JPS5662917A - Method and apparatus of continuous annealing of composite structure steel plate - Google Patents
Method and apparatus of continuous annealing of composite structure steel plateInfo
- Publication number
- JPS5662917A JPS5662917A JP13967479A JP13967479A JPS5662917A JP S5662917 A JPS5662917 A JP S5662917A JP 13967479 A JP13967479 A JP 13967479A JP 13967479 A JP13967479 A JP 13967479A JP S5662917 A JPS5662917 A JP S5662917A
- Authority
- JP
- Japan
- Prior art keywords
- steel plate
- austenite
- temp
- amount
- quenching
- 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
- 229910000831 Steel Inorganic materials 0.000 title abstract 8
- 239000010959 steel Substances 0.000 title abstract 8
- 238000000137 annealing Methods 0.000 title abstract 3
- 238000000034 method Methods 0.000 title abstract 2
- 239000002131 composite material Substances 0.000 title 1
- 229910001566 austenite Inorganic materials 0.000 abstract 5
- 238000010791 quenching Methods 0.000 abstract 4
- 230000000171 quenching effect Effects 0.000 abstract 4
- 229910000734 martensite Inorganic materials 0.000 abstract 3
- 238000001816 cooling Methods 0.000 abstract 2
- 229910000859 α-Fe Inorganic materials 0.000 abstract 2
- 238000002441 X-ray diffraction Methods 0.000 abstract 1
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 230000008021 deposition Effects 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 abstract 1
- 230000000977 initiatory effect Effects 0.000 abstract 1
- 238000002791 soaking Methods 0.000 abstract 1
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
- C21D9/54—Furnaces for treating strips or wire
- C21D9/56—Continuous furnaces for strip or wire
- C21D9/573—Continuous furnaces for strip or wire with cooling
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 Sheet Steel (AREA)
- Control Of Heat Treatment Processes (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
Abstract
PURPOSE:To improve strength and ductility by controlling quenching rate and properly adjusting martensite formation amount at the time of continuously annealing a steel plate by quenching the same from two phase region temperatures of ferrite and austenite. CONSTITUTION:At the time of continuously annealing a steel plate 8, it is heated to the temp. region where the two phases of ferrite and austenite coexist in structure in a heating zone, whereby it is made into two-phase structure, after which it is quenched in the quenching zone 28 in succession to the soaking zone. In this case, the austenite amount in the steel plate which has passed a cooling unit 50 is measured with an austenite amount measuring device 56 by an X-ray diffraction method provided in the quenching zone 28. This measured value is put together with the temp. measured value of the steel plate by a thermometer 54 into a calculator 58. An upper stream side cooler 50 is controlled by this calculator 59 so that the temp. of the steel plate becomes the temp. just above the initiation of martensite deposition; in addition, the steel plate conveying speed is so controlled that the austenite amount detected with the measuring device 56 becomes the predetermined amount corresponding to the martensite amount in the product, whereby the steel plate cooling rate is properly controlled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13967479A JPS5938287B2 (en) | 1979-10-29 | 1979-10-29 | Continuous annealing method and device for composite structure steel plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13967479A JPS5938287B2 (en) | 1979-10-29 | 1979-10-29 | Continuous annealing method and device for composite structure steel plate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5662917A true JPS5662917A (en) | 1981-05-29 |
| JPS5938287B2 JPS5938287B2 (en) | 1984-09-14 |
Family
ID=15250769
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13967479A Expired JPS5938287B2 (en) | 1979-10-29 | 1979-10-29 | Continuous annealing method and device for composite structure steel plate |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5938287B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102016100811A1 (en) | 2015-09-25 | 2017-03-30 | Sms Group Gmbh | Method and determination of the structural components in an annealing line |
| WO2020249820A2 (en) | 2019-06-14 | 2020-12-17 | Sms Group Gmbh | Device and method for the contactless determination of at least one property of a metal product |
| US12291757B2 (en) | 2019-05-07 | 2025-05-06 | Sms Group Gmbh | Method for the heat treatment of a metal based on a predicted austenite content to achieve austenite content within a quality window |
| EP4549600A4 (en) * | 2022-09-27 | 2025-10-01 | Jfe Steel Corp | Continuous annealing plant, continuous annealing process, process for producing a cold-rolled steel sheet, and process for producing a clad steel sheet |
| EP4624598A4 (en) * | 2023-02-27 | 2026-04-01 | Jfe Steel Corp | Continuous annealing plant, continuous annealing process, process for producing cold-rolled steel sheet and process for producing clad steel sheet |
-
1979
- 1979-10-29 JP JP13967479A patent/JPS5938287B2/en not_active Expired
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102016100811A1 (en) | 2015-09-25 | 2017-03-30 | Sms Group Gmbh | Method and determination of the structural components in an annealing line |
| US12291757B2 (en) | 2019-05-07 | 2025-05-06 | Sms Group Gmbh | Method for the heat treatment of a metal based on a predicted austenite content to achieve austenite content within a quality window |
| WO2020249820A2 (en) | 2019-06-14 | 2020-12-17 | Sms Group Gmbh | Device and method for the contactless determination of at least one property of a metal product |
| WO2020249820A3 (en) * | 2019-06-14 | 2021-02-18 | Sms Group Gmbh | Device and method for the contactless determination of at least one property of a metal product |
| US12025553B2 (en) | 2019-06-14 | 2024-07-02 | Sms Group Gmbh | Device and method for the contactless determination of at least one property of a metal product |
| EP4549600A4 (en) * | 2022-09-27 | 2025-10-01 | Jfe Steel Corp | Continuous annealing plant, continuous annealing process, process for producing a cold-rolled steel sheet, and process for producing a clad steel sheet |
| EP4624598A4 (en) * | 2023-02-27 | 2026-04-01 | Jfe Steel Corp | Continuous annealing plant, continuous annealing process, process for producing cold-rolled steel sheet and process for producing clad steel sheet |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5938287B2 (en) | 1984-09-14 |
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