WO2002024964A1 - Procede de fabrication d'une virole d'un cylindre utilise dans la fabrication ou le traitement du papier et/ou du carton - Google Patents

Procede de fabrication d'une virole d'un cylindre utilise dans la fabrication ou le traitement du papier et/ou du carton Download PDF

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Publication number
WO2002024964A1
WO2002024964A1 PCT/FI2001/000792 FI0100792W WO0224964A1 WO 2002024964 A1 WO2002024964 A1 WO 2002024964A1 FI 0100792 W FI0100792 W FI 0100792W WO 0224964 A1 WO0224964 A1 WO 0224964A1
Authority
WO
WIPO (PCT)
Prior art keywords
roll
quenching
shell
carried out
roll shell
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.)
Ceased
Application number
PCT/FI2001/000792
Other languages
English (en)
Inventor
Kari Blomster
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.)
Valmet Technologies Oy
Original Assignee
Metso Paper Oy
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 Metso Paper Oy filed Critical Metso Paper Oy
Priority to AU2001287766A priority Critical patent/AU2001287766A1/en
Priority to AT01967378T priority patent/ATE301728T1/de
Priority to EP01967378A priority patent/EP1379702B1/fr
Priority to DE60112618T priority patent/DE60112618T2/de
Priority to JP2002529556A priority patent/JP2004510049A/ja
Publication of WO2002024964A1 publication Critical patent/WO2002024964A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • C21D9/08—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes
    • C21D9/085—Cooling or quenching
    • 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
    • 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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/18—Hardening; Quenching with or without subsequent tempering
    • 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
    • C21D2221/00—Treating localised areas of an article
    • C21D2221/10—Differential treatment of inner with respect to outer regions, e.g. core and periphery, respectively
    • 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
    • C21D9/08—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes
    • C21D9/14—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes wear-resistant or pressure-resistant pipes

