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EP0172544A3 - Process for manufacturing rolled steel products, in particular helically ribbed prestressed steel rods - Google Patents

Process for manufacturing rolled steel products, in particular helically ribbed prestressed steel rods Download PDF

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Publication number
EP0172544A3
EP0172544A3 EP85110316A EP85110316A EP0172544A3 EP 0172544 A3 EP0172544 A3 EP 0172544A3 EP 85110316 A EP85110316 A EP 85110316A EP 85110316 A EP85110316 A EP 85110316A EP 0172544 A3 EP0172544 A3 EP 0172544A3
Authority
EP
European Patent Office
Prior art keywords
steel
content
martensite
rods
tension
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.)
Granted
Application number
EP85110316A
Other languages
German (de)
Other versions
EP0172544B2 (en
EP0172544A2 (en
EP0172544B1 (en
Inventor
& Widmann Aktiengesellschaft Dyckerhoff
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.)
dywidag-Systems International GmbH
Stahlwerk Annahutte Max aicher & Cokg GmbH
Original Assignee
Dyckerhoff and Widmann AG
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6243708&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0172544(A3) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Dyckerhoff and Widmann AG filed Critical Dyckerhoff and Widmann AG
Priority to AT85110316T priority Critical patent/ATE49779T1/en
Publication of EP0172544A2 publication Critical patent/EP0172544A2/en
Publication of EP0172544A3 publication Critical patent/EP0172544A3/en
Application granted granted Critical
Publication of EP0172544B1 publication Critical patent/EP0172544B1/en
Publication of EP0172544B2 publication Critical patent/EP0172544B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/06—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires
    • C21D8/08—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires for concrete reinforcement
    • 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
    • C21D1/19—Hardening; Quenching with or without subsequent tempering by interrupted quenching
    • 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
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S148/00—Metal treatment
    • Y10S148/902—Metal treatment having portions of differing metallurgical properties or characteristics
    • 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
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S148/00—Metal treatment
    • Y10S148/902—Metal treatment having portions of differing metallurgical properties or characteristics
    • Y10S148/907—Threaded or headed fastener

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Physics & Mathematics (AREA)
  • Manufacturing & Machinery (AREA)
  • Heat Treatment Of Steel (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)
  • Heat Treatment Of Articles (AREA)
  • Rod-Shaped Construction Members (AREA)
  • Metal Rolling (AREA)
  • Laminated Bodies (AREA)
  • Coating With Molten Metal (AREA)

Abstract

To produce threaded steel tension members, steel is used with a C-content of 0.50 to 0.80%, preferably 0.75%, a Si-content of 0.20 to 0.50%, preferably 0.25%, and a Mn content of 0.30 to 0.80%, preferably 0.60%. Exiting from the rolling heat at the outlet side of the finishing stand after hot rolling, the tension member or rod is subjected to surface quenching by a cooling medium, preferably water, so that the steel in a rim zone R1 is transformed immediately and completely into martensite, while the heat content remaining in the core zone K1 does not effect a tempering of the martensite rim zone during the subsequent cooling beyond the range of the intermediate stage. Steel tension members of this type have a high ductility and toughness at a high yield limit and high strength, they are corrosion-resistant to a great degree and have a wear resistant surface which makes them particularly suitable for threaded tension rods in which the threads are produced either by a cold forming operation or hot rolled ribs.
EP85110316A 1984-08-23 1985-08-17 Process for heat treating hot rolled steel rod or wire for prestressing concrete Expired - Lifetime EP0172544B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85110316T ATE49779T1 (en) 1984-08-23 1985-08-17 PROCESS FOR THE MANUFACTURE OF ROLLED STEEL PRODUCTS, IN PARTICULAR SCREWABLE PRE-STEELS OR THE LIKE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3431008A DE3431008C2 (en) 1984-08-23 1984-08-23 Heat treatment of hot rolled bars or wires
DE3431008 1984-08-23

Publications (4)

Publication Number Publication Date
EP0172544A2 EP0172544A2 (en) 1986-02-26
EP0172544A3 true EP0172544A3 (en) 1987-10-28
EP0172544B1 EP0172544B1 (en) 1990-01-24
EP0172544B2 EP0172544B2 (en) 1996-06-05

Family

ID=6243708

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85110316A Expired - Lifetime EP0172544B2 (en) 1984-08-23 1985-08-17 Process for heat treating hot rolled steel rod or wire for prestressing concrete

Country Status (10)

