DE2323073A1 - Ground glass frit for covering molten metal - to protect against oxidation during melting - Google Patents

Ground glass frit for covering molten metal - to protect against oxidation during melting

Info

Publication number
DE2323073A1
DE2323073A1 DE19732323073 DE2323073A DE2323073A1 DE 2323073 A1 DE2323073 A1 DE 2323073A1 DE 19732323073 DE19732323073 DE 19732323073 DE 2323073 A DE2323073 A DE 2323073A DE 2323073 A1 DE2323073 A1 DE 2323073A1
Authority
DE
Germany
Prior art keywords
sio2
molten metal
glass frit
protect against
ground glass
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.)
Pending
Application number
DE19732323073
Other languages
German (de)
Inventor
Rosolde Hill
Volker Dr Koehne
Antonio Leogrande
Wolf Dipl Ing Dr Wunder
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ver Deutsche Metallwerke AG
Original Assignee
Ver Deutsche Metallwerke AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Ver Deutsche Metallwerke AG filed Critical Ver Deutsche Metallwerke AG
Priority to DE19732323073 priority Critical patent/DE2323073A1/en
Priority to AT797673A priority patent/AT331528B/en
Priority to IT2899573A priority patent/IT995418B/en
Priority to GB4428073A priority patent/GB1421042A/en
Priority to FR7333749A priority patent/FR2200213B1/fr
Priority to NL7313048A priority patent/NL7313048A/xx
Priority to CH1356873A priority patent/CH581197A5/xx
Publication of DE2323073A1 publication Critical patent/DE2323073A1/en
Priority to US05/578,945 priority patent/US3976474A/en
Pending legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
    • C22B9/10—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals with refining or fluxing agents; Use of materials therefor, e.g. slagging or scorifying agents
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • E05F1/00—Closers or openers for wings, not otherwise provided for in this subclass
    • E05F1/08—Closers or openers for wings, not otherwise provided for in this subclass spring-actuated, e.g. for horizontally sliding wings
    • E05F1/10—Closers or openers for wings, not otherwise provided for in this subclass spring-actuated, e.g. for horizontally sliding wings for swinging wings, e.g. counterbalance

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Glass Compositions (AREA)

Abstract

Glass of compsn. 10-70% B2O3, 5-65% SiO2 and 5-40% Na2O, K2O and/or Li2O is used as an oxidation protective cover for molten metals such as brass. The glass has a low m.pt. so that its viscosity is low at the working temp. hence it flows freely over the surface of the melt allowing additions to be made and gas bubbles to escape readily yet not entering the melt.