Definitions

  • the present invention relates to a method for making a roll shell and, more particularly, the invention relates to a method for making a roll shell of a heatable roll, i.e. a so-called the ⁇ no roll, which roll operates in practice as heated to a high temperature.
  • the invention relates to a method for making a roll shell of a roll used in the manufacture or further processing of paper and/or board, in which method a shell blank of the roll shell is made of steel and the shell blank is subjected to heat treatments comprising heating for hardening, quenching and tempering treatments.
  • a long nip calender is generally meant a calender in which a nip is formed between a heatable steel roll and a belt.
  • the nip pressure in the long nip calender can be regulated in the cross direction of the machine, i.e. in the CD direction, whereby, for example, the thickness of paper can be profiled.
  • the long nip calender can be formed of a belt calender in which a belt is passed, while guided by auxiliary rolls, around one nip roll serving as a backing roll for a thermo roll.
  • the long nip is formed between the thermo roll and said nip roll loading the belt.
  • the most common long nip calender is a shoe calender in which the belt is arranged to run around a stationary support structure and in which the belt is loaded against a thermo roll by means of a loading shoe which is located inside the loop of the belt and supported on the support structure.
  • the long nip is formed between the thermo roll and the shoe loading the belt.
  • the loading shoe of the shoe calender determines the length of the nip.
  • the length of the nip is typically in a range of 50-70 mm, i.e. the dwell time of the web in the nip is considerably below 10 ms.
  • the surface temperature of the thermo roll serving as the backing roll of the shoe roll is in a range of 70-300 °C, and the maximum pressure of the nip is in a range of 5-10 MPa.
  • the hardness of the calender belt in the shoe calender is in a range of 70-100 ShA. Longer nips of about 270 mm have been used in presses that are based on a shoe roll.
  • the method of making a roll according to the invention is not suitable for use in making rolls which are used in long nip calenders according to the state of the art.
  • the aim of the present invention is to provide a novel method for making a roll shell, which method allows drawbacks and problems associated with the state of the art to be avoided or at least substantially reduced.
  • the invention is mainly characterized in that in heat treatment, quenching is carried out such that hardening takes place in a directed manner from the outer surface of the roll shell inwards.
  • a tubular shell of a thermo roll is made of an alloy steel, for example, of a quenching and tempering steel such that a wrought steel blank is first made which is heat-treated after that in a suitable manner in order to achieve desired properties.
  • the heat treatment is carried out in a manner in which formation and decomposition of austenite occurs.
  • the aim of the heat treatment is to provide the roll shell with a hard and wear-resistant surface so that the roll is suitable as such for use, for example, as a heatable roll in a calender.
  • the surface produced and the basic structure of the material of the roll shall be such as to be suitable for being coated and/or uncoated.
  • the properties of the material of the roll after heat treatment shall be such that in the roll shell there are no harmful stresses, which might cause the roll to break as a result of abrupt temperature variations.
  • the roll shell according to the invention is manufactured of a well-hardening steel, for example, of a quenching and tempering alloy steel and, as one very usable grade, 34NiCrMo 6 steel is suitable for manufacture.
  • the desired properties are attained such that, when the shell blank (steel blank) has been made, it is heat- treated such that the blank is subjected to heating for hardening to a high temperature above the temperature of formation of austenite, to a range of about 820- 920 °C.
  • the quenching of the blank is performed after that in order to harden the blank, i.e. to form martensite in the structure.
  • the quenching is carried out into a medium, for example, in a basin.
  • the medium can be a liquid, for example, water or a liquid mixture, a gas mixture or a combination of a liquid and a gas mixture.
  • the quenching can also be carried out by a fluidized bed method. It is essential that before quenching the ends of the shell blank are closed, or water or another quenching medium is prevented by some other means from getting into the interior of the blank, to the inner surface of the blank. This provides the benefit that in connection with quenching, hardening, i.e. formation of martensite begins only from the outer surface of the shell blank, from which cooling proceeds in a di- rected manner in the material inwards. Consequently, in the invention, the inner parts of the roll material are not hardened, as a rule, completely at any rate.
  • the wear resistance of the roll material is improved. Tempering and relieving of residual stresses can be carried out after quenching.
  • the roll shell is made metallurgi- cally very stable. If the invention is intended particularly for the manufacture of a thermo roll shell, the shell shall be additionally provided with perforations for circulation of a heating medium. These holes or axial bores can be formed in the roll shell either before hardening or after hardening.
  • the change of the microstructure of the material from a martensitic structure to a bainitic or a bainitic-martensitic or a bainitic-ferritic structure or to combinations of them occurs steplessly.
  • This enables neutral or compression stress to be formed advantageously in the outer surface of the shell from which cooling begins, because with the progress of cooling the increase in the volume of material becomes smaller in the direction from the surface towards the interior. Since a neutral stress state or compression stress is created in the outer surface, the shell is not prone to damage or breakage even when abrupt variations of temperature occur in a finished roll which is in use. Such variations are possible if, for example, a liquid, e.g. water, is passed to a hot roll surface. If tensile stress remained in the surface, rapid cooling of a hot roll might cause the roll to break. The formation of tensile stress in the surface of the roll is prevented by means of the invention.
  • the steel used as material is steel used as material:
  • the melting of steel takes place in an electric arc furnace (EAJF) and the alloying proper as well as the setting of temperature take place in a holding furnace (LF), which is provided with electromagnetic stirring.
  • Casting is carried out by up- running casting into an ingot mould. When the casting has solidified and cooled to about 600 °C, it is moved to a forge, into a heating furnace in which it is heated to a temperature of about 1200-1285 °C at which forging is started and which is the temperature of the furnace.
  • the roll shell (tube) is made out of the casting by forging as a free forging.
  • a sturdy hydraulic press is employed in forging, which makes it possible to use sturdy tools, by means of which the low density in the middle of the casting can be compressed, h a tubular forging, the low density portion in the middle is cut off so as to form a blank for a centre hole to be made. Slag materials and other defects collected in the casting are removed from the cast mass in connection with forging.
  • the manufacture of a tubular forging takes place by pressing on a mandrel. When forged in the manner described above, the degree of deformation of the roll tube can be made uniformly good.
  • heat treatments are carried out such that there is first cooling in the air. This is immediately followed by normalizing to 820-920 °C, from which cooling takes place freely into the air. Immediately after that, soft annealing is carried out at about 630-700 °C, which is followed by cooling to room temperature.
  • the thus heat-treated steel is fine-grained, soft annealed for a quenching and tempering treatment.
  • the blank Since the surface of the blank must become clean, the blank is subjected to rough machining before it is quenched and tempered to a desired strength/hardness level. In that connection, soft annealing is of advantage because normally a large amount of material has to be removed.
  • Quenching and tempering i.e. heating to the austenite range and tempering after hardening are carried out in a furnace.
  • the quenching can be carried out into a liquid basin, for example, into an oil basin or water basin, or quenching can be carried out as air quenching. Since the strength level requirements of the piece are high, it is advantageous that the roll shell blanks are quenched into water. Tempering is carried out immediately after quenching at a temperature of about 340-660 °C.
  • the shell shall be provided further with substantially axial peripheral bores for circulation of a heating medium in the finished roll. These peripheral bores can be made when the shell is in a quenched and tempered state.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Articles (AREA)
  • Rolls And Other Rotary Bodies (AREA)
  • Paper (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Making Paper Articles (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Abstract

