PL70530B2 - - Google Patents
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- Publication number
- PL70530B2 PL70530B2 PL14385070A PL14385070A PL70530B2 PL 70530 B2 PL70530 B2 PL 70530B2 PL 14385070 A PL14385070 A PL 14385070A PL 14385070 A PL14385070 A PL 14385070A PL 70530 B2 PL70530 B2 PL 70530B2
- Authority
- PL
- Poland
- Prior art keywords
- protective coating
- coating
- iron
- castings
- molds
- Prior art date
Links
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 12
- 239000011253 protective coating Substances 0.000 claims description 6
- 239000000377 silicon dioxide Substances 0.000 claims description 5
- 229910000805 Pig iron Inorganic materials 0.000 claims description 3
- 239000007864 aqueous solution Substances 0.000 claims description 2
- 239000011230 binding agent Substances 0.000 claims description 2
- 229910052681 coesite Inorganic materials 0.000 claims description 2
- 239000008119 colloidal silica Substances 0.000 claims description 2
- 229910052906 cristobalite Inorganic materials 0.000 claims description 2
- 238000001035 drying Methods 0.000 claims description 2
- 235000012239 silicon dioxide Nutrition 0.000 claims description 2
- 229910052682 stishovite Inorganic materials 0.000 claims description 2
- 229910052905 tridymite Inorganic materials 0.000 claims description 2
- 229910001018 Cast iron Inorganic materials 0.000 claims 1
- 239000011819 refractory material Substances 0.000 claims 1
- 238000005266 casting Methods 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 239000004927 clay Substances 0.000 description 2
- 239000008199 coating composition Substances 0.000 description 2
- 239000000571 coke Substances 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000454 talc Substances 0.000 description 2
- 229910052623 talc Inorganic materials 0.000 description 2
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
- 206010039509 Scab Diseases 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-N ammonia Natural products N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 1
- 235000011114 ammonium hydroxide Nutrition 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 235000013339 cereals Nutrition 0.000 description 1
- 230000001112 coagulating effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 235000013312 flour Nutrition 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-L sulfite Chemical compound [O-]S([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-L 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
Landscapes
- Paints Or Removers (AREA)
- Mold Materials And Core Materials (AREA)
Description
Pierwszenstwo: Zgloszenie ogloszono: 15.03.1973 Opis patentowy opublikowano: 03.06.1974 U. 31^,3/00 MKP B22c 3/00 CZYTELNIA Urzedu Patentowego Twórcywynalazku: Stanislaw Strama, Jerzy Knapik, Zbigniew Gawlikowski, Jerzy Salwa Uprawniony z patentu tymczasowego: Huta im. Lenina, Kraków (Polska) Powloka ochronna zwlaszcza na formy ciezkich odlewów surówkowych i zeliwnych Przedmiotem wynalazku jest powloka ochronna zwlaszcza na formy ciezkich odlewów surówkowych i zeliwnych.Znane i stosowane dotychczas powloki ochronne, w których skladnikami ognioodpornymi sa najczesciej pyl koksowy, grafit i talk, a czynnikiem wiazacym glina ogniotrwala, betonit lub lug posulfitowy — nie zabez¬ pieczaja form ciezkich odlewów przed powstawaniem wad powierzchniowych, glównie przepaleri i strupów odlewniczych. Wady te znacznie obnizaja wartosc uzytkowa odlewów, a usuniecie ich jest pracochlonne.Celem wynalazku jest wyeliminowanie powyzszych wad, a zadaniem technicznym opracowanie powloki ochronnej o wysokiej przyczepnosci oraz odpornej na silne dzialanie promieniowania cieplnego i na znaczne cisnienia statyczne metalu.Zadanie to zostalo rozwiazane dzieki temu, ze do stosowanych dotychczas skladników powloki ochronna takich jak talk techniczny, maczka cyrkonowa, tlenek glinu, pyl koksowy lub grafit, stosuje sie wodny roztwór krzemionki koloidalnej o zawartosci do 30% Si02, który po wysuszeniu wiaze powloke. Roztwór koloidalny