JPS57169020A - Production of high tensile steel bar - Google Patents
Production of high tensile steel barInfo
- Publication number
- JPS57169020A JPS57169020A JP5458981A JP5458981A JPS57169020A JP S57169020 A JPS57169020 A JP S57169020A JP 5458981 A JP5458981 A JP 5458981A JP 5458981 A JP5458981 A JP 5458981A JP S57169020 A JPS57169020 A JP S57169020A
- Authority
- JP
- Japan
- Prior art keywords
- steel bar
- tempering
- leveler
- contg
- temp
- 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
Abstract
PURPOSE: To produce a high tensile steel bar having superior stress relaxation properties in hardening and tempering stages for a steel bar contg. a specific range amt. of C by subjecting the same to warm working in the process of tempering.
CONSTITUTION: A steel bar contg. 0.2W0.4% C is drawn to a steel bar for piles and this is wound like a coil and is transferred to a heat treatment stage. Here, the steel bar 1 unrolled from the coil is subjected to simple leveling with a leveler 5 using rolls or the like to assume a rectilinear state to a certain extent. This steel bar enters a heating device 6 by high frequency induction heating or the like, by which it is heated to a temp. higher than the A3 transformation point. Then, in a water cooler 7, it is cooled by quick injection of cooling water or the like at cooling rates larger than the critical cooling rate and is thereby hardened. It is heated then to 300W500°C and is held at these temp. in a heater 8, whereby it is tempered. While the bar 1 is maintained at the above-mentioned tempering temps., it is subjected with a warm working device 10 consisting of rolls or the like resembling to those of the leveler 5, after which it is taken up on a drum 9.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5458981A JPS57169020A (en) | 1981-04-11 | 1981-04-11 | Production of high tensile steel bar |
| GB8133389A GB2088258B (en) | 1980-11-08 | 1981-11-05 | Making high tensile steel wires |
| KR1019810004261A KR890002619B1 (en) | 1980-11-08 | 1981-11-07 | Process for manufacturing high tensile steel wire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5458981A JPS57169020A (en) | 1981-04-11 | 1981-04-11 | Production of high tensile steel bar |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57169020A true JPS57169020A (en) | 1982-10-18 |
| JPH0124848B2 JPH0124848B2 (en) | 1989-05-15 |
Family
ID=12974903
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5458981A Granted JPS57169020A (en) | 1980-11-08 | 1981-04-11 | Production of high tensile steel bar |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57169020A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57198211A (en) * | 1981-05-29 | 1982-12-04 | Sumitomo Electric Ind Ltd | Manufacture of heat treat pc steel rod |
| JPS58338A (en) * | 1981-06-26 | 1983-01-05 | High Frequency Heattreat Co Ltd | Manufacturing device for steel rod or steel wire for prestressed concrete with superior delay breaking and superior mechanical characteristics |
| JPS581016A (en) * | 1981-06-26 | 1983-01-06 | High Frequency Heattreat Co Ltd | Production of steel bar of steel wire having superior delayed breakdown characteristic and mechanical properties for prestressed concrete |
| JPS6013029A (en) * | 1983-07-01 | 1985-01-23 | Kawasaki Steel Corp | Production of high-tension steel bar material |
| JPS62136520A (en) * | 1985-12-09 | 1987-06-19 | Sumitomo Metal Ind Ltd | Production of high tensile steel wire having excellent delayed cracking resistant characteristic |
| JPS63151720A (en) * | 1986-12-11 | 1988-06-24 | 川鉄テクノワイヤ株式会社 | High strength pc steel rod and high strength pile |
| JPH06248642A (en) * | 1991-08-09 | 1994-09-06 | Kawatetsu Techno Wire Kk | High-strength pile |
-
1981
- 1981-04-11 JP JP5458981A patent/JPS57169020A/en active Granted
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57198211A (en) * | 1981-05-29 | 1982-12-04 | Sumitomo Electric Ind Ltd | Manufacture of heat treat pc steel rod |
| JPS58338A (en) * | 1981-06-26 | 1983-01-05 | High Frequency Heattreat Co Ltd | Manufacturing device for steel rod or steel wire for prestressed concrete with superior delay breaking and superior mechanical characteristics |
| JPS581016A (en) * | 1981-06-26 | 1983-01-06 | High Frequency Heattreat Co Ltd | Production of steel bar of steel wire having superior delayed breakdown characteristic and mechanical properties for prestressed concrete |
| JPS6249334B2 (en) * | 1981-06-26 | 1987-10-19 | Koshuha Netsuren Kk | |
| JPH0227419B2 (en) * | 1981-06-26 | 1990-06-18 | Koshuha Netsuren Kk | |
| JPS6013029A (en) * | 1983-07-01 | 1985-01-23 | Kawasaki Steel Corp | Production of high-tension steel bar material |
| JPH0565567B2 (en) * | 1983-07-01 | 1993-09-20 | Kawasaki Steel Co | |
| JPS62136520A (en) * | 1985-12-09 | 1987-06-19 | Sumitomo Metal Ind Ltd | Production of high tensile steel wire having excellent delayed cracking resistant characteristic |
| JPH0559967B2 (en) * | 1985-12-09 | 1993-09-01 | Sumitomo Metal Ind | |
| JPS63151720A (en) * | 1986-12-11 | 1988-06-24 | 川鉄テクノワイヤ株式会社 | High strength pc steel rod and high strength pile |
| JPH0541684B2 (en) * | 1986-12-11 | 1993-06-24 | Kawatetsu Techno Wire Kk | |
| JPH06248642A (en) * | 1991-08-09 | 1994-09-06 | Kawatetsu Techno Wire Kk | High-strength pile |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0124848B2 (en) | 1989-05-15 |
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