FR2411891A1 - Pretreating steel surfaces to be hot dip coated or enamelled - by heat treatment to oxidise alloying elements and impurities only - Google Patents
Pretreating steel surfaces to be hot dip coated or enamelled - by heat treatment to oxidise alloying elements and impurities onlyInfo
- Publication number
- FR2411891A1 FR2411891A1 FR7738709A FR7738709A FR2411891A1 FR 2411891 A1 FR2411891 A1 FR 2411891A1 FR 7738709 A FR7738709 A FR 7738709A FR 7738709 A FR7738709 A FR 7738709A FR 2411891 A1 FR2411891 A1 FR 2411891A1
- Authority
- FR
- France
- Prior art keywords
- hot dip
- impurities
- oxidised
- formation
- alloying elements
- 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.)
- Withdrawn
Links
- 229910000831 Steel Inorganic materials 0.000 title abstract 4
- 239000010959 steel Substances 0.000 title abstract 4
- 238000005275 alloying Methods 0.000 title abstract 2
- 239000012535 impurity Substances 0.000 title abstract 2
- 238000010438 heat treatment Methods 0.000 title 1
- 230000015572 biosynthetic process Effects 0.000 abstract 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract 2
- SZVJSHCCFOBDDC-UHFFFAOYSA-N ferrosoferric oxide Chemical compound O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 abstract 2
- 239000010410 layer Substances 0.000 abstract 2
- 239000002344 surface layer Substances 0.000 abstract 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract 1
- 238000004320 controlled atmosphere Methods 0.000 abstract 1
- 238000003618 dip coating Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 abstract 1
- 238000005246 galvanizing Methods 0.000 abstract 1
- 229910052742 iron Inorganic materials 0.000 abstract 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 abstract 1
- 229910052760 oxygen Inorganic materials 0.000 abstract 1
- 239000001301 oxygen Substances 0.000 abstract 1
- 238000005554 pickling Methods 0.000 abstract 1
- 238000005096 rolling process 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
- 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
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
- C23C2/022—Pretreatment of the material to be coated, e.g. for coating on selected surface areas by heating
- C23C2/0222—Pretreatment of the material to be coated, e.g. for coating on selected surface areas by heating in a reactive atmosphere, e.g. oxidising or reducing atmosphere
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Coating With Molten Metal (AREA)
Abstract
Steel products to be hot coated (e.g. by hot dip coating or enamelling) are heat treated in a controlled atmosphere under normal total pressure but in which a partial pressure of oxygen is maintained such that (a) iron is not oxidised or is only partially oxidised without formation of higher oxides and (b) elements such as C, Mn, P, Al and Si are completely oxidised within a thin surface layer without formation of a continuous surface oxide layer. The treatment can be applied to slabs and billets prior to rolling and to rolled products, esp. to prepare them for hot dip galvanising. The treatment neutralises the effect of alloying elements and impurities in the steel surface so that steels of different compsns. can be coated under indentical conditions. By preventing formation of a continuous oxide layer (esp. of scale contg. Fe2O3 and Fe3O4), removal of the treated surface layer during pickling is avoided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR7738709A FR2411891A1 (en) | 1977-12-14 | 1977-12-14 | Pretreating steel surfaces to be hot dip coated or enamelled - by heat treatment to oxidise alloying elements and impurities only |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR7738709A FR2411891A1 (en) | 1977-12-14 | 1977-12-14 | Pretreating steel surfaces to be hot dip coated or enamelled - by heat treatment to oxidise alloying elements and impurities only |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR2411891A1 true FR2411891A1 (en) | 1979-07-13 |
Family
ID=9199164
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR7738709A Withdrawn FR2411891A1 (en) | 1977-12-14 | 1977-12-14 | Pretreating steel surfaces to be hot dip coated or enamelled - by heat treatment to oxidise alloying elements and impurities only |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR2411891A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1076105A1 (en) * | 1999-02-25 | 2001-02-14 | Kawasaki Steel Corporation | Steel plate, hot-dip steel plate and alloyed hot-dip steel plate and production methods therefor |
| EP2343393B2 (en) † | 2002-03-01 | 2017-03-01 | JFE Steel Corporation | Surface treated steel plate and method for production thereof |
-
1977
- 1977-12-14 FR FR7738709A patent/FR2411891A1/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1076105A1 (en) * | 1999-02-25 | 2001-02-14 | Kawasaki Steel Corporation | Steel plate, hot-dip steel plate and alloyed hot-dip steel plate and production methods therefor |
| EP1076105A4 (en) * | 1999-02-25 | 2009-01-07 | Jfe Steel Corp | Steel plate, hot-dip steel plate and alloyed hot-dip steel plate and production methods therefor |
| EP2343393B2 (en) † | 2002-03-01 | 2017-03-01 | JFE Steel Corporation | Surface treated steel plate and method for production thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| ST | Notification of lapse |