Abstract: The present invention provides a cold rolling composite work roll with an outer layer having excellent high abrasion resistance and spalling resistance. The outer layer of the cold rolling composite work roll comprises; 0.9-1.5 wt % C, 0.3-1.0 wt % Si, 0.3-1.0 wt % Mn, 4.0-10.0 wt % Cr, 2.0-8.0 wt % Mo, 0.5-5.0 wt % V, and the remainder Fe and unavoidable impurities. A cold rolling composite work roll with high abrasion resistance has an outer layer with the above-mentioned composition wherein Mo is 3.0-8.0 wt %, formed by a continuous process for cladding around the perimeter of a core material made from ingot steel or forged steel. A cold rolling composite work roll with excellent spalling resistance has the above-mentioned composition wherein the surface portion of the outer layer formed by the continuous pouring process for cladding has a compression residual stress of 60 kgf/mm2 or lower and a Shore hardness of HS 90 or greater.

Abstract: A roll for use in the manufacture of paper and board, a press roll, in particular a center roll in a press, a backup roll for an extended-nip press roll, a hot press roll, or equivalent, which is in direct contact with a wet paper web, or a calender roll, a method for manufacturing the same and a coating composition therefor including an adhesion layer arranged on the frame part of the roll and a ceramic layer arranged on the adhesion layer. The ceramic layer has a thickness of from about 100 &mgr;m to about 2000 &mgr;m and includes from about 50% to about 95% by weight of Cr2O3 and from about 3% to about 50% by weight of TiO2, or from about 50% to about 80% by weight of Al2O3 and from about 20% to about 50% by weight of ZrO2, or exclusively Al2TiO5. The outer face of the ceramic layer is finished until the roughness Ra is from about 0.2 &mgr;m to about 2.0 &mgr;m and/or the porosity of the outer face of the roll is from about 1% to about 20%.

Abstract: A method of preparing a hearth roll with a coating, including: plating a metal on a ceramic powder by using electroless plating; mixing the metal-plated ceramic powder and a metal powder to form a cement powder; and thermally spraying the cement powder onto a hearth roll. Another method is: plating a metal on a ceramic powder by using electroless plating; mixing the metal-plated ceramic powder, a metal powder, and a binder to form a slurry, and subjecting the slurry to granulating and sintering to obtain a sintered powder; and thermally spraying the sintered powder onto a hearth roll.

Abstract: A process for preparing removable metal sleeve for gravure printing machines has been carried out in which after treating the lateral surface of the cylinder with a separator product and after associating protective strips in closure of the through holes of the lateral surface of the cylinder, the same is dipped into an electro-copper plating bath for forming a copper removable sleeve and axial removing of the copper sleeve is obtained by means of compressed air forced to form an air cushion between the cooper sleeve and the lateral surface of the cylinder and by means of a separator product used between the same copper sleeve and the cylinder.

Abstract: High-quality high-speed steel roll which is markedly excellent in abrasion resistance and free of carbide segregation even in the case of production by centrifugal casting of economical benefit; it comprises an outer layer containing, by all weight ratios, C; 2.4-2.9%, Si; not more than 1%, Mn; not more than 1%, Cr; 12-18%, Mo; 3-9%, V; 3-8% and Nb; 0.5-4%, and meeting with the following equations (1) and (2) at one time,0.27.gtoreq.Mo (%)/Cr (%).ltoreq.0.7 (1)C (%)+0.2.multidot.Cr (%).ltoreq.6.2 (2)the outer layer further containing as the balance Fe and unavoidable impurities.

Abstract: A roll of a winding equipment in a rolling factory is formed of a roll body, a hardened buildup substrate formed on a surface of the roll body, and a carbide-particle-dispersed-type autogenous-alloy-sprayed layer having a thickness of at least 0.5 mm and formed on the substrate. The autogenous-alloy-sprayed layer contains 3-60% by weight of carbide particles or complex carbide particles. The carbide particles or complex carbide particles have a particulate shape or a leaf shape with a size of 3-300 .mu.m. The roll can exhibit good abrasion resistance and plate flaw resistance, and good conveyance property for a passing plate material.