L'invention concerne un procédé de fabrication d'une virole d'un cylindre utilisé dans la fabrication ou le traitement du papier et/ou du carton. Dans ce procédé, une ébauche de virole constituée d'acier est soumise à des traitements thermiques impliquant un chauffage dans des opérations de durcissement, de trempe et de revenu. Selon l'invention, dans un traitement thermique, on effectue une trempe de façon que le durcissement s'opère de manière régulée depuis la surface extérieure de la virole vers l'intérieur. On opère cette trempe de manière qu'un effort de compression ou un effort neutre soit produit à la surface du cylindre, ce qui permet d'empêcher l'apparition d'un effort de tension à la surface dudit cylindre.
PCT/FI2001/000792 2000-09-15 2001-09-12 Procede de fabrication d'une virole d'un cylindre utilise dans la fabrication ou le traitement du papier et/ou du carton Ceased WO2002024964A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
AU2001287766A AU2001287766A1 (en) 2000-09-15 2001-09-12 Method for making a roll shell of a roll used in the manufacture or further processing of paper and/or board
AT01967378T ATE301728T1 (de) 2000-09-15 2001-09-12 Verfahren zur herstellung eines walzenmantels einer bei der herstellung oder weiterverarbeitung von papier und/oder pappe verwendeten walze
EP01967378A EP1379702B1 (fr) 2000-09-15 2001-09-12 Procede de fabrication d'une virole d'un cylindre utilise dans la fabrication ou le traitement du papier et/ou du carton
DE60112618T DE60112618T2 (de) 2000-09-15 2001-09-12 Verfahren zur herstellung eines walzenmantels einer bei der herstellung oder weiterverarbeitung von papier und/oder pappe verwendeten walze
JP2002529556A JP2004510049A (ja) 2000-09-15 2001-09-12 紙及び／又は板紙の製造又は更なる処理において使用されるロールのロールシェルを製造するための方法

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI20002045A FI109720B (fi) 2000-09-15 2000-09-15 Menetelmä paperin ja/tai kartongin valmistuksessa tai jatkokäsittelyssä käytettävän telan telavaipan valmistamiseksi
FI20002045 2000-09-15

Publications (1)

Publication Number Publication Date
WO2002024964A1 true WO2002024964A1 (fr) 2002-03-28

Family

ID=8559096

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI2001/000792 Ceased WO2002024964A1 (fr) 2000-09-15 2001-09-12 Procede de fabrication d'une virole d'un cylindre utilise dans la fabrication ou le traitement du papier et/ou du carton

Country Status (8)