Country Link
US (1) US4877463A (en)
EP (1) EP0172544B2 (en)
JP (1) JPH0660350B2 (en)
AT (1) ATE49779T1 (en)
AU (1) AU565805B2 (en)
BR (1) BR8504032A (en)
CA (1) CA1268957A (en)
DE (2) DE3431008C2 (en)
ES (1) ES8609490A1 (en)
ZA (1) ZA856448B (en)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3431008C2 (en) 1984-08-23 1986-10-16 Dyckerhoff & Widmann AG, 8000 München Heat treatment of hot rolled bars or wires
DE3631928C2 (en) * 1986-09-19 1994-06-09 Aicher Max Process for the production of rolled steel products
DE3730490A1 (en) * 1987-09-11 1989-03-23 Dyckerhoff & Widmann Ag HOT ROLLED CONCRETE REINFORCING BAR, PARTICULARLY CONCRETE RIB BAR
DE3730489A1 (en) * 1987-09-11 1989-03-30 Dyckerhoff & Widmann Ag CONCRETE REINFORCEMENT BAR, PARTICULAR CONCRETE RIB BAR
DE4224222A1 (en) * 1992-07-22 1994-01-27 Inst Stahlbeton Bewehrung Ev Structural steel, in particular rebar and process for its manufacture
GB9310854D0 (en) * 1993-05-26 1993-07-14 Asw Ltd Steel bars and rods and manufacturing process
DE29709213U1 (en) * 1997-05-26 1998-09-24 MiTek Industries GmbH, 63128 Dietzenbach Tensioning or fastening screw, in particular pipe screw
CA2292166A1 (en) 1999-01-13 2000-07-13 Kent B. Godsted Chemically coated fasteners having improved penetration and withdrawal resistance
US6109851A (en) * 1999-01-13 2000-08-29 Illinois Tool Works Inc. Screws having selected heat treatment and hardening
US6086305A (en) 1999-01-13 2000-07-11 Illinois Tool Works Inc. Nails having selected heat treatment and hardening
DE19921286A1 (en) * 1999-05-07 2000-11-09 Sms Demag Ag Heat treatment process for the production of surface-hardened long and flat products from unalloyed or low-alloy steels
ITMI20031031A1 (en) * 2003-05-22 2004-11-23 Danieli Off Mecc METALLIC SPOOLING METHOD IN BAR.
US7624556B2 (en) 2003-11-25 2009-12-01 Bbv Vorspanntechnik Gmbh Threaded deformed reinforcing bar and method for making the bar
US8997420B2 (en) * 2004-11-29 2015-04-07 Victor Amend Reinforced insulated forms for constructing concrete walls and floors
CN1327008C (en) * 2005-07-07 2007-07-18 东北大学 Post rolling fast cooling-production technology of high strength ribbed reinforced bar
DE202010006059U1 (en) * 2010-04-23 2010-07-22 Stahlwerk Annahütte Max Aicher GmbH & Co KG threaded rod
AU2013205904B2 (en) * 2012-05-17 2017-12-07 Woodstock Percussion Pty Ltd Full Strength Threaded Bar
CH707301B1 (en) * 2013-04-08 2014-06-13 Empa Method for creating prestressed concrete structures by means of profiles of a shape memory alloy and structure, produced by the process.
CZ307645B6 (en) * 2017-02-15 2019-01-30 Západočeská Univerzita V Plzni Method of manufacturing steel parts

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH364886A (en) * 1958-08-13 1962-10-15 Dyckerhoff & Widmann Ag Reinforcing bar for prestressed concrete
DE1913758A1 (en) * 1968-03-18 1969-10-09 United States Steel Corp Cold drawn wires from hot rolled steel bar and process for their manufacture
DE2163163B2 (en) * 1971-12-20 1972-11-30 Fried. Krupp Hüttenwerke AG, 4630 Bochum High strength steel - for wire having a sorbitic structure
DE2439784A1 (en) * 1973-09-24 1975-04-03 Qualitaets Und Edelstahl Kom V Concrete reinforcing rods - are quenched after hot rolling and profiling
BE874535A (en) * 1979-02-28 1979-06-18 Centre Rech Metallurgique PROCESS FOR MANUFACTURING HIGH ELASTIC LIMIT STEEL LAMINATED PRODUCTS
DE3131078C1 (en) * 1981-08-06 1982-10-28 Dyckerhoff & Widmann AG, 8000 München Anchoring or connecting body for steel bars having surface profilings in the form of ribs

