JPS5558338A - Manufacture of high tensile steel wire rod - Google Patents
Manufacture of high tensile steel wire rodInfo
- Publication number
- JPS5558338A JPS5558338A JP13031778A JP13031778A JPS5558338A JP S5558338 A JPS5558338 A JP S5558338A JP 13031778 A JP13031778 A JP 13031778A JP 13031778 A JP13031778 A JP 13031778A JP S5558338 A JPS5558338 A JP S5558338A
- Authority
- JP
- Japan
- Prior art keywords
- wire rod
- rod
- cool
- manufacture
- forced
- 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
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
- 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)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
Abstract
PURPOSE:To manufacture a high strength steel wire rod without hardening by hot rolling steel of a specified compsn. after which the resulting wire rod is forced to cool, circularly spread on a conveyor at a supercooled austenite state, cooled at a specified cooling rate to form a martensite structure, and slowly cooled. CONSTITUTION:Steel contg. C 0.10-0.40%, Si 0.05-1.5%, Mn 0.70-2.50%, Cr 0.10-1.50% and B 0.0002-0.0050% is hot rolled into a wire rod and immediately forced to cool to 500-700 deg.C with a forced cooling unit. The wire rod in a supercooled austenite stage is circularly spread on a conveyor with a laying cone and conveyed. At this state, a blast having a cooling capacity of 7 deg.C/sec or more is sprayed to cool the rod, thus forming a martensite structure all over the rod. The rod is then turned into a coil with a bundling unit and slowly cooled. The resulting wire rod has a high tensile strength of 110kg/mm<2> or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13031778A JPS5940208B2 (en) | 1978-10-23 | 1978-10-23 | Manufacturing method of high-tensile steel wire rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13031778A JPS5940208B2 (en) | 1978-10-23 | 1978-10-23 | Manufacturing method of high-tensile steel wire rod |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5558338A true JPS5558338A (en) | 1980-05-01 |
| JPS5940208B2 JPS5940208B2 (en) | 1984-09-28 |
Family
ID=15031428
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13031778A Expired JPS5940208B2 (en) | 1978-10-23 | 1978-10-23 | Manufacturing method of high-tensile steel wire rod |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5940208B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58157921A (en) * | 1982-03-12 | 1983-09-20 | High Frequency Heattreat Co Ltd | Steel bar or steel wire for prestressed concrete having excellent delayed fracture characteristic and mechanical property, more particularly uniform elongation and high-temperature relaxation and its production |
| JP2020002414A (en) * | 2018-06-27 | 2020-01-09 | 日本製鉄株式会社 | PC steel bar |
-
1978
- 1978-10-23 JP JP13031778A patent/JPS5940208B2/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58157921A (en) * | 1982-03-12 | 1983-09-20 | High Frequency Heattreat Co Ltd | Steel bar or steel wire for prestressed concrete having excellent delayed fracture characteristic and mechanical property, more particularly uniform elongation and high-temperature relaxation and its production |
| JPH0379410B2 (en) * | 1982-03-12 | 1991-12-18 | Koshuha Netsuren Kk | |
| JP2020002414A (en) * | 2018-06-27 | 2020-01-09 | 日本製鉄株式会社 | PC steel bar |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5940208B2 (en) | 1984-09-28 |
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