[go: up one dir, main page]

US2030891A - Rolling mill roll, method of making same, and product of such roll - Google Patents

Rolling mill roll, method of making same, and product of such roll Download PDF

Info

Publication number
US2030891A
US2030891A US573307A US57330731A US2030891A US 2030891 A US2030891 A US 2030891A US 573307 A US573307 A US 573307A US 57330731 A US57330731 A US 57330731A US 2030891 A US2030891 A US 2030891A
Authority
US
United States
Prior art keywords
roll
rolls
chilled
zone
iron
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US573307A
Other languages
English (en)
Inventor
William H Payne
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
American Rolling Mill Co
Original Assignee
American Rolling Mill Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by American Rolling Mill Co filed Critical American Rolling Mill Co
Application granted granted Critical
Publication of US2030891A publication Critical patent/US2030891A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/38—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for roll bodies
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/30—Foil or other thin sheet-metal making or treating
    • Y10T29/301—Method
    • Y10T29/302—Clad or other composite foil or thin metal making
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49544—Roller making
    • Y10T29/4956—Fabricating and shaping roller work contacting surface element
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12993—Surface feature [e.g., rough, mirror]

Definitions

  • My invention relates to the rolling of sheet metal and the product produced thereby in which a surface is developed on the sheets which will permit of forming an even film of enamel coating thereon, which coating will persist during firing;
  • the invention is particularly valuable in vitreous enameling.
  • Enamelers have in the past sought to key their enamel to surfaces of metal sheets by developing a roughness in the sheets prior to enameling, and to that end have acid treated the surface of chilled rolls usedin cold rolling the sheets, and also have acid treated the sheets themselves.
  • the surfaces so developed have not been satisfactory from the 5 point of view of application of the liquid enamel film, however, and do not serve the purpose of my invention herein.
  • the surface required by my invention is one consisting of tiny areas visible to the eye and alternately raised and depressed and which, incidentally, are a pattern of the intermixed hard and soft particles to be found in the portion next within the chilled portion of ordinary chilled rolls used in cold rolling of sheet metal.
  • the indentations forming the roughened surface being 5 of too large area to serve directly as a tooth for the coating; they rather subdivide the surface area to be coated into a multiplicity of very small areas. These small subdivided areas are bounded by irregular, more or less sharply raised ridges resulting from impressions imparted to the sheet surface according to my invention by a cold rolling operation between rolls whose characteristics will now be described.
  • Figure 1 is a partial sectional view of a roll Gil showing in purely diagrammatic form the various constituent layers thereof as hereinafter described.
  • the rolls which I employ in producing sheets of novel roughened surface can be most readily prepared from rolls having an effective outer layer of alternating hard and soft constituents, for best results these constituents being of maximum hardness and maximum soft? ness, respectively, and maximum size, which may be possibly obtained in a cast metal structure.
  • Such hard constituents are e. g., combinations of carbon and iron, such as cementite, while ferrite, combinations of ferrite and cementite (pearlite and its variants) and graphite may constitute the soft constituents of said effective surface layer of the rolls, the hard and soft areas being of such size as to be well perceptible to the unaided eye.
  • the rolls which I employ in producing my novel roughened surface on sheets which are to be subsequently coated have initially a surface condition quite different from that of rolls usually employed in sheet rolling, including cold rolling, whose surface is made of as uniform hardness as practicable, e. g., chilled cast iron, which is uniformly dense, hard, and capable of receiving a very high polish.
  • the rolls which I employ have a surface of nonuniform hardness, hard and soft constituents such as cementite and pearlite and perhaps graphite alternating, as for instance, filler and binder alternate in a molded compound.
  • the usual cast iron chilled roll employed in rolling mills is formed of two kinds of iron, a central core of gray iron I, and an outer surface of chilled iron 2.
  • the outer chilled surface does not terminate abruptly, but forms with the gray iron an intermediate zone 3, in which .both gray iron and chilled iron are found together with small particles of graphitic carbon.
  • the chilled iron is intermixed in the gray iron mass through this zone inthe form of small particles and sometimes in thin tree-like bodies known technically as dendrites, principally consisting of cementite in this case, whichi as is well known, is extremely hard.
  • the intermediate zone containing the dendrites, or cementite particles, graphitic carbon and gray iron will, in this specification, be referred to as the dendrite zone, whether or not the characteristic dendrites are present.
  • the rolls are from'time to time polished and trued up by revolving them against each other inthe presence of water, but as soon as the outer chilled surface is worn away and the dendrite zone begins to come into evidence, the rolls have in the past been scrapped as worthless, or used for roughing rolls in the hot mill.
  • I may thus employ chilled rolls which have been worn and polished downso as to be valueless for hot rolling orordinary cold rolling, or, of course, may employ chilled rolls from which the chill has been ground off, for likewise uncovering the dendrite zone.
  • the surface required is to grind them against each other in the presence of water, as in polishing, which grinding action is continued for around eight hours. celerated by mixing with the water flown on the idling rolls some grinding compound which is of such hardness that it will attack the softer constituents of the roll surface, but not the harder.
  • a material suitable as such a' grinding compound is, for instance, fine open-hearth flue dust.
  • the rolls are then ready for use and are -employed, as in ordinary cold rolling, to impart oped is sharply marked.
  • the rolls. so produced are used in the same way as surface finishing cold rolls in ordinary practice.
  • the acid treatment of itself can be carried on in the same way that cold rolls have been treated in the past.
  • Another mode of providing a suitable roll for my purpose is to heat-treat chilled rolls, thereby modifying the carbon content in the original chilled surface and subsequently developing a roughened surface as hereinbefore described.
  • the grinding action may be ac- I have not attempted any other modes titrat- Q ing chilled rolls to develop a toothed surface roughness or marking,'but believe that other methods might be developed, once the efiectiveness of cold rolling-sheets with chilled rolls bared to the dendrite zone is known. Being, as I believe, the first to develop this idea, however, I
  • the product of rolling with cold rolls having a toothed rough or marked surface in the dendrite zone, or what corresponds to it, is quitedifferent in surface from any sheethitherto produced and with which I am familiar.
  • the impressions in the sheet are fine in character and the bounding walls of the markings are sharp, that is to say, they project at an abrupt angle from the top of a projection to the bottom of a depression, and will persist after pickling, a step usually resorted to in the final metal sheets for enameling.
  • the sheets have found great popularity with enamelers and are highly prized for vitreous enameling work.
  • the invention has application, however, whenever the rough surface typical of a dendrite zone impression is desirable.
  • a process of preparing rolls for the formation' of roughenedsheets characterized by a dendritic pattern which comprises removing the chilled portion from a chilled cast-iron roll to leave a surface characteristic of a zone intermediate the chilled portion and the gray iron portion, and treating said surface by removing, in part at least, the softer portions thereof so that the harder portions thereof stand up in relief in accordance with the structure of said zone.
  • a sheet of ferrous metal particularly adapted for use as enameling stock said sheet having a surface which, irrespective of its metallurgical structure, is characterized by deep, sharp edged pits which are a counterpart of a relief pattern of the dendritic structure of that intermediate zonein a chilled casting which lies between the chilled outer layer and the gray iron inner body of the casting.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Metal Rolling (AREA)
  • Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
US573307A 1936-01-10 1931-11-05 Rolling mill roll, method of making same, and product of such roll Expired - Lifetime US2030891A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB941/36A GB459328A (en) 1936-01-10 1936-01-10 Method of rolling sheets and products thereof

