EP0076541B1 - Lingotière en fonte pour la production de lingots en acier et son procédé de fabrication - Google Patents
Lingotière en fonte pour la production de lingots en acier et son procédé de fabrication Download PDFInfo
- Publication number
- EP0076541B1 EP0076541B1 EP19820201205 EP82201205A EP0076541B1 EP 0076541 B1 EP0076541 B1 EP 0076541B1 EP 19820201205 EP19820201205 EP 19820201205 EP 82201205 A EP82201205 A EP 82201205A EP 0076541 B1 EP0076541 B1 EP 0076541B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- mould
- cast
- ingot
- content
- iron
- 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.)
- Expired
Links
- 229910001018 Cast iron Inorganic materials 0.000 title claims description 20
- 229910000831 Steel Inorganic materials 0.000 title claims description 15
- 239000010959 steel Substances 0.000 title claims description 15
- 238000004519 manufacturing process Methods 0.000 title claims description 12
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 12
- 229910052698 phosphorus Inorganic materials 0.000 claims description 12
- 239000011574 phosphorus Substances 0.000 claims description 12
- 238000005266 casting Methods 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 6
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 5
- 229910052710 silicon Inorganic materials 0.000 claims description 5
- 239000010703 silicon Substances 0.000 claims description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- 229910001096 P alloy Inorganic materials 0.000 claims description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 2
- 239000005864 Sulphur Substances 0.000 claims description 2
- 229910052799 carbon Inorganic materials 0.000 claims description 2
- DPTATFGPDCLUTF-UHFFFAOYSA-N phosphanylidyneiron Chemical compound [Fe]#P DPTATFGPDCLUTF-UHFFFAOYSA-N 0.000 claims description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims 6
- 239000012535 impurity Substances 0.000 claims 3
- 229910052742 iron Inorganic materials 0.000 claims 3
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 claims 1
- 238000000034 method Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 229910001208 Crucible steel Inorganic materials 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000005275 alloying Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910000805 Pig iron Inorganic materials 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910001092 metal group alloy Inorganic materials 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D7/00—Casting ingots, e.g. from ferrous metals
- B22D7/06—Ingot moulds or their manufacture
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D7/00—Casting ingots, e.g. from ferrous metals
- B22D7/06—Ingot moulds or their manufacture
- B22D7/066—Manufacturing, repairing or reinforcing ingot moulds
- B22D7/068—Manufacturing, repairing or reinforcing ingot moulds characterised by the materials used therefor
Definitions
- This invention relates to a cast-iron ingot mould for use in the production of steel ingots in the steel industry, and to a method of manufacturing such an ingot mould.
- the starting material is often steel ingots which have been obtained by casting liquid steel into a cast-iron ingot mould and allowing the steel to solidify at least partly in the ingot mould.
- Such an ingot mould is a thick-walled hollow cast-iron body open at both ends and with a slightly tapering shape so that the ingot mould can be stripped from the cast steel ingot.
- the ingot mould is located on a heavy metal ingot plate, which defines the bottom of the ingot. The foot of the ingot mould contacts the plate.
- German Offenlegungsschrift 1 758 706, forming the first part of claim 1, describes a liquid cast-iron composition for the production of ingot mould, which contains:
- this liquid cast iron is enriched with substantial quantities of silicon, either in a metallic form or as a metal alloy of silicon, in order to achieve a silicon content in the cast ingot mould which is between 0.4 and 0.5% higher than the Mn content.
- the Si content in the ingot mould could be between 1.2 and 2.4%.
- the present invention has the object of improving the quality of cast-iron ingot moulds, in particular ingot moulds which are to be used for the production of heavy ingots in the weight range of 24 tons and-above, and is especially concerned at minimizing the problem of broken feet, especially by the use of a process which is of low cost and is easily carried out.
- the invention therefore consists in a cast-iron ingot mould with an analysis (by weight) of the cast-iron of: wherein the Si-content is smaller than the Mn-content.
- the sulphur content is between 0.015 and 0.25%.
- the Si-content is between 0.55 and 0.75% and the Mn content 0.74 and 0.95% but alternatively the Si-content may be between 1.0 and 1.15% and the Mn-content between 1.1 and 1.3%.
- a phosphorus content between 0.14 and 0.195% is unusually high for a cast-iron analysis. Nevertheless it has been found that this high phosphorus percentage definitely improves the life-span of ingot moulds of the above new composition, particularly by effectively counteracting the phenomenon of broken feet.
- the invention relates to not only the ingot mould, but also to a method for the manufacture of the ingot moulds according to the present invention as described above.