Abstract: A hot rolling method of steel products comprises rolling steel products while forming a film of an oxalate (such as iron oxalate, calcium oxalate and the like) on the roll surfaces which have contact with the steel products to be rolled and a hot rolling roll for steel products which has an oxalate film on the roll surfaces having contact with the steel products to be rolled. The oxalate film is effective in preventing steel products, particularly stainless steel products, from seizing between the rolls and the steel products to be rolled, preventing wear of the rolls, and preventing the deterioration of both the rolls and the steel products, when the steel products are subjected to hot rolling.

Abstract: A sleeve adapted to be mounted on a mandrel to form a liquid transfer roll or the like comprises a radially expandable inner skin defining a radially inner surface of the sleeve, at least one radially compressible intermediate layer of resilient plastic material; and a rigid, self-supporting metal outer tube. Further methods for producing such a sleeve are described.

Abstract: A roll outer layer material for hot rolling includes, as analyzed in weight percent, of 2.5-4.0% C, 6.0-20% Cr, 3.0-10.0% V, 0.6-5.0% Nb, 2.0-15% Mo, 3.0% or below Si, 3.0% or below Mn, C, V, Nb and Cr satisfying a following formula (1),10.5(%).ltoreq.6.5.C(%)-1.3.V(%)-0.7.Nb(%).ltoreq.2.Cr(%)-2(%)(1), and the balance being Fe and incidental impurities. A method of manufacturing a roll for hot rolling includes the steps of centrifugally casting an outer layer material having the above composition, centrifugally casting graphite steel containing 0.5% or above of C as an intermediate layer, and casting an axis material which is a spheroidal graphite cast iron, a flake graphite cast iron or a graphite steel. C is present in the intermediate layer in an amount which satisfies a following formula (2),C (intermediate layer).gtoreq.2.0-0.5 (C-0.2 V-0.

Abstract: A forged roll for rolling a seamless steel pipe, having excellent biting properties and wear resistance. The forged roll includes a high carbon alloy cast steel comprising about 1.10-1.85 wt % carbon, about 0.3-1.2 wt % silicon, about 0.4-1.5 wt % manganese, about 0.5-2.0 wt % nickel, about 0.5-2.0 wt % chromium and iron. Heat treatment for spheroidal carbide formation is performed so that the spheroidal carbide covers about 35-55% of the area of the roll metallurgical structure.

Abstract: A submerged guide member for guiding a strip of metal in a molten metal coating bath in the form of a roller or fixed guide consisting of sintered, fused or vitreous silica or a mixture of at least 80% by weight of fused or vitreous silica and up to 20% by weight of one or more members of the group consisting of refractory earth elements, metal oxides and compounds of oxides, carbides, borides, oxynitrides, SiAlON, thermal decomposition products of carbosilanes, calcia, magnesia, zircon (ZrSiO.sub.4), zirconia, chromia and silicon carbide. The process concerns the deposition of a protective layer of, for example, zinc on a strip of sheet metal by submerging the metal strip in a bath of molten metal or metal alloy, and guiding the strip with one or more submerged rollers or fixed guide members of the fused silica material set forth above.

Abstract: A roll outer layer material for hot rolling consists essentially, as analyzed in weight percent, of 2.5-4.0% C, 6.0-20% Cr, 3.0-10.0% V, 0.6-5.0% Nb, 2.0-15% Mo, 3.0% or below Si, 3.0% or below Mn, C, V, Nb and Cr satisfying a formula where 10.5.ltoreq.6.5.C(%)--1.3.V(%)--0.7.Nb(%).ltoreq.2.Cr(%)--2, and the balance being Fe and incidental impurities. A method of manufacturing a roll for hot rolling comprises the steps of centrifugally casting an outer layer material having the above composition, centrifugally casting graphite steel containing 0.5% or above of C as an intermediate layer, and casting an axis material which is a spheroidal graphite cast iron, a flake graphite cast iron or a graphite steel. Carbon is present in the intermediate layer in an amount which satisfies a formula, C (intermediate layer).gtoreq.2.0-0.5?C(%)--0.2.V(%)--0.11.Nb(%)! (outer layer).

