US20070248484A1 - Steel Shell for a Suction Roll and a Method of Producing a Steel Product - Google Patents

Steel Shell for a Suction Roll and a Method of Producing a Steel Product Download PDF

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Publication number
US20070248484A1
US20070248484A1 US11/574,266 US57426605A US2007248484A1 US 20070248484 A1 US20070248484 A1 US 20070248484A1 US 57426605 A US57426605 A US 57426605A US 2007248484 A1 US2007248484 A1 US 2007248484A1
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United States
Prior art keywords
steel
suction roll
austenite
roll shell
steel contains
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Abandoned
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US11/574,266
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English (en)
Inventor
Mats Liljas
Pelle Johansson
Conny Bergkvist
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.)
Outokumpu Oyj
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Outokumpu Oyj
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Assigned to OUTOKUMPU OYJ reassignment OUTOKUMPU OYJ ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BERGKVIST, CONNY, JOHANSSON, PELLE, LILJAS, MATS
Publication of US20070248484A1 publication Critical patent/US20070248484A1/en
Abandoned legal-status Critical Current

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    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/48—Suction apparatus
    • D21F1/50—Suction boxes with rolls
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/001—Ferrous alloys, e.g. steel alloys containing N
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/004—Very low carbon steels, i.e. having a carbon content of less than 0,01%
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/34—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of silicon
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/48—Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/52—Ferrous alloys, e.g. steel alloys containing chromium with nickel with cobalt
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/58—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F3/00—Press section of machines for making continuous webs of paper
    • D21F3/02—Wet presses
    • D21F3/10—Suction rolls, e.g. couch rolls
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F3/00—Press section of machines for making continuous webs of paper
    • D21F3/02—Wet presses
    • D21F3/10—Suction rolls, e.g. couch rolls
    • D21F3/105—Covers thereof

