JPS572830A - Manufacture of steel product with superior suitability to pickling - Google Patents
Manufacture of steel product with superior suitability to picklingInfo
- Publication number
- JPS572830A JPS572830A JP7717280A JP7717280A JPS572830A JP S572830 A JPS572830 A JP S572830A JP 7717280 A JP7717280 A JP 7717280A JP 7717280 A JP7717280 A JP 7717280A JP S572830 A JPS572830 A JP S572830A
- Authority
- JP
- Japan
- Prior art keywords
- pickling
- hot
- products
- scale
- steel products
- 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/68—Temporary coatings or embedding materials applied before or during heat treatment
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)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Abstract
PURPOSE:To reduce the amount of secondary scale formed on the surfaces of steel products and to enhance the suitability of the scale to pickling by coating the products with metallic sulfide powder and with an antioxidant in order before hot- rolling the products. CONSTITUTION:When steel products such as a slab and a billet are heated to 1,100-1,400 deg.C and hot-rolled, the surfaces are previously coated with powder of >=1 kinds of metallic sulfides such as ZnS and FeS by 10-1,000g/m<2>. After further coating the surfaces with a mixture of Cr2O3, chamotte, SiO2, Al and sodium silicate as an antioxidant, the coated steel products are dried, heated, and hot- rolled. Thus, secondary scale is formed by a small amount during the hot-rolling and the following process, and the pickling of the scale with hydrochloric acid, sulfuric acid or the like is finished in a short time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7717280A JPS5920728B2 (en) | 1980-06-10 | 1980-06-10 | Method for manufacturing steel materials with excellent pickling properties |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7717280A JPS5920728B2 (en) | 1980-06-10 | 1980-06-10 | Method for manufacturing steel materials with excellent pickling properties |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS572830A true JPS572830A (en) | 1982-01-08 |
| JPS5920728B2 JPS5920728B2 (en) | 1984-05-15 |
Family
ID=13626368
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7717280A Expired JPS5920728B2 (en) | 1980-06-10 | 1980-06-10 | Method for manufacturing steel materials with excellent pickling properties |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5920728B2 (en) |
-
1980
- 1980-06-10 JP JP7717280A patent/JPS5920728B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5920728B2 (en) | 1984-05-15 |
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