Abstract: A high temperature pressing roll has a cast or formed steel roll which is coated with a molybdenum-containing alloy. The preferred alloy has 14 to 16 percent molybdenum, 28 to 30 percent nickel, 30 to 34 percent chromium, 1.2 to 1.8 percent silicon, 4 to 4.5 percent boron, a maximum of 0.2 percent carbon and copper between 3 and 3.8 percent with the balance being iron. The roll is first coated with a bonding coating consisting of nickel and chromium. This bonding layer is then flame sprayed or plasma sprayed with a molybdenum alloy. The coating once applied is ground to a 30 RA or smoother surface. The molybdenum alloy is sprayed on to achieve a surface depth of approximately forty thousandths of an inch.

Abstract: A coating bar for a bar coater, wherein the coating bar is supported substantially over its entire length revolving in a cradle fixed to the frame of the coater. The coating bar is profiled and surface-treated by boronizing so that a layer of iron boride is applied to the profiled surface of the coating bar.

Abstract: A silicone rubber roll is characteristically prepared on a metallic center by forming a layer of the cured product of a silicone rubber composition which comprises (A) organopolysiloxane, in which the total amount of low molecular weight siloxanes having a degree of polymerization ranging from 3 to 20 is controlled to be at most 10,000 ppm, (B) reinforcing silica powder with a specific surface area of at least 50 m.sup.2 /g, (C) silicone elastomer particles with an average particle size of 200 .mu.m, in which the total amount of low molecular weight siloxanes having a degree of polymerization ranging from 3 to 20 is 2,000 ppm or less, and (D) a curing agent.

Abstract: A continuous hot dipping apparatus which comprises a slide bearing structure of a bearing and a roll shaft which is of a combination of a ceramic material and a solid lubricant material, and which has good wear resistance and long term durability. A heat resistant steel is provided, which is used in a molten metal of hot dipping and which essentially consists of 0.15-0.30% C, not more than 20% Si, not more than 2% Mn, 20-30% Cr, 10-20% Ni and not less than 50% Fe.

Abstract: A composite working roll, in particular for a roughing or finishing stand of a hot strip rolling mill, said working roll comprising a core of a metal selected from the group consisting of iron and steel, an outer zone of chromium-vanadium steel and a bonding zone between said core and said outer zone, wherein said steel of said outer zone contains 1.3 to 2.2% by weight carbon, 8 to 16% by weight chromium and 4 to 7% by weight vanadium, the remainder being constituted by iron and other elements which are usually present.Preferably the steel of the outer zone contains 9 to 14% chromium and 5 to 6,5% vanadium and the vanadium content decreases with increase in the carbon content.

Abstract: A ceramic conveyance roller having a tetragonal phase crystal grain structure includes zirconium oxide and yttria and the molar ratio of yttria to zirconium oxide of from about 3:97 to about 5:95. The outer surface of the ceramic roller has a dimensional tolerance of less than 0.003 inches and the inner surface has a dimensional tolerance of less than 0.0005 inches. The outer surface of the roller can be modified to the cubic phase crystal grain or the monoclinic phase crystal grain.

Abstract: A wear- and seizing-resistant roll for hot rolling has a composition consisting essentially, by weight, of 2.0-4.0% of C, 0.5-4.0% of Si, 0.1-1.5% of Mn, 1.0-7.0% of Cr, 2.0-10.0% of Mo, 2.0-8.0% of V and balance of Fe and inevitable impurities; and has a metal structure comprising a matrix substantially comprising martensite, bainite or pearlite, 0.5-5% in area ratio of graphite, 0.2-10% in area ratio of MC carbides and 40% or less in area ratio of cementite. The roll of the present invention is suitable for work roll in the latter stand of a finishing train of a hot strip mill.

Abstract: A new and improved printing cylinder or image carrier sleeve which is formed of either carbon fiber/particles or from a relatively thin flat sheet of metal. The flat sheet of metal, for example, stainless steel or tin, is rolled to form a cylinder of desired diameter and welded together along the longitudinal edges. The weld seam or spots may be filed to have a substantially flat and smooth surface. Also disclosed is a mandrel assembly having an outer expansion sleeve member with one or more yield or preferential expansion regions, for example, circumferential grooves for applying pressure to effect outward expansion of said outer sleeve member.

