Title:
ROLL FOR HOT-ROLLING APPARATUS AND PROCESS FOR PRODUCING SAME
Document Type and Number:
WIPO Patent Application WO/2011/151929
Kind Code:
A1
Abstract:
A roll suitable for use in hot-rolling apparatuses is provided at low cost, the roll comprising a roll base which has a high hardness and is less apt to suffer deformation damages such as dents and a coating film formed on the surface of the roll base by thermal spraying, the coating film having excellent adhesion, wear resistance, and steel-sheet-conveying properties. Also provided is a process for advantageously producing the roll. The surface of a roll base comprising a steel which contains 0.9-3.2 mass% Cr and has a carbon equivalent Ceq, defined by equation (1), of 0.45-1.65 mass% is coated by thermal spraying with a coating film constituted of a self-fluxing alloy containing hard ceramic particles. Thereafter, the coated roll base is subjected to fusing treatment in a non-oxidizing atmosphere to form a diffusion layer having a thickness of 30-200 µm between the coating film formed by thermal spraying and the roll base, and is then cooled or heat-treated. Thus, the roll base is made to have a hardness of 35-60 in terms of Shore hardness HS.
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Inventors:
HONG, Myong Soo (MunraeKoenyoung APT, #93-1,MunraeDong-3ga, Yeongdeungpo-G, Seoul 01, 1011601, KR)
ホン ミョンスー (11 ソウル市 ヨンドンポクムンレイドン ３ガ、 ９３－１、ムンレイコンヨンアパート Seoul, 1011601, KR)
YASUO, Noriyuki (13-4, Fukae-kitamachi 4-chome,,Higashinada-ku, Kobe-sh, Hyogo 13, 〒6580013, JP)
ホン ミョンスー (11 ソウル市 ヨンドンポクムンレイドン ３ガ、 ９３－１、ムンレイコンヨンアパート Seoul, 1011601, KR)
YASUO, Noriyuki (13-4, Fukae-kitamachi 4-chome,,Higashinada-ku, Kobe-sh, Hyogo 13, 〒6580013, JP)
Application Number:
JP2010/059577
Publication Date:
December 08, 2011
Filing Date:
May 31, 2010
Export Citation:
Assignee:
TOCALO CO., LTD. (13-4, Fukae-kitamachi 4-chome Higashinada-ku, Kobe-sh, Hyogo 13, 〒6580013, JP)
トーカロ株式会社 (〒13 兵庫県神戸市東灘区深江北町４丁目１３番４号 Hyogo, 〒6580013, JP)
HONG, Myong Soo (MunraeKoenyoung APT, #93-1,MunraeDong-3ga, Yeongdeungpo-G, Seoul 01, 1011601, KR)
ホン ミョンスー (11 ソウル市 ヨンドンポクムンレイドン ３ガ、 ９３－１、ムンレイコンヨンアパート Seoul, 1011601, KR)
トーカロ株式会社 (〒13 兵庫県神戸市東灘区深江北町４丁目１３番４号 Hyogo, 〒6580013, JP)
HONG, Myong Soo (MunraeKoenyoung APT, #93-1,MunraeDong-3ga, Yeongdeungpo-G, Seoul 01, 1011601, KR)
ホン ミョンスー (11 ソウル市 ヨンドンポクムンレイドン ３ガ、 ９３－１、ムンレイコンヨンアパート Seoul, 1011601, KR)
International Classes:
C23C4/06; B21C47/00; B21C47/06; C22C38/00; C22C38/22; C22C38/24; C23C4/10; C23C4/12; C23C4/18; C23C10/28; C23C26/00
Attorney, Agent or Firm:
OGAWA, Junzo et al. (Kobikikan Ginza Bldg, 8-9 Ginza 2-chome, Chuo-k, Tokyo 61, 〒1040061, JP)
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Claims:
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