JPS56146820A - Annealing method for hot rolled steel strip with mill scale - Google Patents
Annealing method for hot rolled steel strip with mill scaleInfo
- Publication number
- JPS56146820A JPS56146820A JP5035680A JP5035680A JPS56146820A JP S56146820 A JPS56146820 A JP S56146820A JP 5035680 A JP5035680 A JP 5035680A JP 5035680 A JP5035680 A JP 5035680A JP S56146820 A JPS56146820 A JP S56146820A
- Authority
- JP
- Japan
- Prior art keywords
- steel strip
- rolled steel
- mill scale
- annealing
- hot
- 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.)
- Pending
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
- C21D3/00—Diffusion processes for extraction of non-metals; Furnaces therefor
- C21D3/02—Extraction of non-metals
- C21D3/04—Decarburising
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)
- Heat Treatment Of Sheet Steel (AREA)
Abstract
PURPOSE:To facilitate descaling in subsequent processes and accomplish continuous hot dipping exellently, by annealing a low C hot-rolled steel strip with mill scale in an oxidative and decarbonizing atmosphere in an open coil annealing furnace. CONSTITUTION:A hot-rolled steel strip of about <=0.15% C contents stuck with mill scale is conducted into an open coil annealing furnace, where it is decarburization-annealed with gaseous NHX in an oxidative and decarburizing atmosphere. The C contents of the steel strip after this decarburization annealing are regulated to <=0.008%, and after pickling and cold rolling, it is passed through a hot dipping line of Sendzimir type or the like, whereby it is plated. Despite the increase in oxidation scale by this method, it is easily removed by pickling, and furhter, the time for the decarburization annealing is reduced because the dew point is elevated.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5035680A JPS56146820A (en) | 1980-04-18 | 1980-04-18 | Annealing method for hot rolled steel strip with mill scale |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5035680A JPS56146820A (en) | 1980-04-18 | 1980-04-18 | Annealing method for hot rolled steel strip with mill scale |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS56146820A true JPS56146820A (en) | 1981-11-14 |
Family
ID=12856611
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5035680A Pending JPS56146820A (en) | 1980-04-18 | 1980-04-18 | Annealing method for hot rolled steel strip with mill scale |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS56146820A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001262223A (en) * | 2000-03-21 | 2001-09-26 | Nisshin Steel Co Ltd | METHOD FOR PRODUCING HIGH PURITY Fe-Cr ALLOY |
CN110791623A (en) * | 2019-11-08 | 2020-02-14 | 山西太钢不锈钢股份有限公司 | Annealing method of Mo-containing stainless steel hot-rolled strip steel for tank head |
-
1980
- 1980-04-18 JP JP5035680A patent/JPS56146820A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001262223A (en) * | 2000-03-21 | 2001-09-26 | Nisshin Steel Co Ltd | METHOD FOR PRODUCING HIGH PURITY Fe-Cr ALLOY |
JP4646086B2 (en) * | 2000-03-21 | 2011-03-09 | 日新製鋼株式会社 | Method for producing high purity Fe-Cr alloy |
CN110791623A (en) * | 2019-11-08 | 2020-02-14 | 山西太钢不锈钢股份有限公司 | Annealing method of Mo-containing stainless steel hot-rolled strip steel for tank head |
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