Abstract: A cold rolling work roll having improved grindability is made from forged steel of a composition consisting, by weight, essentially of:C: 0.70-1.20%, Si: 0.15-1.00%, Mn: 0.15-1.00%,Cr: 1.5-5.5%, Mo: not mroe than 0.60%,Ti: up to 0.0029%, V: 0.1-0.49%,Ni: 0-1.0%,Fe and incidental impurities: balance. Preferably the maximum particle size of the carbides is adjusted to be no more than 1.50 .mu.m.

Abstract: The compound roll having a shell portion made of a hard, high-alloy cast steel or 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 1.0-3.0% of C, 2.0% or less of Si, 2.0% or less of Mn, 2.0-15.0% of Cr, 10.0% or less of Mo, 2.0-8.0% of V, the balance being substantially Fe and inevitable impurities, an average diameter of crystal grains constituting a matrix of the metal structure of the shell portion being 100 .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 crystal grains having diameters exceeding 30 .mu.m, and the crystal grains satisfying the formula: m.sub.2 .ltoreq.1.2 m.sub.1, wherein m.sub.1 is an average diameter of the crystal grains at the surface of the shell portion, and m.sub.

Abstract: A printing cylinder is disclosed comprising a four-piece mandrel assembly having spaced outer journal sections, a first cylindrical sleeve circumferentially mounted at its ends about a respective journal section, a second cylindrical sleeve having an inner diameter slightly larger than the outer diameter of said first cylindrical sleeve and being circumferentially mounted thereon by means, for example, circumferential welds, to provide a substantially uniform space circumferentially between said first and second sleeve members, said second sleeve member having one or more yield or preferential expansion regions, for example, circumferential grooves and a hydraulic system for applying pressure between said first and second sleeve members to thereby effect outward expansion of said second sleeve member.Another feature of the invention comprises the interchangeability of image carrier sleeves each having a selected thickness for mating operation with different inking rollers.

Abstract: A cold rolling work roll having improved grindability is made from forged steel of a composition consisting, by weight, essentially of:C: 0.70-1.20%,Si: 0.15-1.00%,Mn: 0.15-1.00%,Cr: 1.5-5.5%,Mo: not more than 0.60%,Ti: 0.0030-0.0100%,Ni: 0-1.0%,V : 0-0.20%,Fe and incidental impurities: balance.Preferably the maximum particle size of the carbides is adjusted to be no more than 1.50 .mu.m.

Abstract: A lightweight ink transfer roll adapted for use in a flexographic printing apparatus. The roll includes an aluminum body member having a cylindrical outer surface, tubular opposite end portions, and a solid medial portion which forms a mid span stiffener in the roll. An aluminum header is fixed in each of the tubular end portions, and each of the headers has an inner end surface which is spaced from the solid medial portion of the body member so as to leave an open void therebetween. An outer covering layer, of for example aluminum oxide or a flame sprayed ceramic, overlies the outer cylindrical surface of the body member, and a plurality of ink metering cells are formed in the outer covering layer. Preferred methods of fabricating the roll are also disclosed.

Abstract: A method for manufacturing a cylindrical mantle of rolls or cylinders of a paper machine out of a corrosion-proof metal or alloy material, particularly refined steel, in which oblong plate blanks are cut to a length equal to the total length of the roll mantle to be manufactured. The plate blanks are machined or bent to mantle portions of a cross-sectional shape equal to a part of a circular ring. Out of the mantle portions, the cylindrical mantle of a roll or cylinder is assembled by joining the mantle portions together by means of axial welding joints prepared by electron-beam welding performed in the vacuum chamber of an electron-beam apparatus by using a number of mantle portions per one roll mantle. A roll or cylinder manufactured by the method is also described.

Abstract: A press roll is disclosed for removing water, the press roll provided in the press portion of a paper machine. The press roll has a metal base and a sprayed coating provided on the outer surface of the metal base, at least the outer layer of the sprayed coating being a sprayed mixture of a plastics and at least one of a ceramics and a cermet. The outer surface of the plastic portion of the sprayed coating has a lapped, depressed surface relative to the outer surface of the ceramic or cermet portion.

