US3615909A - Method of producing a steel packing strip - Google Patents

Method of producing a steel packing strip Download PDF

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Publication number
US3615909A
US3615909A US778074A US3615909DA US3615909A US 3615909 A US3615909 A US 3615909A US 778074 A US778074 A US 778074A US 3615909D A US3615909D A US 3615909DA US 3615909 A US3615909 A US 3615909A
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US
United States
Prior art keywords
quenching
process according
steel
strip
tensile strength
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
US778074A
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English (en)
Inventor
Hans-Wilhelm Grasshoff
Horst Turck
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HOESCH AG HAUPTVERWALTUNG
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HOESCH AG HAUPTVERWALTUNG
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Publication of US3615909A publication Critical patent/US3615909A/en
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    • 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
    • C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
    • C21D9/54—Furnaces for treating strips or wire
    • C21D9/56—Continuous furnaces for strip or wire
    • C21D9/60—Continuous furnaces for strip or wire with induction heating
    • 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
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
    • C21D8/0273—Final recrystallisation annealing
    • 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
    • C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
    • 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
    • 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
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
    • C21D8/0252—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment with application of tension
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/25—Process efficiency

Definitions

  • ABSTRACT A steel packing strip with a tensile strength of around 95 to 125 kp./mm. an elongation of 85 of 10 to 17 percent and a yield point ratio of 0.7 to 0.9 is produced from rolled steel strip with a thickness of 0.30 to 1.3 mm. and a composition of about 0.10 to 0.20% C, at most 0.50% Si, possibly as much as 0.060% of P and S, 0.3% to 1% Mn, and the balance substantially all iron which is subjected to a continuous austenitizing annealing at a temperature of more than 820 C. and thereafter quenched in water to produce a structure with discrete particles of stress-laden ferrite.
  • the invention relates to a process for producing a steel packing strip of high strength with a tensile strength of about 95 to 125 kp./mm. an elongation 85 of to 17 percent and a yield point ratio of 0.7 to 0.9.
  • the Prior Art It is known to produce packing strip with a tensile strength of less than 95 kp./mm. by the relaxation and recovery annealing of cold rolled strip of a steel of the type of DIN 1624, as well as undeoxiclized, half-deoxidized, or completely deoxidized structural steel with additives corresponding to DIN 17100 with the desired tensile strength value.
  • the relaxation and recovery annealing can be carried out in continuous, pot or cupola annealing ovens.
  • a disadvantage of packing strips with a tensile strength of less than 95 kp./mm. is that they require a quite large cross section and for the same reason also are of substantial weight, in order to have adequate packing characteristics.
  • the disadvantage in the production of packing strips with a tensile strength of more than 95 kp./mm. is that two heat treatments are required.
  • the purpose of the present invention is to overcome these disadvantages in the known process for the production of packing strips and to produce a packing strip which has a tensile strength of 95 to 125 kp./mm. an elongation85 of 10 to 17 percent and a yield point ratio of 0.70 to 0.90 and to provide a simple procedure by which this can be done with only one heat treatment.
  • the quenching can advantageously be carried out also by means of cooled, for example, water-cooled, quenching plates, or by quenching rolls, because in this way an especially flat and strain-free product is obtained.
  • cooled for example, water-cooled, quenching plates, or by quenching rolls, because in this way an especially flat and strain-free product is obtained.
  • a protective gas in the heating zone it is further possible to obtain a completely scaleand tarnish-free surface.
  • the austenitizing annealing In order to avoid the formation of a thicker scale layer on the steel band by the austenitizing annealing, according to the invention it is proposed to carry out the annealing by direct current heating, inductive or resistance heating in as short as possible a space of time.
  • the layer of scale produced by the heating on the band can then be completely cracked off by the subsequent quenching.
  • the thickness of the scale layer By changing the length of the passage of the band being annealed through air, the thickness of the scale layer can be so controlled that upon dipping in water it cracks completely off and a clean contact surface for example by resistance heating is assured.
  • gas or electrically heated annealing ovens as well as when using induction or resistance heating it is advantageous to use a neutral protective gas for the austenitizing annealing.
  • it is proposed to carry out the quenching operation under tension which is accomplished by the use of plain or S-shaped rolls arranged in a water bath.
  • the procedure of the invention is carried out advantageously by quenching or produce a higher tensile strength than is required and thereafter allowing the band to dry. In this way, the required tensile strength of the band at the end of the treatment can be kept exact.
  • the quenching in water can be carried out in a single width or in several widths.
  • a subsequent splitting of arrow strips is made possible by the mechanical characteristics set out above.
  • several narrow strips can be produced simultaneously by the provision of corresponding reels.
  • the aforesaid mechanical characteristics of the packing strip are achieved through the production of a structure of stress-laden ferrite.
  • the relation of the carbon content to the manganese content is determined depending on the speed of quenching.
  • a carbon content of 0.10 to 0.12 percent with a manganese content of 0.40 to 0.60 percent is enough to produce drastically stress-laden ferrite in the steel band, If the quenching is carried out in more or less cold water between room temperature and 100 C., that is, with a correspondingly reduced quenching intensity, the carbon content must lie at about 0.20 percent and the manganese about 1 percent.
  • the mechanical characteristics can be kept in the desired ranges through an exchange of manganese through the carbon or of carbon through the manganese.
  • the advantages gained with the process according to the invention lie particularly in the fact that in contrast to the known packing bands with a tensile strength of less than kp./mm., the new packing band can be loaded more highly and besides in contrast to the packing band of the intermediate stage structure the same mechanical characteristics are obtained with only one heat treatment.
  • a cold rolled steel strip 2 of about 0.30 to 1.30 mm. thickness which is welded to the preceding steel strip 3 by means of a welding machine 4 for continuous operation, is rolled off and is passed through an austenitizing arrangement 5 over bending roller 6 through a water bath 7 and the reel 8. It is further advantageous between the outlet of the water bath and the wound-up reel 8 to provide an arrangement 10 for drying and/or annealing of the band and a lacquerring arrangement ll.
  • composition includes up to 0.60 percent P and S.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Heat Treatment Of Sheet Steel (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)
US778074A 1967-11-23 1968-11-22 Method of producing a steel packing strip Expired - Lifetime US3615909A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1608164 1967-11-23

