JPS5739123A - Annealing method for cold rolled steel plate - Google Patents
Annealing method for cold rolled steel plateInfo
- Publication number
- JPS5739123A JPS5739123A JP9736380A JP9736380A JPS5739123A JP S5739123 A JPS5739123 A JP S5739123A JP 9736380 A JP9736380 A JP 9736380A JP 9736380 A JP9736380 A JP 9736380A JP S5739123 A JPS5739123 A JP S5739123A
- Authority
- JP
- Japan
- Prior art keywords
- tendency
- gas
- furnace
- steel plate
- decarburization
- 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
- C21D9/54—Furnaces for treating strips or wire
- C21D9/663—Bell-type furnaces
-
- 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
- C21D1/76—Adjusting the composition of the atmosphere
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)
Abstract
PURPOSE:To inhibit carbon deterioration and nitriding tendency, by automatically computing and controlling the atmosphere of a mixed gas of N2 and H2 in annealing so that an index showing carbon deposition and decarburization tendency represents invariable decarburization. CONSTITUTION:The mixture of H2 gas and N2 gas with N2 base is sent through a mixing machine 2 into a box type annealing furnace 1. Subsequently, CO formed in the furnace during the process of annealing and H2 in an atmosphere in the furnace are measured with an analyzer 4 and the moisture with a moisture analyzer 3. These measurements are input to a computer 6. An index showing the carbon deposition and decarbrization tendency of steel plate is computed in association with the temperature of the steel plate at a point of time of the measurement. At that time, if the index represents a carbon deposition tendency, moisture is fed from a pipe for sending an adjustment gas 9 into the furnace 1 and the atmospheric gas is automatically computed and controlled so that the index represents the decarburization tendency invariably.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9736380A JPS5739123A (en) | 1980-07-16 | 1980-07-16 | Annealing method for cold rolled steel plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9736380A JPS5739123A (en) | 1980-07-16 | 1980-07-16 | Annealing method for cold rolled steel plate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5739123A true JPS5739123A (en) | 1982-03-04 |
| JPS6152216B2 JPS6152216B2 (en) | 1986-11-12 |
Family
ID=14190413
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9736380A Granted JPS5739123A (en) | 1980-07-16 | 1980-07-16 | Annealing method for cold rolled steel plate |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5739123A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6372821A (en) * | 1986-09-16 | 1988-04-02 | Osaka Oxygen Ind Ltd | Treatment of metal |
| KR20020055713A (en) * | 2000-12-29 | 2002-07-10 | 이구택 | Apparatus for measuring the pollution level of the the atmosphere gas |
| JP2020190017A (en) * | 2019-05-23 | 2020-11-26 | Ｊｆｅスチール株式会社 | Dew point control method for reduction atmospheric furnace, reduction atmospheric furnace, method for producing cold rolled steel sheet, and method for producing hot dip galvanized steel sheet |
-
1980
- 1980-07-16 JP JP9736380A patent/JPS5739123A/en active Granted
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6372821A (en) * | 1986-09-16 | 1988-04-02 | Osaka Oxygen Ind Ltd | Treatment of metal |
| KR20020055713A (en) * | 2000-12-29 | 2002-07-10 | 이구택 | Apparatus for measuring the pollution level of the the atmosphere gas |
| JP2020190017A (en) * | 2019-05-23 | 2020-11-26 | Ｊｆｅスチール株式会社 | Dew point control method for reduction atmospheric furnace, reduction atmospheric furnace, method for producing cold rolled steel sheet, and method for producing hot dip galvanized steel sheet |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6152216B2 (en) | 1986-11-12 |
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