Abstract: The invention is related to a process for the manufacture of a roll, in particular of a calender roll for a paper machine. In the process, the mantle of the roll is cast or cast and heat-treated and, in the next step, the roll mantle is machined. In the process, the surface layer of the cast-iron roll mantle is hardened and tempered so that, in the surface layer of the roll mantle, a temper-martensitic structure is produced. The roll mantle is then subjected to finishing machining in a manner known in the art. The invention is also related to a roll, in particular a calender roll for a paper machine, which roll is provided with a cast-iron mantle. The surface layer of the roll mantle is hardened and tempered so that the surface layer of the roll mantle is temper-martensitic.

Abstract: A photoreceptor drum substrate comprising a drum of aluminum or aluminum alloy polished at the surface by centerless polishing. The photoreceptor drum substrate is manufactured by applying extrusion to a blank made of aluminum or aluminum alloy, then applying drawing to obtain a pipe material with less than 0.1% of bending to the entire length and satisfying the relation for wall thickness t, outer diameter .phi. and yield strength .sigma..sub.0.2, t.sup.2 .times..sigma..sub.0.2 /.phi..gtoreq.0.2 and then applying centerless polishing to the surface of the drum.

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.

Abstract: The invention provides a fuser roll useful for heat-fixing an electrographic toner to a substrate, wherein the roll comprises a core having thereon a base cushion layer comprising a condensation-crosslinked poly(dimethylsiloxane) elastomer and having at least one other layer thereover, characterized in that the base cushion layer has zinc oxide particles dispersed therein in a concentration of from 8 to 40 percent of the total volume of the base cushion layer. The base cushion layer of such a fuser roll has been unexpectedly found to exhibit only minimal weight loss, creep, and changes in hardness, over time, when subjected to conditions of elevated temperature and cyclic stress.

Abstract: A coating comprising a non-porous textured corrosion resistant and abrasion resistant base layer of metal is applied by a thermal flame spray process using a high-velocity oxy-fuel, and a top coating of a continuous film of fluoropolymer is used to enhance and protect the surface bare metal on industrial rollers in a multitude of industrial environments that are corrosive, abrasive or otherwise have elements present which tend to stick to the roller surface. The corresponding method comprises the steps of providing a body member having a relatively soft and corrodible metal first layer, applying a middle metal layer to the first layer by a high-velocity oxy-fuel type metal thermal spray process, applying an outer layer comprising a fluoropolymer coating over said middle layer to provide a non-sticking characteristic to the coating; and heating said outer layer to a level above the curing temperature of the fluoropolymer so as to bond the fluoropolymer to said middle layer.

Abstract: A backup roller assembly having a plurality of rollers for applying pressure to an inside surface of a photoreceptor web, and a process for making such backup rollers is disclosed wherein a thin walled tube is extruded from a metallic or polymeric material. After extrusion, the tubing is cut to a desired length and filled with a filler, preferably a urethane foam for providing support for the thin-walled tubing, for the adhesion of journals at each end of the tube and for grounding the photoreceptor web. After the journals are attached at each end of the tubing by the adhesion of the foam, the backup roller can be ground to a precise outer diameter. In a final step, the journals are machined to the proper specifications.

Abstract: The wear-resistant compound roll is constituted by a shell portion made of an iron-base alloy having the composition consisting essentially of 1.0-3.5 weight % of C, 3.0 weight % or less of Si, 1.5 weight % or less of Mn, 2-10 weight % of Cr, 9 weight % or less of Mo, 20 weight % or less of W, 2-15 weight % of V, 0.08 weight % or less of P, 0.06 weight % or less of S, 300 ppm or less of B, the balance being substantially Fe and inevitable impurities, and a shaft portion made of steel. The iron-base alloy of the shell portion has a structure containing by an area ratio 5-30 % of granular carbides and 5 % or less of non-granular carbides, an alloy matrix of the shell portion having a Vickers hardness (Hv) of 550 or more. This compound roll has excellent wear resistance and resistance to surface roughening.