AT162155B - Shaped bodies made of porous iron or steel and a method for producing hollow bodies from the same. - Google Patents
Shaped bodies made of porous iron or steel and a method for producing hollow bodies from the same.Info
- Publication number
- AT162155B AT162155B AT162155DA AT162155B AT 162155 B AT162155 B AT 162155B AT 162155D A AT162155D A AT 162155DA AT 162155 B AT162155 B AT 162155B
- Authority
- AT
- Austria
- Prior art keywords
- steel
- same
- producing hollow
- bodies
- silicon
- Prior art date
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title description 13
- 229910000831 Steel Inorganic materials 0.000 title description 6
- 229910052742 iron Inorganic materials 0.000 title description 6
- 239000010959 steel Substances 0.000 title description 6
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 7
- 229910052710 silicon Inorganic materials 0.000 claims description 7
- 239000010703 silicon Substances 0.000 claims description 7
- 239000002253 acid Substances 0.000 claims description 3
- 150000007513 acids Chemical class 0.000 claims 1
- 238000005475 siliconizing Methods 0.000 description 3
- 229910000519 Ferrosilicon Inorganic materials 0.000 description 2
- XWHPIFXRKKHEKR-UHFFFAOYSA-N iron silicon Chemical compound [Si].[Fe] XWHPIFXRKKHEKR-UHFFFAOYSA-N 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 229910000676 Si alloy Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 150000003377 silicon compounds Chemical class 0.000 description 1
Landscapes
- Silicon Compounds (AREA)
- Powder Metallurgy (AREA)
Description
<Desc/Clms Page number 1>
Formkörper aus porösem Eisen oder Stahl und Verfahren zur Herstellung von Hohlkörpern aus denselben.
Es ist bekannt, Gegenstände aus auf schmelzflüssigem Wege hergestelltem Eisen oder Stahl durch Erhitzen unter Sauerstoffausschluss in Anwesenheit von flüchtigen Siliziumverbindungen mit einer harten und korrosionsbeständigen Oberfläche zu versehen. Bei diesem Verfahren macht sich unangenehm bemerkbar, dass das abgeschiedene Silizium, bzw. Ferrosilizium sehr spröde ist und dazu neigt, vom metallischen Grundkörper abzublättern.
Es wurde nun gefunden, dass beim Silizieren poröser, gepresster oder gesinterter Körper aus Eisen oder Stahl-im Gegensatz zu den durch Schmelzen hergestellten dichten Körpern- Schichten mit einem Siliziumgehalt von etwa 13 % Silizium entstehen, die verhältnismässig elastisch und mit dem porösen Grundkörper ausgezeichnet verbunden sind.
Je nach Wahl der Bedingungen kann die Ferrosiliziumschichte porös oder praktisch dicht erhalten werden. Die Schichte ist aber in jedem Fall dicker als unter gleichen Bedingungen hergestellte Silizium enthaltende Schichten auf dichten Körpern, welche aus auf schmelzflüssigem Wege hergestelltem Eisen oder Stahl bestehen.
Da das sich oberflächlich bildende Ferrosilizium säurebeständig ist, ist es möglich, aus den nach dem Verfahren gemäss der Erfindung erhaltenen silizierten Formkörpern auf einfache Weise dünnwandige Hohlkörper aus Eisen-Silizium-Legierungen herzustellen. Zu diesem Zwecke wird Eisenpulver gepresst und gegebenenfalls anschliessend gesintert.
Der poröse Formling wird dann siliziert und schliesslich der praktisch siliziumfreie Kern nach Entfernen eines Teiles der siliziumhaltigen Oberfläche durch Behandlung mit Säure herausgelöst.
In manchen Fällen ist es vorteilhaft, nach dem Silizieren des porösen Körpers oder gleichzeitig metallisches Chrom abzuscheiden.
PATENTANSPRÜCHE :
1. Formkörper aus porösem Eisen oder Stahl, dadurch gekennzeichnet, dass sie mit einer durch Silizieren hergestellten Silizium-Eisen-Schichte versehen sind.
**WARNUNG** Ende DESC Feld kannt Anfang CLMS uberlappen**.
<Desc / Clms Page number 1>
Shaped bodies made of porous iron or steel and a method for producing hollow bodies from the same.
It is known to provide objects made of molten iron or steel with a hard and corrosion-resistant surface by heating in the absence of oxygen in the presence of volatile silicon compounds. With this process it becomes unpleasantly noticeable that the deposited silicon or ferrosilicon is very brittle and tends to flake off the metallic base body.
It has now been found that when siliconizing porous, pressed or sintered bodies made of iron or steel - in contrast to the dense bodies produced by melting - layers with a silicon content of about 13% silicon are formed, which are relatively elastic and bond with the porous base body excellently are.
Depending on the choice of conditions, the ferrosilicon layer can be kept porous or practically dense. The layer is in any case thicker than silicon-containing layers produced under the same conditions on dense bodies, which consist of iron or steel produced in a molten manner.
Since the ferrous silicon which forms on the surface is acid-resistant, it is possible to produce thin-walled hollow bodies made of iron-silicon alloys in a simple manner from the siliconized molded bodies obtained by the process according to the invention. For this purpose, iron powder is pressed and, if necessary, then sintered.
The porous molding is then siliconized and finally the practically silicon-free core is removed by treatment with acid after part of the silicon-containing surface has been removed.
In some cases it is advantageous to deposit metallic chromium after siliconizing the porous body or at the same time.
PATENT CLAIMS:
1. Shaped bodies made of porous iron or steel, characterized in that they are provided with a silicon-iron layer produced by siliconizing.
** WARNING ** End of DESC field may overlap beginning of CLMS **.
Claims (1)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT162155T | 1946-05-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| AT162155B true AT162155B (en) | 1949-01-25 |
Family
ID=3651277
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AT162155D AT162155B (en) | 1946-05-28 | 1946-05-28 | Shaped bodies made of porous iron or steel and a method for producing hollow bodies from the same. |
Country Status (1)
| Country | Link |
|---|---|
| AT (1) | AT162155B (en) |
-
1946
- 1946-05-28 AT AT162155D patent/AT162155B/en active
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