Definitions

  • the invention relates to a steel shell for a suction roll and a method of producing a steel product, in which method a piece of steel material is worked by a cutting operation such as milling, turning and/or drilling.
  • Stainless steel is used in fields in which a high corrosion resistance is necessary.
  • a high corrosion resistance may be required in environments within off-shore, paper and pulp industry and chemical industry.
  • suction roll shells for paper machines that are manufactured from stainless steel.
  • One type of stainless steel is the so called duplex steels that contain ferrite and austenite.
  • Duplex steels are known to combine a high mechanical strength and toughness with a good corrosion resistance, in particular in terms of stress corrosion and corrosion fatigue. For corrosion resistance as well as mechanical properties such as weldability, it is important that the steel is well balanced in terms of the essential components austenite and ferrite. In modem development of duplex steels, it is desired to have a micro-structure containing 35-65% ferrite, the remainder being austenite.
  • duplex steels are increasingly competing with traditional austenite stainless steels.
  • Such a steel material is described in published U.S. patent application Ser. No. 2003/0172999.
  • the steel material described in this publication is a ferrite-austenite stainless steel having a micro-structure essentially consisting of 35-65% by volume ferrite and 35-65% by volume austenite.
  • the steel in question has a chemical composition containing 0.005-0.07 C, 0.1-2.0 Si, 3-8 Mn, 19-23 Cr, 0.15-0.30 N och 0.5-1.7 Ni, in % by weight. Some other components may also be included.
  • Nitrogen is of considerable importance to the steel described in US 2003/0172999, since nitrogen is dominant as austenite former and contributes to the strength of the steel as well as to its corrosion resistance. For this reason, it was estimated that the nitrogen content of the steel should be in the range of 0.15-0.30%, and preferably in the range of 0.20-0.24%. However, it has been previously shown that steel types of such a high nitrogen content are poor in cuttability.
  • a stainless steel intended to be used for a particular product must be subjected to some type of cutting operation, such as milling, turning or drilling.
  • austenite and duplex stainless steels are poor in cuttability and hence various measures are undertaken in order to increase cuttability of the stainless steel.
  • nitrogen in stainless steel decreases cuttability.
  • U.S. Pat. No. 4,769,213 a method is suggested for increasing cuttability of a martensite stainless steel by reducing carbon and nitrogen contents such that the total content of carbon and nitrogen together is not more than 0.05% by weight.
  • martensite steels have a poorer corrosion resistance.
  • austenite stainless steels For austenite stainless steels, it is suggested in U.S. Pat. No. 5,482,674 that the content of carbon and nitrogen should be reduced such that neither the content of carbon nor the content of nitrogen is more than about 0.035% by weight. It is also known that the addition of sulphur may increase cuttability. Accordingly, U.S. Pat. No. 4,784,828 suggests that sulphur should be added to an austenite stainless steel in order to increase cuttability. It is also stated that the contents of carbon and nitrogen should be very low, in total up to 0.065% by weight. However, compared with duplex steels, austenite steels have a lower strength.
  • a stainless steel suitable for a suction roll shell should be of martensite type, among other things containing carbon at a % by weight of more than 0 but not more than 0.06, silicon at a % by weight above 0 but not more than 2, manganese at a % by weight above 0 but not more than 2, nickel at 3-6% by weight, chromium at 14-17% by weight, molybdenum at 1-3% by weight and copper at a % by weight of from 0.5 to 1.5.
  • the present invention aims at providing a solution to the problem of finding a steel material that exhibits a high strength as well as a good corrosion resistance, and that moreover is suitable for cutting operations without having to be subjected to sulphur addition treatment. It is also an object of the invention to provide a suction roll shell with good corrosion resistance, which is easy to manufacture by cutting operations.
  • a steel material of the type described in above mentioned US 2003/0172999 not only has a high strength and a good corrosion resistance, but that the material in question also is suitable for cutting operations such as turning, milling and drilling, without the material in question having been treated by addition of sulphur.
  • the inventors have also found that the material in question is particularly suitable as a material for paper machine suction rolls, and that it is advantageous to manufacture a suction roll shell of such a material.
  • the invention relates to a suction roll shell of this material.
  • the invention can also be understood as a method for cutting operations, in particular when manufacturing suction roll shells, but also in manufacturing of other products, e.g. rotating machine parts, such as shafts.
  • the invention can also be defined in terms of a use of said steel as a workpiece in cutting operation of steel.
  • the suction roll shell according to the invention is made of a stainless ferrite-austenite steel having a micro-structure essentially consisting of 35-65% by volume of ferrite and 35-65% by volume of austenite.
  • the steel composition will be described in greater detail in the detailed description.
  • the invention also relates to a suction roll comprising the inventive suction roll shell.
  • the cutting operation comprises drilling of at least one through hole, and preferably drilling of a plurality of holes.
  • the method comprises drilling of hundreds of thousands of holes. A corresponding drilled length is several kilometres.
  • the cutting operation may also comprise turning of outside and inside faces of the shell.
  • FIG. 1 shows the bending of a blank for a suction roll shell.
  • FIG. 2 shows a blank having been bent and welded together to form a shell.
  • FIG. 3 shows schematically a first step of working the shell shown in FIG. 2 .
  • FIG. 4 shows a second step of working the shell.
  • FIG. 5 shows a completed suction roll shell.