Description

Abdeckmittel für Metallschmelzen Die Erfindung betrifft ein Abdeckmittel für die Oberfläche von Metall- und Legierungsschmelzen, insbesondere für solche aus Messingeinsatzstoffen, bestehend aus vorgeschmolzenen, homogenen und feingemahlenen Alkaliborosilikatgläsern nach Patent . ... Co. (Patentanmeldung P 22 46 723.8)o Unter den im Hauptpatent behandelten Ausführungsformen des Abdeckmittels sind uOae Alkaliborosilikatgläser in den Dreistoffsystemen (A) Na2O - B203 - SiO2 oder (B) K20 - B203 S SiO2 mit folgender Zusammensetzung beschrieben: (A) Na2O 30 bis 38 % 3203 12 bis 65 % SiO2 5 bis 60 % (B) K20 30 bis 40 % B2O3 10 bis 70 % SiO2 5 bis 60 % Es wurde nun gefunden, daß die gleichen Vorteile hinsichtlich eines wirksamen Oxidationsschutzes, einer guten Benetzung bei niedrigem Erweichungspunkt und niedriger Viskosität wie beim Hauptpatent erreicht werden, wenn die Alkaliborosilikatgläser in den Dreistoffsystemen (A) Na20 - B203 - Si02 oder (B) K2O - B2O3 - SiO2 erfindungsgemäß folgende Zusammensetzung aufweisen: (A) Na20 10 bis weniger als 30 % B203 10 bis 70 % SiO2 5 bis 60 % (B) K20 10 bis weniger als 30 % B203 10 bis 70 % SiO2 5 bis 60 % Gegebenenfalls ist es auch möglich, das Na20 teilweise durch K2O oder ganz oder teilweise durch LiO2 zu ersetzen. Covering means for molten metals The invention relates to a covering means for the surface of metal and alloy melts, especially for those Made of brass feedstocks, consisting of premelted, homogeneous and finely ground Alkali borosilicate glasses according to patent. ... Co. (patent application P 22 46 723.8) o Among the embodiments of the covering means dealt with in the main patent are uOae Alkali borosilicate glasses in the three-component systems (A) Na2O - B203 - SiO2 or (B) K20 - B203 S SiO2 with the following composition: (A) Na2O 30 to 38 % 3203 12 to 65% SiO2 5 to 60% (B) K20 30 to 40% B2O3 10 to 70% SiO2 5 to 60% It has now been found that the same advantages in terms of an effective Oxidation protection, good wetting with a low softening point and lower Viscosity as with the main patent can be achieved if the alkali borosilicate glasses in the three-component systems (A) Na20 - B203 - Si02 or (B) K2O - B2O3 According to the invention, SiO2 have the following composition: (A) Na20 10 to less than 30% B203 10 to 70% SiO2 5 to 60% (B) K20 10 to less than 30% B203 10 up to 70% SiO2 5 to 60% If necessary, it is also possible to partially use the Na20 to be replaced by K2O or in whole or in part by LiO2.

In besonderen Fällen kann an die Stelle von Na2O auch ein Gemisch aus Na20, K20 und LiO2 treten.In special cases a mixture can be used instead of Na2O emerge from Na20, K20 and LiO2.

Die erfindungsgemäße Zusammensetzung ist in der Zeichnung beispielhaft dargestellt und wird anhand von drei Ausführungsbeispielen im folgenden naher erläutert.The composition according to the invention is shown by way of example in the drawing and is explained in more detail below with reference to three exemplary embodiments.

1e Ausführungsbeispiel Abdeckglas bestehend aus 35,2 % SiO2 41,0 % B2O3 23,8 % Na2O Körnung: 60 pm Erweichungspunkt: 6800C Viskosität bei 7500C 6000 Poise-Krätzeanfall bei 0,5 % 2,51 % bezogen auf den Abdeckmittel-Zugabe zu Gesamteinsatz Messingspänen Ms58: 5,31 % bezogen auf den Versatz 2. Ausführungsbeispiel Krätzeanfall bei 1,0 % Abde ckmittel-Zugabe der Zusammensetzung wie.im 2,20 % bezogen auf den Ausführungsbeispiel 1 Gesamteinsatz zu Messingspänen Ms58: 4,69 % bezogen auf den Versatz 3. Ausführungsbeispiel Abdeckglas bestehend aus 55,0 % SiO2 18,0 % B203 27,0 % Na2O Körnung: <60 µm Erweichungspunkt: 770 C Viskosität bei 8500C 5500 Poise Krätzeanfall bei 0,5 % 3,24 % bezogen auf den Abdeckmittel-Zugabe zu Gesamteinsatz Messingspänen Ms58: 6,83 % bezogen auf den Versatz Patentansprüche1st embodiment cover glass consisting of 35.2% SiO2 41.0% B2O3 23.8% Na2O grain size: 60 pm Softening point: 6800C Viscosity at 7500C 6000 Poise dross incidence at 0.5% 2.51% based on the addition of covering agent to the total application Brass chips Ms58: 5.31% based on the offset 2nd embodiment Dross incidence when 1.0% masking agent is added to the composition as related to 2.20% based on exemplary embodiment 1, total input to brass chips Ms58: 4.69% on the offset 3rd embodiment cover glass consisting of 55.0% SiO2 18.0 % B203 27.0% Na2O grain size: <60 µm Softening point: 770 C Viscosity at 8500C 5500 poise dross incidence at 0.5% 3.24% based on the addition of covering agent Total use of brass chips Ms58: 6.83% based on the offset claims

