DE315087C - - Google Patents
Info
- Publication number
- DE315087C DE315087C DENDAT315087D DE315087DA DE315087C DE 315087 C DE315087 C DE 315087C DE NDAT315087 D DENDAT315087 D DE NDAT315087D DE 315087D A DE315087D A DE 315087DA DE 315087 C DE315087 C DE 315087C
- Authority
- DE
- Germany
- Prior art keywords
- sand
- clay
- protective mass
- workpieces
- brush
- 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.)
- Active
Links
- 239000004927 clay Substances 0.000 claims description 6
- 229910052570 clay Inorganic materials 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 5
- 239000004576 sand Substances 0.000 claims description 5
- 239000011230 binding agent Substances 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 3
- 239000010433 feldspar Substances 0.000 claims description 2
- 230000001681 protective Effects 0.000 claims 2
- 239000010419 fine particle Substances 0.000 claims 1
- 238000007654 immersion Methods 0.000 claims 1
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims 1
- 229910000460 iron oxide Inorganic materials 0.000 claims 1
- 239000007788 liquid Substances 0.000 claims 1
- 210000001138 Tears Anatomy 0.000 description 3
- 239000004848 polyfunctional curative Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000011241 protective layer Substances 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000010425 asbestos Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching Effects 0.000 description 1
- 229910052895 riebeckite Inorganic materials 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
Classifications
-
- 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
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/04—Treatment of selected surface areas, e.g. using masks
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Or Physical Treatment Of Fibers (AREA)
- Fireproofing Substances (AREA)
Description
AUSGEGEBEN AM 8. NOVEMBER 1919ISSUED ON NOVEMBER 8, 1919
Bei der Einsatzhärtung· handelt es sich darum, gewisse Stellen der Werkstücke zu kohlen, andere ganz unverändert zu lassen. Man hat dies bisher u. a. in der Weise versucht, daß man das Härtemittel mit einem . geeigneten Bindemittel auf die zu kohlenden Stellen auftrug und dann das ganze Werkstück in Sand bzw. Lehm einpackte. Auch den umgekehrten Weg, dieCase hardening involves closing certain points on the workpieces coal to leave others completely unchanged. One has so far inter alia. tried in the way that you can use the hardener with a. suitable binder on the to be carbonized Places and then wrapped the entire workpiece in sand or clay. Also the reverse way that
ίο nicht zu kohlenden Stellen durch Asbest, Lehm usw. zu schützen, hat man versucht. . Das erstgenannte Verfahren krankt daran, daß nur geringe Mengen Härtemittel aufgetragen werden können, diese leicht abspringen, und daß beim Einstampfen die Härtemittelschicht leicht abbröckelt. Das umgekehrte Verfahren ist umständlich und dadurch teuer, außerdem unsicher, weil die Packungen leicht reißen und den Kohlungsgasen Durch-·ίο areas not to be charred by asbestos, Attempts have been made to protect clay etc. . The former method suffers from that only small amounts of hardener can be applied, they easily come off, and that the hardener layer easily crumbles when it is tamped. The reverse The procedure is cumbersome and therefore expensive, and also unsafe because the packs tear easily and the carbon gases penetrate
ao tritt gewähren. Auch, begünstigen die Packungen ein Verziehen der Werkstücke, indem sie beim Abschrecken der Kühlflüssigkeit ungleichmäßig Zutritt gewähren.ao occurs grant. Also, favor the Packs warping the workpieces by quenching the coolant Grant uneven access.
Demgegenüber wird nach dem vorliegen-In contrast, according to the present
den Verfahren eine Schutzschicht nur verhältnismäßig dünn (einige Millimeter bis etwa 2 cm. dick) mit dem Pinsel aufgetragen, welche aus mit Wasser angerührtem, reinem, gleichkörnigem, zweckmäßig scharfem Sandthe process a protective layer only proportionally thinly (a few millimeters to about 2 cm. thick) with a brush, which is made of pure, water-mixed even-grained, appropriately sharp sand
unter Zusatz von bis 40 Prozent eines außerordentlich fein verteilten Bindemittels, z. B. von Ton, besteht. Es hat dies den Erfolg, daß die Masse leicht streichfähig und bildsam wird, gut haftet, rasch austrocknet und ohne Reißen eine poröse Schutzschicht hinterläßt, die auch beim Erhitzen gut zusammenhält und nicht reißt.with the addition of up to 40 percent of an extremely finely divided binder, e.g. B. of clay. This has the result that the mass is easily spreadable and malleable becomes, adheres well, dries out quickly and leaves a porous protective layer without tearing, which holds together well when heated and does not tear.
Mikroskopische Betrachtung lehrt, daß das feine Bindemittel die groben Sand- oder Feldspat- o. dgl. Teilchen zusammengekittet hat. Wesentlich ist, daß mittelgroße Teilchen selten sind oder fehlen. Nur die Vereinigung verhältnismäßig großer und ganz winzig feiner Teilchen ergibt den gewünschten Erfolg.Microscopic observation teaches that the fine binder is the coarse sand or Has cemented feldspar or similar particles together. It is essential that medium-sized particles are rare or absent. Only the union that is relatively large and very tiny Particle gives the desired success.
Besonders vorteilhaft ist es hierbei, Kieselkörnchen mit Ton zusammen anzuwenden, da Kieselsäure bekanntlich im Feuer wächst und Ton schwindet, so daß die Mischung besonders standfest wird. Durch die charakteristische Schwammform der Masse reißen aber auch andere Zusammenstellungen nicht.It is particularly advantageous to use pebble grains together with clay because As is well known, silica grows in fire and clay shrinks, making the mixture special becomes steadfast. Due to the characteristic sponge shape of the mass, other compositions do not tear either.
In der Natur findet man geeignete Stoffe zur Zusammenstellung solcher Mischungen bzw. zur unmittelbaren Verwendung als gewisse .tonige Sande, welche sich bei der Ver-Witterung feldspathaltiger Gesteine ergeben. Die sog. Prophetenerde bietet hierfür ein besonders gutes Beispiel.In nature one finds suitable substances for the composition of such mixtures or for immediate use as certain .tony sands, which are weathered feldspathic rocks result. The so-called prophet earth offers a special one for this good example.
Besonders vorteilhaft ist es, wenn solche Massen Eisen als Oxyd oder Oxydul enthalten, weil sie dann eine besondere chemische Sicherheit gegen Kohlung der bedeckten Stellen gewähren.It is particularly advantageous if such masses contain iron as oxide or oxide, because they then have a special chemical security against carbonization of the covered Grant jobs.
Claims (1)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE315087C true DE315087C (en) |
Family
ID=567862
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT315087D Active DE315087C (en) |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE315087C (en) |
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0
- DE DENDAT315087D patent/DE315087C/de active Active
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