Publications (1)

Publication Number Publication Date
US2030891A true US2030891A (en) 1936-02-18

Family

ID=9713196

Family Applications (1)

Application Number Title Priority Date Filing Date
US573307A Expired - Lifetime US2030891A (en) 1936-01-10 1931-11-05 Rolling mill roll, method of making same, and product of such roll

Country Status (5)

Country Link
US (1) US2030891A (zh)
BE (1) BE413408A (zh)
DE (1) DE665917C (zh)
FR (1) FR800820A (zh)
GB (1) GB459328A (zh)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3416435A (en) * 1966-06-13 1968-12-17 Beloit Corp Roller press
US4546527A (en) * 1981-12-01 1985-10-15 Kubota Ltd. Composite sleeve for use in rolling rolls for H-section steel and channel steel

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3416435A (en) * 1966-06-13 1968-12-17 Beloit Corp Roller press
US4546527A (en) * 1981-12-01 1985-10-15 Kubota Ltd. Composite sleeve for use in rolling rolls for H-section steel and channel steel

Also Published As

Publication number Publication date
DE665917C (de) 1938-10-08
GB459328A (en) 1937-01-06
BE413408A (zh) 1936-02-29
FR800820A (fr) 1936-07-20

Similar Documents

Publication Publication Date Title
US2024007A (en) Method of producing mat finish on hardened rolls
US3613319A (en) Metal rolling work roll and method of making same
US1932168A (en) Roll for making rolled products and method for producing it
US2030891A (en) Rolling mill roll, method of making same, and product of such roll
US2593460A (en) Method of producing metal sheets
US2102162A (en) Method of producing etched surfaced shells and casings
US1960958A (en) Method of cold rolling steel strips and product thereof
US2059384A (en) Coated rolling mill roll
JPH0985306A (ja) ダル仕上ステンレス鋼板の製造方法
US1656892A (en) Method of making high-finish sheets
US2105968A (en) Method of rolling ferrous sheets
JPH06179002A (ja) 表面処理ステンレス鋼板の製造方法
JPS57101646A (en) Composite roll for rolling plate
US2921419A (en) Grinding and polishing of glass sheets
JPS6149701A (ja) 表面欠陥が少なく耐食性のすぐれたステンレス薄鋼板の冷間圧延方法
US861558A (en) Process of finishing the surfaces of rolls, dies, &c.
US2171300A (en) Method of producing ferrous sheet material
JPH0673696B2 (ja) 表面品質に優れたステンレス薄板の製造方法
EP0075322A3 (de) Verfahren zum Aufrauben der Walzenoberfläche einer Dressierwalze für das Nachwalzen von Feinblech
US155691A (en) Improvement in the manufacture of sheet-iron
JPS62214801A (ja) チタンスラブの表面手入方法
JPH09267105A (ja) 冷間圧延用ロールのショットダル加工方法
US36822A (en) Improvement in the manufacture of sheet-copper
JPS6260164B2 (zh)
JPH03146211A (ja) 冷間圧延用ステンレス予備処理鋼帯の製造方法