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Title:
CEMENTED CARBIDE, METHOD FOR PRODUCING SAME AND ROLLING MILL ROLL
Document Type and Number:
WIPO Patent Application WO/2018/025848
Kind Code:
A1
Abstract:
A cemented carbide which contains 55-90 parts by mass of WC particles and 10-45 parts by mass of a binder phase that is mainly composed of Fe, and wherein the binder phase has a composition that contains 2.5-10% by mass of Ni, 0.2-1.2% by mass of C, 0.5-5% by mass of Cr, 0.2-2.0% by mass of Si, 0.1-3% by mass of W, 0-5% by mass of Co and 0-1% by mass of Mn, with the balance being substantially made up of Fe and unavoidable impurities. This cemented carbide does not substantially contain a double carbide having a length of 5 μm or more. This cemented carbide is produced by being cooled from 900°C to 600°C at a rate of 60°C/hour or more after vacuum sintering.

Inventors:
OHATA Takumi (Wakamatsu, 9-1, Kitahama 1-chome, Wakamatsu-ku, Kitakyusyu-sh, Fukuoka 23, 〒8080023, JP)
MATSUMOTO Shunji (Wakamatsu, 9-1, Kitahama 1-chome, Wakamatsu-ku, Kitakyusyu-sh, Fukuoka 23, 〒8080023, JP)
Application Number:
JP2017/027861
Publication Date:
February 08, 2018
Filing Date:
August 01, 2017
Export Citation:
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Assignee:
HITACHI METALS, LTD. (2-70, Konan 1-chome Minato-k, Tokyo 24, 〒1088224, JP)
International Classes:
C22C29/08; B21B27/00; C22C1/05
Foreign References:
JP2007092090A2007-04-12
JP2004255401A2004-09-16
Attorney, Agent or Firm:
TAKAISHI Kitsuma (Kagurazaka FN Bldg. 5F, 67 Kagurazaka 6-chome, Shinjuku-k, Tokyo 25, 〒1620825, JP)
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