JPS56116826A - Production of copper-containing hot rolled steel sheet excellent in surface condition - Google Patents
Production of copper-containing hot rolled steel sheet excellent in surface conditionInfo
- Publication number
- JPS56116826A JPS56116826A JP2099980A JP2099980A JPS56116826A JP S56116826 A JPS56116826 A JP S56116826A JP 2099980 A JP2099980 A JP 2099980A JP 2099980 A JP2099980 A JP 2099980A JP S56116826 A JPS56116826 A JP S56116826A
- Authority
- JP
- Japan
- Prior art keywords
- case
- steel sheet
- hot rolled
- rolled steel
- surface condition
- 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
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
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)
- Heat Treatment Of Steel (AREA)
Abstract
PURPOSE:To improve a surface condition of a hot rolled steel sheet at a low production cost, by substituting a part of Ni in the steel with Cr, lowering a slab heating temperature during a hot rolling step, and controlling a slab heating period. CONSTITUTION:At least a part of Ni, which restricts enriching of Cu in a surface layer of the steel, is substituted with Cr in a range represented by the formula of (%Cr)>=2(%Ni). The formation of the Cu-enriched layer is also restricted by shortening a period of storing a slab in a furnace to 3-3.5hr. The upper limit of a heating temperature is controlled in accordance with Ni and Cr contents, i.e., the value R represented by the formula of [2(%Ni)X(%Cr)]/2(%Cu)=R. In case of R<=1/4, the upper limit is 1,150 deg.C. In case of 1/4<R<=1/2, it is 1,200 deg.C. In case of 1/2<R<3/4, it is 1,250 deg.C. In case of 3/4<R<=1, it is 1,300 deg.C. The lower limit of the heating temperature is set at 1,100 deg.C or higher.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2099980A JPS56116826A (en) | 1980-02-21 | 1980-02-21 | Production of copper-containing hot rolled steel sheet excellent in surface condition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2099980A JPS56116826A (en) | 1980-02-21 | 1980-02-21 | Production of copper-containing hot rolled steel sheet excellent in surface condition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS56116826A true JPS56116826A (en) | 1981-09-12 |
| JPS617448B2 JPS617448B2 (en) | 1986-03-06 |
Family
ID=12042804
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2099980A Granted JPS56116826A (en) | 1980-02-21 | 1980-02-21 | Production of copper-containing hot rolled steel sheet excellent in surface condition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS56116826A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4171379B2 (en) * | 2002-09-27 | 2008-10-22 | 新日本製鐵株式会社 | Cu-containing steel material having excellent surface properties and method for producing the same |
-
1980
- 1980-02-21 JP JP2099980A patent/JPS56116826A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS617448B2 (en) | 1986-03-06 |
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