发明公开
EP0303205A2 Ceramic dull roll for rolling mill and method of producing the same
失效
在轧钢机和它们的制备方法的陶瓷辊消光的表面。
- 专利标题: Ceramic dull roll for rolling mill and method of producing the same
- 专利标题(中): 在轧钢机和它们的制备方法的陶瓷辊消光的表面。
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申请号: EP88112823.5申请日: 1988-08-05
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公开(公告)号: EP0303205A2公开(公告)日: 1989-02-15
- 发明人: Nakagawa, Mitsuo , Taguchi, Mituo , Sobue, Masahisa
- 申请人: HITACHI, LTD.
- 申请人地址: 6, Kanda Surugadai 4-chome Chiyoda-ku, Tokyo 100 JP
- 专利权人: HITACHI, LTD.
- 当前专利权人: HITACHI, LTD.
- 当前专利权人地址: 6, Kanda Surugadai 4-chome Chiyoda-ku, Tokyo 100 JP
- 代理机构: Strehl Schübel-Hopf Groening & Partner
- 优先权: JP199789/87 19870812
- 主分类号: B21B27/00
- IPC分类号: B21B27/00 ; C04B35/10 ; C04B35/48 ; C04B35/56 ; C04B35/58
摘要:
A sintered ceramic dull roll for rolling mill essentially consists of 80 to 50 vol% of a first ingredient such as SiC, Si₃N₄, sialon, Al₂O₃ and ZrO₂ and 20 to 50 vol% of second ingredient such as the carbides, nitrides and borides of transition elements of the groups IVa, Va and VIa of the periodic table, and has a density of not less than 96% of theoretical density, the first and second ingredients are so selected that the difference in the Young's modulus between the first and second ingredients is not more than 2 x 10⁶ bar, the amount of the second ingredient is further so selected that the electric resistivity of the sintered ceramic dull roll is not more than 1 x 10⁻² Ωcm and the surface of the roll has a uniform surface roughness of not less than 6 µm, whereby the sintered ceramic dull roll has a long life.
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