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE137729C (en) *
DE2353034B2 (en) * 1972-10-31 1980-03-13 Centre De Recherches Metallurgiques- Centrum Voor Research In De Metallurgie, Bruessel Process for improving the mechanical strength values of rolled steel products
BE790867A (en) * 1972-10-31 1973-02-15 Centre Rech Metallurgique PROCESS FOR IMPROVING THE QUALITY OF LAMINATED PRODUCTS, SUCH AS ROUND OR CONCRETE BARS, MACHINE WIRE, ETC ....
FR2238768A1 (en) * 1973-07-23 1975-02-21 Sgtm Thermo-mechanical treatment of austenitic steel - followed by controlled quenching giving mech props similar to expensive alloys
US4180418A (en) * 1973-09-11 1979-12-25 Stahlwerke Peine-Salzgitter A.G. Method of making a steel wire adapted for cold drawing
IT1090143B (en) * 1975-01-29 1985-06-18 Centre Rech Metallurgique PROCESS FOR MANUFACTURING LAMINATED STEEL PRODUCTS
NL7610472A (en) * 1975-09-30 1977-04-01 Arbed PROCESS FOR TREATMENT OF ROLLED STEEL.
IT1107284B (en) * 1977-05-13 1985-11-25 Centre Rech Metallurgique PROCEDURE FOR THE PRODUCTION OF IMPROVED QUALITY STEEL PROFILES
GB1576944A (en) 1977-06-20 1980-10-15 British Steel Corp Production of steeel rod or bar
GB1587215A (en) * 1977-11-03 1981-04-01 British Steel Corp Manufacture of welded steel mesh
ES470858A1 (en) 1977-06-20 1979-10-01 British Steel Corp Welded steel rod grid prodn. for use as concrete reinforcement - by hot rolling steel into rod, water cooling, air cooling to temper the surface and welding to form grid
FR2405998A1 (en) * 1977-10-14 1979-05-11 Centre Rech Metallurgique IMPROVEMENTS IN PROCESSES FOR TREATING TUBULAR STEEL PROFILES
DE2900271C2 (en) 1979-01-05 1984-01-26 Stahlwerke Peine-Salzgitter Ag, 3150 Peine Weldable reinforcing steel and process for its manufacture
DE2916218A1 (en) * 1979-04-21 1980-10-23 Florin Stahl Walzwerk Rolled steel prods. with multilayer microstructure - where prod. leaving hot rolling mill is quenched intermittently to obtain several layers of tempered martensite
DE3431008C2 (en) 1984-08-23 1986-10-16 Dyckerhoff & Widmann AG, 8000 München Heat treatment of hot rolled bars or wires

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH364886A (en) * 1958-08-13 1962-10-15 Dyckerhoff & Widmann Ag Reinforcing bar for prestressed concrete
DE1913758A1 (en) * 1968-03-18 1969-10-09 United States Steel Corp Cold drawn wires from hot rolled steel bar and process for their manufacture
DE2163163B2 (en) * 1971-12-20 1972-11-30 Fried. Krupp Hüttenwerke AG, 4630 Bochum High strength steel - for wire having a sorbitic structure
DE2439784A1 (en) * 1973-09-24 1975-04-03 Qualitaets Und Edelstahl Kom V Concrete reinforcing rods - are quenched after hot rolling and profiling
BE874535A (en) * 1979-02-28 1979-06-18 Centre Rech Metallurgique PROCESS FOR MANUFACTURING HIGH ELASTIC LIMIT STEEL LAMINATED PRODUCTS
DE3131078C1 (en) * 1981-08-06 1982-10-28 Dyckerhoff & Widmann AG, 8000 München Anchoring or connecting body for steel bars having surface profilings in the form of ribs

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
IRON AND STEEL ENGINEER, Band 61, Nr. 3, März 1984, Seiten 53-57, Pittsburgh, Pennsylvania, US; P. SIMON et al.: "Tempcore: a new process for the production of high-quality reinforcing bars" *

Also Published As

Publication number Publication date
AU565805B2 (en) 1987-10-01
CA1268957A (en) 1990-05-15
DE3431008C2 (en) 1986-10-16
BR8504032A (en) 1986-06-10
JPH0660350B2 (en) 1994-08-10
DE3575577D1 (en) 1990-03-01
ES8609490A1 (en) 1986-07-16
ES546332A0 (en) 1986-07-16
EP0172544B2 (en) 1996-06-05
AU4658285A (en) 1986-02-27
US4877463A (en) 1989-10-31
EP0172544A2 (en) 1986-02-26
DE3431008A1 (en) 1986-03-06
ATE49779T1 (en) 1990-02-15
JPS6160824A (en) 1986-03-28
ZA856448B (en) 1986-04-30
EP0172544B1 (en) 1990-01-24

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