AT111879B - Process for the production of highly acid-resistant castings. - Google Patents
Process for the production of highly acid-resistant castings.Info
- Publication number
- AT111879B AT111879B AT111879DA AT111879B AT 111879 B AT111879 B AT 111879B AT 111879D A AT111879D A AT 111879DA AT 111879 B AT111879 B AT 111879B
- Authority
- AT
- Austria
- Prior art keywords
- production
- highly acid
- resistant
- resistant castings
- castings
- Prior art date
Links
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- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Description
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Verfahren zur Herstellung hochsäurebeständiger (Gussstücke.
Die Herstellung hochsäurebeständiger Eisenlegierungen mit dem hiefür erforderlichen Silizium gehalt erfolgt nach den bisher bekannten Verfahren in der Weise. dass hochprozentiges Ferrosilizium und kohlenstoffarmes Eisen entweder in der gleichen oder in verschiedenen Sehmelzgelegenheiten niedregeschmolzen und in einem solehen Verhältnis gemischt werden, dass das Enderzeugnis den gewünschten Gehalt an Silizium besitzt. Alle diese Verfahren haben also die Verwendung von zwei verschiedenen Ausgangsstoffen in der Giesserei zur Voraussetzung, was die Verfahren verhältnismässig umständlich macht.
Eingehende Versuche der Anmelderin mit verschiedenen Ausgangsstoffen und verschiedenen Schmelzgelegenheiten haben gezeigt, dass ein allen Anforderungen genügender hochsäu@ebeständiger Eisenguss in einfacher und wirtschaftlicher Weise auch dadurch erzielt werden kann. dass man lediglich eine Ferrosiliziumlegierung von bestimmtem Gehalt an Silizium in einem Ofen niederschmilzt, der eine Anreicherung an Kohlenstoff ausschliesst und dann unmittelbar in die Gussformen vergiesst. Es ist hiebei nur darauf Rücksicht zu nehmen, dass der anteilmässige Gehalt des Ausgangsstoffes an Silizium um so viel höher gewählt wird als jener des gewünschten Enderzeugnisses. dass der erfahrungsgemäss in dem Ofen auftretende Abbrand an Silizium dadurch ausgeglichen wird.
Als geeignete Sehmelzgelegenheiten sind beispielsweise der Elektroofen, der ölgefeuerte Flammkupolofen und andere zu nennen, die auch die Erreichung der für das Verfahren erforderlichen verhältnismässig hohen Temperaturen gestatten.
Um einen zeigen Siliziumguss zu erhalten, schmilzt man also beispielsweise Fe-Si von 22%
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4% auf 18 'o verringert. Soweit erforderlich, werden etwa gewünschte weitere Zusätze gleichzeitig in dem Ofen niedergesehmolzen. Diese geschmolzene Legierung kann dann ohne weiteres in die Formen vergossen werden.
PATENT-ANSPRÜCHE : J. Verfahren zur Herstellung hoehsäurebeständiger Gussstücke aus siliziumhaltigen Eisenlegierungen. dadurch gekennzeichnet, dass eine Fe-Si-Legierung in einem geeigneten, die Aufnahme von Kohlenstoff
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gehalt der Legierung um so viel höher als jener der fertigen Gussstiicke gewählt wird als dem erfahrungs- mässigen Abbrand entspricht.
**WARNUNG** Ende DESC Feld kannt Anfang CLMS uberlappen**.
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Process for the production of highly acid-resistant (castings.
The production of highly acid-resistant iron alloys with the silicon content required for this is carried out according to the previously known methods in the manner. that high-percentage ferrosilicon and low-carbon iron are melted down either in the same or in different clay occasions and mixed in such a ratio that the end product has the desired silicon content. All these processes therefore require the use of two different starting materials in the foundry, which makes the process relatively cumbersome.
In-depth tests by the applicant with various starting materials and various melting opportunities have shown that a highly acid-resistant cast iron that satisfies all requirements can also be achieved in a simple and economical manner. that one merely melts a ferrosilicon alloy with a certain silicon content in a furnace, which excludes an accumulation of carbon and then casts it directly into the casting molds. It is only necessary to take into account that the proportion of silicon in the starting material is chosen to be so much higher than that of the desired end product. that the erosion of silicon occurring in the furnace according to experience is thereby compensated.
The electric furnace, the oil-fired flame cupola and others which also allow the relatively high temperatures required for the process to be reached are, for example, suitable for sleeping.
In order to get a good silicon casting, for example Fe-Si of 22% is melted
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4% reduced to 18 'o. If necessary, any further additives desired are simultaneously melted down in the furnace. This molten alloy can then be easily poured into the molds.
PATENT CLAIMS: J. Process for the production of high acid-resistant castings from silicon-containing iron alloys. characterized in that an Fe-Si alloy in a suitable, the inclusion of carbon
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The content of the alloy is so much higher than that of the finished castings is selected as corresponds to the experience-based burnup.
** WARNING ** End of DESC field may overlap beginning of CLMS **.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE111879X | 1926-05-12 |
Publications (1)
Publication Number | Publication Date |
---|---|
AT111879B true AT111879B (en) | 1928-12-27 |
Family
ID=29276378
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
AT111879D AT111879B (en) | 1926-05-12 | 1927-04-16 | Process for the production of highly acid-resistant castings. |
Country Status (1)
Country | Link |
---|---|
AT (1) | AT111879B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1240537B (en) * | 1957-12-18 | 1967-05-18 | Jellinghaus Fa Geb | Process for the production of simultaneously wear-resistant, corrosion-resistant and machinable castings made of silicon iron |
-
1927
- 1927-04-16 AT AT111879D patent/AT111879B/en active
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1240537B (en) * | 1957-12-18 | 1967-05-18 | Jellinghaus Fa Geb | Process for the production of simultaneously wear-resistant, corrosion-resistant and machinable castings made of silicon iron |
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