Title:
CENTRIFUGALLY CAST EXTERNAL LAYER FOR ROLLING ROLL AND METHOD FOR MANUFACTURE THEREOF
Document Type and Number:
WIPO Patent Application WO/2006/030795
Kind Code:
A1
Abstract:
An external layer for a rolling roll having a structure containing 20 to 60 area % of an MC carbide dispersed therein is produced by a method comprising subjecting a molten metal having a chemical composition, in mass %, C: 2.2 to 6.0 %, Si: 0.1 to 3.5 %, Mn: 0.1 to 3.5 %, V: 8 to 22% and the balance: Fe and inevitable impurities to centrifugal casting, to manufacture a cylindrical article comprising an inner circumference layer having a concentrated MC carbide, an outer circumference layer having a lean MC carbide and a graded carbide concentration layer having a varying area percentage of an MC carbide between the above inner circumference layer and the above outer circumference layer, and then cutting off the above cylindrical article until the depth where the area % of a MC carbide is 20 % or more.
Inventors:
Furushima, Kiyoshi c/o Hitachi Metals Wakamatsu Ltd. (9-1, Kitahama 1-chome, Wakamatsu-k, Kitakyushu-shi Fukuoka 23, 80800, JP)
Matsumoto, Shunji c/o Hitachi Metals Wakamatsu Ltd. (9-1, Kitahama 1-chome, Wakamatsu-k, Kitakyushu-shi Fukuoka 23, 80800, JP)
Honda, Ryota c/o Hitachi Metals Wakamatsu Ltd. (9-1, Kitahama 1-chome, Wakamatsu-k, Kitakyushu-shi Fukuoka 23, 80800, JP)
Hayashi, Kiyoshi c/o Hitachi Metals Wakamatsu Ltd. (9-1, Kitahama 1-chome, Wakamatsu-k, Kitakyushu-shi Fukuoka 23, 80800, JP)
Honda, Takashi c/o Hitachi Metals Wakamatsu Ltd. (9-1, Kitahama 1-chome, Wakamatsu-k, Kitakyushu-shi Fukuoka 23, 80800, JP)
Uchida, Masatsugu c/o Hitachi Metals Wakamatsu Ltd. (9-1, Kitahama 1-chome, Wakamatsu-k, Kitakyushu-shi Fukuoka 23, 80800, JP)
Matsumoto, Shunji c/o Hitachi Metals Wakamatsu Ltd. (9-1, Kitahama 1-chome, Wakamatsu-k, Kitakyushu-shi Fukuoka 23, 80800, JP)
Honda, Ryota c/o Hitachi Metals Wakamatsu Ltd. (9-1, Kitahama 1-chome, Wakamatsu-k, Kitakyushu-shi Fukuoka 23, 80800, JP)
Hayashi, Kiyoshi c/o Hitachi Metals Wakamatsu Ltd. (9-1, Kitahama 1-chome, Wakamatsu-k, Kitakyushu-shi Fukuoka 23, 80800, JP)
Honda, Takashi c/o Hitachi Metals Wakamatsu Ltd. (9-1, Kitahama 1-chome, Wakamatsu-k, Kitakyushu-shi Fukuoka 23, 80800, JP)
Uchida, Masatsugu c/o Hitachi Metals Wakamatsu Ltd. (9-1, Kitahama 1-chome, Wakamatsu-k, Kitakyushu-shi Fukuoka 23, 80800, JP)
Application Number:
PCT/JP2005/016859
Publication Date:
March 23, 2006
Filing Date:
September 13, 2005
Export Citation:
Assignee:
HITACHI METALS, LTD. (2-1 Shibaura 1-chome, Minato-ku, Tokyo 14, 10586, JP)
Furushima, Kiyoshi c/o Hitachi Metals Wakamatsu Ltd. (9-1, Kitahama 1-chome, Wakamatsu-k, Kitakyushu-shi Fukuoka 23, 80800, JP)
Matsumoto, Shunji c/o Hitachi Metals Wakamatsu Ltd. (9-1, Kitahama 1-chome, Wakamatsu-k, Kitakyushu-shi Fukuoka 23, 80800, JP)
Honda, Ryota c/o Hitachi Metals Wakamatsu Ltd. (9-1, Kitahama 1-chome, Wakamatsu-k, Kitakyushu-shi Fukuoka 23, 80800, JP)
Hayashi, Kiyoshi c/o Hitachi Metals Wakamatsu Ltd. (9-1, Kitahama 1-chome, Wakamatsu-k, Kitakyushu-shi Fukuoka 23, 80800, JP)
Honda, Takashi c/o Hitachi Metals Wakamatsu Ltd. (9-1, Kitahama 1-chome, Wakamatsu-k, Kitakyushu-shi Fukuoka 23, 80800, JP)
Uchida, Masatsugu c/o Hitachi Metals Wakamatsu Ltd. (9-1, Kitahama 1-chome, Wakamatsu-k, Kitakyushu-shi Fukuoka 23, 80800, JP)
Furushima, Kiyoshi c/o Hitachi Metals Wakamatsu Ltd. (9-1, Kitahama 1-chome, Wakamatsu-k, Kitakyushu-shi Fukuoka 23, 80800, JP)
Matsumoto, Shunji c/o Hitachi Metals Wakamatsu Ltd. (9-1, Kitahama 1-chome, Wakamatsu-k, Kitakyushu-shi Fukuoka 23, 80800, JP)
Honda, Ryota c/o Hitachi Metals Wakamatsu Ltd. (9-1, Kitahama 1-chome, Wakamatsu-k, Kitakyushu-shi Fukuoka 23, 80800, JP)
Hayashi, Kiyoshi c/o Hitachi Metals Wakamatsu Ltd. (9-1, Kitahama 1-chome, Wakamatsu-k, Kitakyushu-shi Fukuoka 23, 80800, JP)
Honda, Takashi c/o Hitachi Metals Wakamatsu Ltd. (9-1, Kitahama 1-chome, Wakamatsu-k, Kitakyushu-shi Fukuoka 23, 80800, JP)
Uchida, Masatsugu c/o Hitachi Metals Wakamatsu Ltd. (9-1, Kitahama 1-chome, Wakamatsu-k, Kitakyushu-shi Fukuoka 23, 80800, JP)
International Classes:
C22C37/00; B21B27/00; B21B27/02; B22D13/02; B22D19/16; C22C37/06; F16C13/00
Attorney, Agent or Firm:
Takaishi, Kitsuma (Kagurazaka FN Bldg. 5F, 67 Kagurazaka 6-chom, Shinjuku-ku Tokyo 25, 16208, JP)
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