- a cast-iron composition of the analysis (by weight): is enriched with P by the addition of suitable amounts of an iron-phosphorus alloy.
- this new method has clear advantages. These consist in that firstly no abnormal production scheme has to be used in operating the blast furnace, and secondly the addition of a phosphorus alloy to the cast-iron makes possible a much more accurate adjustment of the phosphorus content within the desired limits.
- ingot moulds according to the invention can reduce the percentage of broken feet to only a fraction of the previously usual percentage. This effects a substantial reduction in the costs of the use of ingot moulds and of repair of ingot moulds with broken feet, which in turn results into a substantial lowering of the cost of the cast steel ingots.
- the cast steel ingots manufactured with the ingot moulds of the invention can have a smoother surface near the ingot mould foot, which provides advantages in the further conversion of the steel ingots into rolled products.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Claims (8)
1. Lingotière en fonte destinée à être utilisée dans la production de lingots d'acier, dans laquelle la fonte consiste en du fer, du carbone, du silicium, du manganèse, du soufre, du phosphore et les impuretés habituelles, caractérisée en ce que, au moins dans la région du pied de la lingotière, des quantités de ces éléments en poids sont, en combinaison:
le complément étant du fer et les impuretés habituelles, et en ce que la teneur en Si est plus faible que la teneur en Mn.
2. Lingotière selon la revendication 1, dans laquelle la teneur en S est comprise entre 0,015 et 0,025%.
3. Lingotière selon la revendication 1 ou la revendication 2, dans laquelle la teneur en Si est comprise entre 0,55 et 0,75% et la teneur en Mn entre 0,74 et 0,95%.
4. Lingotière selon la revendication 1 ou la revendication 2, dans laquelle la teneur en Si est comprise entre 1,0 et 1,15% et la teneur en Mn entre 1,1 et 1,3%.
5. Lingotière selon l'une quelconque des revendications précédentes, dans laquelle la teneur en P est comprise entre 0,16 et 0,18%.
6. Lingotière selon l'une quelconque des revendications précédentes, dans laquelle à l'extérieur de ladite région située au pied de la lingotière la fonte de la lingotière présente une teneur en P qui est d'environ 0,06% plus faible que dans ladite région située au pied du moule.
7. Procédé de fabrication d'une lingotière selon la revendication 1, dans laquelle avant de mouler la lingotière, on enrichit avec P par l'addition de quantités appropriées d'un alliage fer-phosphore une composition de fonte consistant, en poids, en:
et on l'utilise ensuite pour mouler ladite lingotière.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL8104509A NL8104509A (nl) | 1981-10-05 | 1981-10-05 | Blokvorm ten behoeve van het gieten van staalblokken en werkwijze voor de vervaardiging van deze blokvorm. |
| NL8104509 | 1981-10-05 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0076541A2 EP0076541A2 (fr) | 1983-04-13 |
| EP0076541A3 EP0076541A3 (en) | 1984-07-18 |
| EP0076541B1 true EP0076541B1 (fr) | 1986-08-20 |
Family
ID=19838159
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19820201205 Expired EP0076541B1 (fr) | 1981-10-05 | 1982-09-28 | Lingotière en fonte pour la production de lingots en acier et son procédé de fabrication |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0076541B1 (fr) |
| CA (1) | CA1179804A (fr) |
| DE (1) | DE3272740D1 (fr) |
| NL (1) | NL8104509A (fr) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1806753A (en) * | 1931-05-26 | Ingot mold | ||
| DE1134691B (de) * | 1957-10-16 | 1962-08-16 | Hessische Berg Und Huettenwerk | Verwendung eines Giesserei-Roheisens als Kokillen-Werkstoff |
| DE1758706B2 (de) * | 1968-07-25 | 1973-03-29 | Hüttenwerk Oberhausen AG, 4200 Oberhausen | Verfahren zur herstellung von stahlwerkskokillen |
-
1981
- 1981-10-05 NL NL8104509A patent/NL8104509A/nl not_active Application Discontinuation
-
1982
- 1982-09-22 CA CA000411969A patent/CA1179804A/fr not_active Expired
- 1982-09-28 EP EP19820201205 patent/EP0076541B1/fr not_active Expired
- 1982-09-28 DE DE8282201205T patent/DE3272740D1/de not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| EP0076541A2 (fr) | 1983-04-13 |
| CA1179804A (fr) | 1984-12-27 |
| NL8104509A (nl) | 1983-05-02 |
| DE3272740D1 (en) | 1986-09-25 |
| EP0076541A3 (en) | 1984-07-18 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
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| 17P | Request for examination filed |
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| STAA | Information on the status of an ep patent application or granted ep patent |
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