Molds for continuously casting steel
AssigneesSumitomo Metal Industries, Ltd., Satosen Co., Ltd.
InventorsSenri Hara, Hiroshi Tomono, Tomohiko Kimura, Kunio Inoue, Takayuki Sato, Yoshio Okada
Life of this patent
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Abstract
A mold of copper or copper alloy for continuously casting steel comprises a rough inner surface, a plating of nickel, cobalt or alloy thereof formed over the inner surface and a chromium plating formed over said plating. The mold has a prolonged mold life, gives steel slabs with improved qualities and reduces amounts of lubricating material used in the molding operation.
Claims20
A mold of copper or copper alloy for continuously casting steel made by the method comprising
- providing a roughened initial surface of a copper or copper alloy mold,
- plating a first coating of nickel, cobalt or alloy thereof over the roughened initial surface thereof,
- plating a second coating of chromium over the first coating, whereby a mold is formed having a rough inner surface corresponding to the roughness of said initial surface.
A mold of copper or copper alloy for continuously casting steel made by the method comprising
- providing a roughened initial surface of a copper or copper alloy mold,
- plating a first coating of nickel, cobalt or alloy thereof over the roughened initial surface, and
- plating a second coating of an alloy selected from the group consisting of alloys of
- (a) 3 to 20% by weight phosphorous and, as the balance, nickel,
- (b) 3 to 20% by weight phosphorous and, as the balance, cobalt,
- (c) 3 to 20% by weight phosphorous and, as the balance, nickel and cobalt,
- (d) 2 to 15% by weight boron and, as the balance, nickel,
- (e) 2 to 15% by weight boron and, as the balance, cobalt,
- (f) 2 to 15% by weight boron and, as the balance, nickel and cobalt,
- (g) 3 to 20% by weight phosphorous, 2 to 15% by weight boron and, as the balance, nickel,
- (h) 3 to 20% by weight phosphorous, 2 to 15% by weight boron and, as the balance, cobalt, and
- (i) 3 to 20% by weight phosphorous, 2 to 15% by weight boron and, as the balance, nickel and cobalt, over the first coating,
- whereby a mold is formed having a rough inner surface corresponding to the roughness of said initial surface.
A mold of copper or copper alloy for continuously casting steel made by the method comprising
- providing a roughened initial surface of a copper or copper alloy mold,
- plating a first coating of nickel, cobalt or alloy thereof over the roughened initial surface,
- plating a second coating of an alloy selected from the group consisting of alloys of
- (a) 3 to 20% by weight phosphorous and, as the balance, nickel,
- (b) 3 to 20% by weight phosphorous and, as the balance, cobalt,
- (c) 3 to 20% by weight phosphorous and, as the balance, nickel and cobalt,
- (d) 2 to 15% by weight boron and, as the balance, nickel,
- (e) 2 to 15% by weight boron and, as the balance, cobalt,
- (f) 2 to 15% by weight boron and, as the balance, nickel and cobalt,
- (g) 3 to 20% by weight phosphorous, 2 to 15% by weight boron and, as the balance, nickel,
- (h) 3 to 20% by weight phosphorous, 2 to 15% by weight boron and, as the balance, cobalt, and
- (i) 3 to 20% by weight phosphorous, 2 to 15% by weight boron and, as the balance, nickel and cobalt, over the first coating, and
- plating a third coating of chromium over the second coating,
- whereby a mold is formed having a rough inner surface corresponding to the roughness of said initial surface.
A mold of copper or copper alloy for continuously casting steel made by the method comprising
- providing a roughened initial surface of a copper or copper alloy mold,
- plating a first coating of nickel, cobalt or alloy thereof over the roughened initial surface,
- plating a second coating of an alloy selected from the group consisting of alloys of
- (a) 3 to 20% by weight phosphorous and, as the balance, nickel,
- (b) 3 to 20% by weight phosphorous and, as the balance, cobalt,
- (c) 3 to 20% by weight phosphorous and, as the balance, nickel and cobalt,
- (d) 2 to 15% by weight boron and, as the balance, nickel,
- (e) 2 to 15% by weight boron and, as the balance, cobalt,
- (f) 2 to 15% by weight boron and, as the balance, nickel and cobalt,
- (g) 3 to 20% by weight phosphorous, 2 to 15% by weight boron and, as the balance, nickel,
- (h) 3 to 20% by weight phosphorous, 2 to 15% by weight boron and, as the balance, cobalt, and
- (i) 3 to 20% by weight phosphorous, 2 to 15% by weight boron and, as the balance, nickel and cobalt, over the first coating, and
- oxidizing an uppermost layer of the second coating to form an oxidized layer,
- whereby a mold is formed having a rough inner surface corresponding to the roughness of said initial surface.
Dependencies are inferred from the claim text.