  • FIGS. 6-9 show the result of comparative tests in which the steel used according to the invention is compared with other steels in terms of cuttability.
  • FIG. 1 a first step in the manufacturing of a suction roll shell is shown.
  • an essentially planar blank 1 is roller bent between two rollers 2 , 3 , as is known as such and need not be described in greater detail herein.
  • the ends of the blank 1 are welded together such that a weld joint unites the blank 1 to form a segment 9 .
  • a plurality of segments are then united by circular joints to form a shell that is heat treated after the welding.
  • FIG. 3 shows how the thus achieved shell 9 can be subjected to a working operation, such as turning.
  • FIG. 1 shows how the thus achieved shell 9 can be subjected to a working operation, such as turning.
  • FIG. 3 shows a turning tool 5 acting on the face of the shell 9 .
  • the object of the turning operation is to ensure that the face of the shell 9 is smooth and regular.
  • FIG. 4 shows schematically a subsequent step in the manufacturing process, in which the shell 9 is drilled by a drill 6 , whereby the shell is provided with a number of through holes 7 .
  • FIG. 5 shows the completed suction roll shell 8 with its circular cylindrical shell 9 and the through holes 7 thereof.
  • FIG. 5 also shows schematically that the ends of the suction roll shell 8 can be closed by side covers 10 .
  • a vacuum source not shown
  • Suction roll shells have previously been manufactured from a material sold under the name 3RE60 Avesta SRG.
  • This steel is a stainless ferrite-austenite steel that has been improved in respect of cuttability by sulphur treatment and that has the following typical composition in % by weight.
  • steel 3RE60 has been used for about 30 years for the manufacturing of suction roll shells, and about 10 years ago it was provided with an additive for improved cuttability and its name was changed to 3RE60 SRG.
  • the steel is called 3RE60 Avesta SRG.
  • This steel has a microstructure essentially consisting of 35-65% by volume of ferrite and 35-65% by volume of austenite, and its chemical composition contains in % by weight: C 0.005 Si 0.1-2.0 Mn 3-8 Cr 19-23 Ni 0.5-1.7 N 0.15-0.3
  • a steel that is particularly suitable for this application suitably contains: optionally Mo and/or W at a total content of no more than 1.0 (Mo+W/2), optionally Cu up to a maximum of 1.0 Cu, balance being iron and impurities.
  • Mo+W/2 a total content of no more than 1.0
  • Cu a maximum of 1.0 Cu
  • balance iron and impurities.
  • the steel contains 0.02-0.05 C.
  • the steel contains 0.18-0.26 N and advantageously 20-23 Cr.
  • the steel contains 0.8-1.70 Ni, and even more preferred 1.35-1.7 Ni.
  • the steel contains 0.22 N, 21.5 Cr, 1.5 Ni, 0.3 Mo, 5 Mn and not more than 0.04 C.
  • a steel is sold by Outokumpu Stainless AB, Box 74, SE-774 22, AVESTA.
  • This steel is sold by Outokumpu under the name LDX 2101®.
  • the name is a trademark registered in the European Union.
  • the LDX 2101® steel is particularly suitable to be used in a suction roll shell.
  • Particularly suitable contents of copper and silicon are 0.3 Cu and 0.7 Si, respectively.
  • the guideline values 0.3 Cu and 0.7 Si (in % by weight) are used for LDX 2101®.
  • the steel of the type mentioned above has a relatively high nitrogen content. As it is known that nitrogen tends to impair cuttability, it would be expected that cuttability is poorer. However, it has been surprisingly shown that the cuttability of the steel used according to the present invention is considerably higher than expected.
  • FIG. 6 shows the results of a comparative test in which an LDX 2101® steel were compared with two other, cuttability-improved, austenite steels called 304L PRODEC® and 316L PRODEC®, respectively.
  • the steel 304L PRODEC® has the following composition in % by weight: C 0.02 Si 0.5 Mn 1.5 Cr 18.2 Ni 8.4 Mo essentially none N 0.07 S 0.02
  • the steel 316L PRODEC® has the following composition: C 0.02 Si 0.5 Mn 1.5 Cr 17.2 Ni 11.2 Mo 2.3 N 0.05 S 0.02
  • FIG. 7 shows the results of an additional comparative test between an LDX 2101® steel and steels 304L PRODEC® and 316L PRODEC®.
  • FIG. 7 shows a test with a working time of 15 minutes, in which turning was made by a cutting edge of hard metal. Under these circumstances, a cutting speed was achieved for an LDX 2102® steel that was somewhat lower in comparison with the other two steels. The difference is however marginal.
  • FIG. 8 shows another test in which the steel LDX 2101® is compared with a conventional duplex steel sold under the name 2205.
  • This steel which is more highly alloyed than LDX 2101®, is standardized (EN 1.4462) and is used in a great number of applications. It has no cuttability-improving additives and is not used for this type of suction roll shells.
  • 2205 has the following composition: C 0.02 Si 0.4 Mn 1.5 Cr 22.2 Ni 5.7 Mo 3.1 N 0.17 S 0.001
  • FIG. 9 yet another test is shown in FIG. 9 .
  • an LDX 2101® steel was compared with three other steel types used for suction roll shells, i.e. 2304 Avesta SRG, 3RE60 Avesta SRG and 2205 Avesta SRG. All steels designated SRG (Suction Roll Grade) are cuttability-improved by sulphur addition.
  • the steel 2304 Avesta SRG has the following typical composition: C 0.02 Si 0.8 Mn 1.5 Cr 22.7 Ni 4.7 Mo 0.3 N 0.09 S 0.02
  • the steel 2205 Avesta SRG has the following typical composition: C 0.017 Si 0.6 Mn 1.35 Cr 22.0 Ni 5.7 Mo 2.9 N 0.13 S 0.02
  • the advantage is obtained, among other things, that the completed roll shell achieves a very good corrosion resistance.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Paper (AREA)
  • Rolls And Other Rotary Bodies (AREA)
  • Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
  • Coating With Molten Metal (AREA)
  • Heat Treatment Of Articles (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
  • Compressor (AREA)
  • Adjustment And Processing Of Grains (AREA)
US11/574,266 2004-09-07 2005-08-19 Steel Shell for a Suction Roll and a Method of Producing a Steel Product Abandoned US20070248484A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SE0402141-6 2004-09-07
SE0402141A SE528375C2 (sv) 2004-09-07 2004-09-07 En sugvalsmantel av stål samt en metod för tillverkning av en sugvalsmantel
PCT/SE2005/001220 WO2006041344A1 (en) 2004-09-07 2005-08-19 A steel shell for a suction roll and a method of producing a steel product