Claims (3)

PATENTANSPRÜCHE 1) Abdeckmittel für die Oberfläche von Metall- und Legierungsschmelzen, insbesondere für solche aus Messingeinsatzstoffen, bestehend aus vorgeschmolzenen, homogenen und feingemahlenen Alkaliborosilikatgläsern nach Patent . ... ... (Patentanmeldung P 22 46 72308), gekennzeichnet durch die im Dreistoffsystem Na29 - B203 - SiO2 liegende Zusammensetzung 10 30 % Na2O, 10 bis 70 % B2O3, 5 bis 60 % SiO2.PATENT CLAIMS 1) Covering agent for the surface of metal and alloy melts, in particular for those made of brass feedstocks, consisting of pre-melted, homogeneous and finely ground alkali borosilicate glasses according to the patent. ... ... (patent application P 22 46 72308), characterized by the composition 10, which is in the three-component system Na29 - B203 - SiO2 30% Na2O, 10 to 70% B2O3, 5 to 60% SiO2. 2) Abdeckmittel nach Anspruch 1, dadurch gekennzeichnet, daß Na2O ganz oder teilweise durch K20 ersetzt ist.2) covering means according to claim 1, characterized in that Na2O has been replaced in whole or in part by K20. 3) Abdeckmittel nach Anspruch 1, dadurch gekennzeichnet, daß das Na20 ganz oder teilweise durch LiO2 ersetzt istx 4) Abdeckmittel nach den Ansprüchen 1 bis 3, gekennzeichnet durch ein Gemisch aus Na20, K20 und LiO2.3) covering means according to claim 1, characterized in that the Na20 is completely or partially replaced by LiO2x 4) Covering means according to the claims 1 to 3, characterized by a mixture of Na20, K20 and LiO2.
DE19732323073 1972-09-22 1973-05-08 Ground glass frit for covering molten metal - to protect against oxidation during melting Pending DE2323073A1 (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
DE19732323073 DE2323073A1 (en) 1973-05-08 1973-05-08 Ground glass frit for covering molten metal - to protect against oxidation during melting
AT797673A AT331528B (en) 1972-09-22 1973-09-14 COVER FOR METAL MELT
IT2899573A IT995418B (en) 1972-09-22 1973-09-18 COVERING AGENT FOR METALLIC MELTS
GB4428073A GB1421042A (en) 1972-09-22 1973-09-20 Method of protecting metal melts
FR7333749A FR2200213B1 (en) 1972-09-22 1973-09-20
NL7313048A NL7313048A (en) 1972-09-22 1973-09-21
CH1356873A CH581197A5 (en) 1972-09-22 1973-09-21
US05/578,945 US3976474A (en) 1972-09-22 1975-05-19 Covering layer for metallic baths

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19732323073 DE2323073A1 (en) 1973-05-08 1973-05-08 Ground glass frit for covering molten metal - to protect against oxidation during melting

Publications (1)

Publication Number Publication Date
DE2323073A1 true DE2323073A1 (en) 1974-11-28

Family

ID=5880259

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19732323073 Pending DE2323073A1 (en) 1972-09-22 1973-05-08 Ground glass frit for covering molten metal - to protect against oxidation during melting

Country Status (1)

Country Link
DE (1) DE2323073A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0272552A2 (en) * 1986-12-22 1988-06-29 Abbott Laboratories Method and device for ketone measurement
DE3736843A1 (en) * 1987-10-30 1989-05-11 Asea Brown Boveri METHOD FOR JOINING METAL AND CERAMIC MATERIALS

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0272552A2 (en) * 1986-12-22 1988-06-29 Abbott Laboratories Method and device for ketone measurement
EP0272552A3 (en) * 1986-12-22 1989-05-31 Abbott Laboratories Method and device for ketone measurement
DE3736843A1 (en) * 1987-10-30 1989-05-11 Asea Brown Boveri METHOD FOR JOINING METAL AND CERAMIC MATERIALS

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