krzemionki, jako stabilny czy nie podlegajacy koagulacji podczas przechowywania, mozna otrzymac z krzemu metalicznego poprzez rozpuszczenie go w wodnych roztworach amoniaku lub innymi znanymi z literatury i prak¬ tyki sposobami, na przyklad sposobami wg patentów USA nr nr 2614993, 2614994, 2614995 i 2572578.Przyklad. Powloke wedlug wynalazku sporzadza sie w równych czesciach wagowych z talku technicz¬ nego, grafitu srebrzystego i pylu koksowego o maksymalnej wielkosci ziarna do 0,2 mm. Po dokladnym wymie¬ szaniu tych skladników dodaje sie wodny roztwór koloidalny krzemionki o zawartosci 17% Si02, w takiej ilosci aby gestosc przygotowanej kompozycji powlokowej wynosila od 1,5 do 1,6 g/cm3. Tak przygotowana kompo¬ zycje powlokowa nanosi sie na powierzchnie form i rdzeni odlewniczych przez nakladanie pedzlem lub metoda natryskowa. Formy pokryte powloka ochronna wedlug wynalazku, przed zalaniem metalem poddaje sie suszeniu w temperaturze 250—300°C, podczas którego roztwór koloidalny krzemionki wiaze powloke. PL PLPriority: Application announced: March 15, 1973 The patent description was published: June 3, 1974 U. 31 ^, 3/00 MKP B22c 3/00 READING ROOM of the Patent Office of the Inventors: Stanislaw Strama, Jerzy Knapik, Zbigniew Gawlikowski, Jerzy Salwa Authorized by a temporary patent: Huta them. Lenina, Kraków (Poland) Protective coating, especially for the forms of heavy pig iron and iron castings The subject of the invention is a protective coating, especially for the forms of heavy pig iron and iron castings. and the binding agent of refractory clay, concreteite or sulphite clay - they do not protect the form of heavy castings against the formation of surface defects, mainly burns and casting scabs. These disadvantages significantly reduce the utility value of castings, and their removal is labor-intensive. The aim of the invention is to eliminate the above-mentioned disadvantages, and the technical task is to develop a protective coating with high adhesion and resistant to strong thermal radiation and significant static pressure of metal. This task was solved thanks to this. that for the protective coating components used so far, such as technical talc, zirconium flour, aluminum oxide, coke dust or graphite, an aqueous solution of colloidal silica with a content of up to 30% SiO2 is used, which after drying binds the coating. Silica colloidal solution, being stable or non-coagulating during storage, can be obtained from metallic silicon by dissolving it in aqueous ammonia solutions or other methods known from the literature and the practice, for example, by the methods of U.S. Pat. Nos. 2,614,993, 2,614,994, 2,614,995 and 2572578. Example. The coating according to the invention is made in equal parts by weight of technical talc, silver graphite and coke dust with a maximum grain size of 0.2 mm. After these components have been thoroughly mixed, an aqueous silica colloidal solution containing 17% SiO 2 is added in such an amount that the density of the prepared coating composition is 1.5 to 1.6 g / cm 3. The thus prepared coating composition is applied to the surfaces of casting molds and cores by brushing or by spraying. The molds coated with a protective coating according to the invention are dried at a temperature of 250-300 ° C before being poured over with metal, during which the silica colloidal solution binds the coating. PL PL
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PL14385070A PL70530B2 (en) | 1970-10-10 | 1970-10-10 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PL14385070A PL70530B2 (en) | 1970-10-10 | 1970-10-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| PL70530B2 true PL70530B2 (en) | 1974-04-30 |
Family
ID=19952554
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PL14385070A PL70530B2 (en) | 1970-10-10 | 1970-10-10 |
Country Status (1)
| Country | Link |
|---|---|
| PL (1) | PL70530B2 (en) |
-
1970
- 1970-10-10 PL PL14385070A patent/PL70530B2/pl unknown
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