Related Parent Applications (1)

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PCT/SE2005/001220 A-371-Of-International WO2006041344A1 (en) 2004-09-07 2005-08-19 A steel shell for a suction roll and a method of producing a steel product

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US14/719,760 Continuation US20150252529A1 (en) 2004-09-07 2015-05-22 Steel shell for a suction roll and a method of producing a steel product

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US11/574,266 Abandoned US20070248484A1 (en) 2004-09-07 2005-08-19 Steel Shell for a Suction Roll and a Method of Producing a Steel Product
US14/719,760 Abandoned US20150252529A1 (en) 2004-09-07 2015-05-22 Steel shell for a suction roll and a method of producing a steel product

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US (2) US20070248484A1 (zh)
EP (1) EP1786975B1 (zh)
JP (1) JP4758430B2 (zh)
KR (1) KR20070110246A (zh)
CN (2) CN101018908B (zh)
AT (1) ATE444394T1 (zh)
BR (1) BRPI0514969B1 (zh)
CA (1) CA2584275C (zh)
DE (1) DE602005016943D1 (zh)
EA (1) EA010540B1 (zh)
ES (1) ES2333737T3 (zh)
PL (1) PL1786975T3 (zh)
SE (1) SE528375C2 (zh)
SI (1) SI1786975T1 (zh)
TW (1) TWI393788B (zh)
WO (1) WO2006041344A1 (zh)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2279276A1 (en) 2008-05-16 2011-02-02 Outokumpu Oyj Stainless steel product, use of the product and method of its manufacture
CN111910117A (zh) * 2020-07-15 2020-11-10 丁国旺 一种熔炼高强度不锈钢的碳、氮合金化的方法

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FI121340B (fi) * 2008-12-19 2010-10-15 Outokumpu Oy Dupleksinen ruostumaton teräs
CN102864381A (zh) * 2012-09-05 2013-01-09 陈敏 一种低镍不锈钢合金材料
CN102864385A (zh) * 2012-09-05 2013-01-09 忻峰 一种低镍不锈钢合金
CN102851618A (zh) * 2012-09-05 2013-01-02 徐琼 低镍不锈钢合金材料及制备方法
CN102864386A (zh) * 2012-09-05 2013-01-09 陈敏 一种低镍不锈钢合金材料及制备方法
CN102864380A (zh) * 2012-09-05 2013-01-09 忻峰 一种低镍不锈钢合金及制备方法
CN102851602A (zh) * 2012-09-05 2013-01-02 徐琼 低镍不锈钢合金材料
FI125734B (en) 2013-06-13 2016-01-29 Outokumpu Oy Duplex ferritic austenitic stainless steel
JP6520327B2 (ja) * 2015-04-08 2019-05-29 株式会社大林組 セグメント用継手金具の製造方法およびセグメント用継手金具
CN110270798B (zh) * 2019-06-27 2020-09-29 福建维普斯厨卫科技有限公司 一种包括圆柱体卫浴主体的多功能龙头的生产工艺
CN113025891B (zh) * 2021-02-08 2022-07-22 江阴兴澄特种钢铁有限公司 一种双相不锈钢s32101钢板及其制造方法

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