surface of a metallic starting material; and
heating the metallic starting material to which the antioxidant agent has been applied.