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ES470858A1 - 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 - Google Patents

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

Info

Publication number
ES470858A1
ES470858A1 ES470858A ES470858A ES470858A1 ES 470858 A1 ES470858 A1 ES 470858A1 ES 470858 A ES470858 A ES 470858A ES 470858 A ES470858 A ES 470858A ES 470858 A1 ES470858 A1 ES 470858A1
Authority
ES
Spain
Prior art keywords
rod
grid
steel
air cooling
hot rolling
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
Application number
ES470858A
Other languages
Spanish (es)
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.)
British Steel Corp
Original Assignee
British Steel Corp
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
Priority claimed from GB25695/77A external-priority patent/GB1576944A/en
Priority claimed from GB45765/77A external-priority patent/GB1587215A/en
Application filed by British Steel Corp filed Critical British Steel Corp
Publication of ES470858A1 publication Critical patent/ES470858A1/en
Expired 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
    • 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
    • C21D9/525—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length for wire, for rods

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Heat Treatment Of Steel (AREA)
  • Metal Rolling (AREA)

Abstract

Prodn. of a welded steel rod grid comprises (a) hot rolling steel into rod leaving the last rolling mill stand at 1000 degrees C (b) water cooling the rod surface to 300-700 degrees C to obtain a surface layer of martensite or bainite (c) air cooling to temper the surface layer and (d) without any drawing or other mechanical work, the rod is aligned as a grid and welded at the overlapping junctions. After (b), the rod can be formed into non-concentric loops laid on a conveyor for air cooling and then assembled into coils. The air cooling is pref. in still air which drops the rod temp. by 100 degrees C. During hot rolling, bulges or grooves are pref. formed on the rod. The rod is straightened before cutting to length for grid mfr. The steel is pref. a carbon-manganese steel contg. 0.05-1.0%, esp. 0.08-0.35% C and the initial steel is pref. at equilibrium or killed.
ES470858A 1977-06-20 1978-06-16 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 Expired ES470858A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB25695/77A GB1576944A (en) 1977-06-20 1977-06-20 Production of steeel rod or bar
GB45765/77A GB1587215A (en) 1977-11-03 1977-11-03 Manufacture of welded steel mesh

Publications (1)

Publication Number Publication Date
ES470858A1 true ES470858A1 (en) 1979-10-01

Family

ID=26257817

Family Applications (1)

Application Number Title Priority Date Filing Date
ES470858A Expired ES470858A1 (en) 1977-06-20 1978-06-16 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

Country Status (8)

Country Link
AT (1) ATA446678A (en)
DE (1) DE2826826A1 (en)
ES (1) ES470858A1 (en)
FR (1) FR2395084A1 (en)
LU (1) LU79840A1 (en)
NL (1) NL7806613A (en)
NO (1) NO782125L (en)
SE (1) SE7806987L (en)

Families Citing this family (2)

* 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
DD239805B1 (en) * 1985-07-29 1988-06-22 Thaelmann Schwermaschbau Veb METHOD FOR PRODUCING A CONCRETE STEEL

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1327495A (en) * 1962-06-28 1963-05-17 Tor Isteg Steel Corp Manufacturing process of steel bars, in particular bars for reinforced concrete
US3231432A (en) * 1964-10-08 1966-01-25 Morgan Construction Co Process for the quenching of hot rolled rods in direct sequence with rod mill
FR2005819A1 (en) * 1969-04-03 1969-12-19 Centre Nat Rech Metall Concrete reinforcement steel with high stretch strength - and improved weldability
NL168000C (en) * 1971-04-14 1982-02-16 Koninklijke Hoogovens En Staal METHOD FOR PRODUCING LOW CARBON STEEL PROFILE PROFILE, AND WELDED PRODUCTS, SUCH AS CONCRETE MATS, MANUFACTURED FROM PROFILED BARS OBTAINED
NL170159C (en) * 1973-06-04 1982-10-01 Estel Hoogovens Bv METHOD FOR MANUFACTURING WELDABLE LOW CARBON STEEL MATERIAL BY CONTROLLED COOLING
DD106661A1 (en) * 1973-09-24 1974-06-20
IT1090143B (en) * 1975-01-29 1985-06-18 Centre Rech Metallurgique PROCESS FOR MANUFACTURING LAMINATED STEEL PRODUCTS
BE847379A (en) * 1976-10-15 1977-01-31 PROCESS FOR THE MANUFACTURE OF HIGH ELASTIC LIMIT STEEL WIRE.

Also Published As

Publication number Publication date
SE7806987L (en) 1978-12-21
NL7806613A (en) 1978-12-22
DE2826826A1 (en) 1979-01-04
FR2395084A1 (en) 1979-01-19
NO782125L (en) 1978-12-21
FR2395084B1 (en) 1983-09-16
LU79840A1 (en) 1978-12-07
ATA446678A (en) 1983-02-15

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Legal Events

Date Code Title Description
FD1A Patent lapsed

Effective date: 20000601