Publications (1)

Publication Number Publication Date
US3615909A true US3615909A (en) 1971-10-26

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Application Number Title Priority Date Filing Date
US778074A Expired - Lifetime US3615909A (en) 1967-11-23 1968-11-22 Method of producing a steel packing strip

Country Status (6)

Country Link
US (1) US3615909A (fr)
BE (1) BE724161A (fr)
DE (1) DE1608164B1 (fr)
FR (1) FR1592914A (fr)
GB (1) GB1223766A (fr)
SE (1) SE352106B (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5830291A (en) * 1996-04-19 1998-11-03 J&L Specialty Steel, Inc. Method for producing bright stainless steel
WO2000052965A2 (fr) * 1999-03-01 2000-09-08 Avestapolarit Aktiebolag (Publ) Procede permettant de chauffer une bande metallique et appareil correspondant
CN106566992A (zh) * 2016-10-27 2017-04-19 唐山钢铁集团有限责任公司 950MPa级别高强冷轧捆带钢及其制备方法
CN108570592A (zh) * 2018-04-27 2018-09-25 唐山不锈钢有限责任公司 Tkdc捆带用热轧带钢及其生产方法
CN114645187A (zh) * 2022-01-29 2022-06-21 安阳钢铁股份有限公司 一种非调质950MPa级高强捆带钢及其生产方法

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5551410B2 (fr) * 1974-01-31 1980-12-24
AU530384B2 (en) * 1979-06-28 1983-07-14 Nippon Kokan Kabushiki Kaisha Controlled cooling of steel strip to effect continuous annealing
AU671246B2 (en) * 1994-04-28 1996-08-15 Illinois Tool Works Inc. Method and apparatus for an improved steel strap
DE102016000576A1 (de) * 2016-01-22 2017-07-27 Wsp Gmbh Verfahren zum kontinuierlichen Glühen und Abschrecken von Bändern aus metallischen Werkstoffen und Vorrichtung zur Durchführung des Verfahrens

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE412852C (de) * 1923-06-26 1925-05-01 Friedrich Boecker Ph S Sohn Verfahren zum Haerten und Vergueten von Stahldraht, Stahlband u. dgl.
GB1148912A (en) * 1965-05-10 1969-04-16 Ass Elect Ind Improvements relating to the heat treatment of steel sheet and strip

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5830291A (en) * 1996-04-19 1998-11-03 J&L Specialty Steel, Inc. Method for producing bright stainless steel
WO2000052965A2 (fr) * 1999-03-01 2000-09-08 Avestapolarit Aktiebolag (Publ) Procede permettant de chauffer une bande metallique et appareil correspondant
WO2000052965A3 (fr) * 1999-03-01 2000-12-28 Avesta Sheffield Aktiebolag Pu Procede permettant de chauffer une bande metallique et appareil correspondant
US6608290B1 (en) 1999-03-01 2003-08-19 Avesta Sheffield Aktiebolag Method of heating metal strip and apparatus thereof
CN106566992A (zh) * 2016-10-27 2017-04-19 唐山钢铁集团有限责任公司 950MPa级别高强冷轧捆带钢及其制备方法
CN108570592A (zh) * 2018-04-27 2018-09-25 唐山不锈钢有限责任公司 Tkdc捆带用热轧带钢及其生产方法
CN108570592B (zh) * 2018-04-27 2019-08-09 唐山不锈钢有限责任公司 Tkdc捆带用热轧带钢及其生产方法
CN114645187A (zh) * 2022-01-29 2022-06-21 安阳钢铁股份有限公司 一种非调质950MPa级高强捆带钢及其生产方法

Also Published As

Publication number Publication date
SE352106B (fr) 1972-12-18
DE1608164B1 (de) 1971-11-11
BE724161A (fr) 1969-05-20
FR1592914A (fr) 1970-05-19
GB1223766A (en) 1971-03-03

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