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 gridInfo
- 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
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.
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 (3)
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 |
FR2569424B3 (en) * | 1984-08-23 | 1986-09-05 | Siderurgie Fse Inst Rech | METHOD OF MANUFACTURING LONG CRENELATED METAL PRODUCTS, PARTICULARLY STEEL, AND DEVICE FOR IMPLEMENTING SAME |
DD239805B1 (en) * | 1985-07-29 | 1988-06-22 | Thaelmann Schwermaschbau Veb | METHOD FOR PRODUCING A CONCRETE STEEL |
Family Cites Families (8)
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. |
-
1978
- 1978-06-16 ES ES470858A patent/ES470858A1/en not_active Expired
- 1978-06-19 NL NL7806613A patent/NL7806613A/en not_active Application Discontinuation
- 1978-06-19 DE DE19782826826 patent/DE2826826A1/en not_active Withdrawn
- 1978-06-19 SE SE7806987A patent/SE7806987L/en unknown
- 1978-06-19 NO NO782125A patent/NO782125L/en unknown
- 1978-06-19 LU LU79840A patent/LU79840A1/en unknown
- 1978-06-19 AT AT0446678A patent/ATA446678A/en not_active Application Discontinuation
- 1978-06-20 FR FR7818427A patent/FR2395084A1/en active Granted
Also Published As
Publication number | Publication date |
---|---|
SE7806987L (en) | 1978-12-21 |
LU79840A1 (en) | 1978-12-07 |
FR2395084A1 (en) | 1979-01-19 |
ATA446678A (en) | 1983-02-15 |
DE2826826A1 (en) | 1979-01-04 |
NL7806613A (en) | 1978-12-22 |
FR2395084B1 (en) | 1983-09-16 |
NO782125L (en) | 1978-12-21 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
FD1A | Patent lapsed |
Effective date: 20000601 |