Method of producing a compound roll

Details Method of producing a compound roll Method of producing a compound roll

1992-03-06

1994-04-26

Eley, Timothy V.

Metal working

Method of mechanical manufacture

Roller making

2989533, 492 58, 492 54, B31B 3108

Patent

active

053055225

ABSTRACT:
The compound roll comprising a shell portion made of a hard cast iron having excellent wear resistance and resistance to surface roughening and a core portion made of a tough cast iron or cast steel, the cast iron of the shell portion having a composition consisting essentially, by weight ratio, of 2.5-3.5% of C, 0.5-1.5% of Si, 0.5-1.5% of Mn, 0.1% or less of P, 0.05% or less of S, 3.0-5.0% of Ni, 1.0-2.5% of Cr, 0.1-1.5% of Mo and balance Fe and inevitable impurities, an average diameter of primary precipitated particles constituting a matrix of the metal structure of the shell portion being 80 .mu.m or less in a range from a surface to a depth of 50 mm when determined by an image analysis method on the primary precipitated particles having diameters exceeding 30 .mu.m, and the primary precipitated particles satisfying the formula: m.sub.2 .ltoreq.1.2 m.sub.1, wherein m.sub.1 is an average diameter of the primary precipitated particles at the surface of the shell portion, and m.sub.2 is an average diameter of the primary precipitated particles at the depth of 50 mm, is produced by supplying a melt for the shell portion at a temperature T satisfying the formula: Tc-20.degree. C..ltoreq.T.ltoreq.Tc+70.degree. C., wherein Tc is a primary crystal-forming temperature of the melt for the shell portion, to a hollow cylindrical mold rotatable around its longitudinal axis, at such a speed that an average shell portion-forming speed in the mold is 2-40 mm/min.

REFERENCES:
patent: 3968551 (1976-07-01), Miyashita
patent: 4433032 (1984-02-01), Nakamura et al.
patent: 4548653 (1985-10-01), Bocquet et al.
patent: 4721153 (1988-01-01), Sano et al.
patent: 4726417 (1988-02-01), Sano
patent: 4771524 (1988-09-01), Barbezat et al.
patent: 4861549 (1989-08-01), Khare
patent: 4958422 (1990-09-01), Oshima et al.
patent: 5053284 (1991-10-01), Noda et al.
Patent Abstracts of Japan, p. 97 M 641 Kokai No. 62-127 108.
Patent Abstracts of Japan, p. 161 C 287.

Affiliated with

Also associated with

Rating

Method of producing a compound roll does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method of producing a compound roll, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of producing a compound roll will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1703598