Country Link
US (1) US20020084009A1 (fr)
EP (1) EP1379702B1 (fr)
JP (1) JP2004510049A (fr)
AT (1) ATE301728T1 (fr)
AU (1) AU2001287766A1 (fr)
DE (1) DE60112618T2 (fr)
FI (1) FI109720B (fr)
WO (1) WO2002024964A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004070065A1 (fr) * 2003-02-07 2004-08-19 Metso Paper, Inc. Procede pour le durcissement en surface de cylindres de thermoformage
WO2018072770A1 (fr) * 2016-10-18 2018-04-26 Reifenhäuser GmbH & Co. KG Maschinenfabrik Procédé de fabrication d'un rouleau de lissage, procédé de préparation d'une installation de lissage, rouleau de lissage et installation de lissage

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100463981C (zh) * 2007-04-06 2009-02-25 江苏钢宝轧辊有限公司 锻钢冷轧辊无软带制备方法
CN116121494B (zh) * 2022-11-21 2025-09-09 石钢京诚装备技术有限公司 一种柱钉辊套的热处理方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB906029A (en) * 1957-10-10 1962-09-19 Aei Birlec Ltd A method of and apparatus for quenching heated workpieces
US4444556A (en) * 1981-05-14 1984-04-24 Asea Aktiebolag Cooling apparatus

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1600150A (fr) * 1968-02-15 1970-07-20
JPS5431445B2 (fr) * 1974-02-04 1979-10-06
US4087593A (en) * 1976-03-26 1978-05-02 Dana Corporation Drive shaft assembly and method
JPS6020448B2 (ja) * 1981-05-06 1985-05-22 日本鋼管株式会社 鋼管の焼入装置
JPS61253320A (ja) * 1985-05-07 1986-11-11 Komatsu Ltd 真空焼入れ炉
JPH01108313A (ja) * 1987-10-21 1989-04-25 Mazda Motor Corp 鋳鉄鋳物の製造方法
US5081760A (en) * 1989-06-26 1992-01-21 Hitachi, Ltd. Work roll for metal rolling
FI88420B (fi) * 1991-03-20 1993-01-29 Valmet Paper Machinery Inc Foerfarande foer framstaellning av en vals och en vals
JP3465112B2 (ja) * 1991-10-08 2003-11-10 同和鉱業株式会社 鋼の表面硬化処理法
US6076281A (en) * 1997-03-03 2000-06-20 Valmet Corporation Web finishing section in a paper machine

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB906029A (en) * 1957-10-10 1962-09-19 Aei Birlec Ltd A method of and apparatus for quenching heated workpieces
US4444556A (en) * 1981-05-14 1984-04-24 Asea Aktiebolag Cooling apparatus

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004070065A1 (fr) * 2003-02-07 2004-08-19 Metso Paper, Inc. Procede pour le durcissement en surface de cylindres de thermoformage
GB2410959A (en) * 2003-02-07 2005-08-17 Metso Paper Inc Method for surface hardening of thermo rolls
GB2410959B (en) * 2003-02-07 2006-01-25 Metso Paper Inc Method for surface hardening of thermo rolls
WO2018072770A1 (fr) * 2016-10-18 2018-04-26 Reifenhäuser GmbH & Co. KG Maschinenfabrik Procédé de fabrication d'un rouleau de lissage, procédé de préparation d'une installation de lissage, rouleau de lissage et installation de lissage

Also Published As

Publication number Publication date
JP2004510049A (ja) 2004-04-02
FI20002045L (fi) 2002-03-01
ATE301728T1 (de) 2005-08-15
AU2001287766A1 (en) 2002-04-02
US20020084009A1 (en) 2002-07-04
DE60112618D1 (de) 2005-09-15
FI20002045A0 (fi) 2000-09-15
EP1379702B1 (fr) 2005-08-10
FI109720B (fi) 2002-09-30
EP1379702A1 (fr) 2004-01-14
DE60112618T2 (de) 2006-06-08

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