Patent
Cast alloy for composite roll shell
Masayuki Kato,Yoshihiro Nakagawa +1 more
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TLDR
In this article, a pig iron-like matrix with granular pearlite and granular graphite is refined to improve the wear resistance of an alloy by restricting the component ratio of the alloy and heat treatment temps.Abstract:
PURPOSE: To considerably improve the wear resistance of an alloy by restricting the component ratio of the alloy and heat treatment temps. to form a nearly white pig iron-like matrix in which granular pearlite and sorbite occupy more than 50%, and by limiting the amt. of carbides precipitated in the matrix. CONSTITUTION: An alloy is refined consisting of, by wt., C; 2W3%, Si; 0.4W1.5%, Mn; 0.4W2%, Ni; 1.5W4%, Cr; 0.8W3%, Mo; 0.5W2%, one or more out of V, Nb, Ti, Zr and W; 0.5W3.5% and the balance Fe practically. The alloy is subjected to diffusion heat treatment, hardening normalizing heat treatment, spheroidizing heat treatment and tempering strain relieving heat treatment in each suitable temp. range to form a nearly white pig iron-like matrix in which sorbite of high toughness and granular pearlite occupy more than 50%, and fine graphite is hardly precipitated. At the same time, the content of Fe type carbide is reduced to 30W50%, and the carbide is finely granulated and dispersed. 2W10% of V, Ti, Zr and Nb carbides of high hardness are further precipitated. Thus, the wear resistance of the alloy can be enhanced considerably. COPYRIGHT: (C)1979,JPO&Japioread more
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Patent
Wear-resistant compound roll
TL;DR: In this paper, a wear-resistant compound roll consisting of an outer layer (8) and a shaft portion (10) produced by a centrifugal casting method is presented, which is made of an iron-base alloy having a composition (by weight %) consisting essentially of 1-4 % of C, 3 % or less of Si, 1.5 % of Mn, 4 % of Ni, 2-15 % of Cr, 8 % of Mo, 20 % of W, 2 -10 % of V and balance substantially Fe and inevitable impurities.
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TL;DR: In this paper, a composite roll for hot rolling is characterized in which the composite roll has a fixed roll diameter L 0 in the axis direction and its inner layer I is composed of steel system materials and its outer layer O is made of Heiss system materials.
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Wear-resistant composite roll
TL;DR: In this paper, the outer shell layer of a composite roll was specified to be composed of chemical components of 1 to 4% C, ≤ 3% Si, ≤ 1.5% Mn, ≤ 4% Ni, 2 to 15% Cr, ≤ 8% Mo, ≤ 20% W, 2to 10% V and the balance substantial Fe with inevitable impurity elements.
Patent
High vanadium composite cast iron roll
Hideo Fujita,Tatsuo Nishida +1 more
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