CH290788A - Process for forming a hard deposit on the surface of a metallic object. - Google Patents

Process for forming a hard deposit on the surface of a metallic object.

Info

Publication number
CH290788A
CH290788A CH290788DA CH290788A CH 290788 A CH290788 A CH 290788A CH 290788D A CH290788D A CH 290788DA CH 290788 A CH290788 A CH 290788A
Authority
CH
Switzerland
Prior art keywords
hard
deposit
paste
forming
hard deposit
Prior art date
Application number
Other languages
French (fr)
Inventor
Kramer Paul
Original Assignee
Kramer Paul
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 Kramer Paul filed Critical Kramer Paul
Publication of CH290788A publication Critical patent/CH290788A/en

Links

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
    • C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
    • C23C28/04—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings of inorganic non-metallic material

Landscapes

  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Polishing Bodies And Polishing Tools (AREA)

Description

  

  Procédé pour la formation d'un dépôt dur<B>à</B> la surface d'un objet métallique.    La présente invention concerne un procédé  pour la formation d'un dépôt dur<B>à</B> la surface  d'un objet métallique, caractérisé par le fait  qu'une pâte, constituée par un mélange com  prenant au moins     -Lm    composé binaire non  oxygéné, dur et réfractaire, de l'acide borique  et un liant organique, est déposée     sur    la sur  face     dudit    objet et chauffée, d'abord douce  ment, puis fortement jusqu'à élimination du  liant organique et formation d'un dépôt     cohé-          rant    dur, adhérant fermement au métal     sous-          jaeent.     



  La pâte contient avantageusement, en  outre, une faible dose d'un ou plusieurs corps  qui régularisent la fusion<B>à</B> chaud, donnent<B>à.</B>  la pâte durcie une certaine -cohésion avant  fusion, protègent le métal contre l'oxydation  et évitent la formation de bulles; -ces corps  peuvent être soit des métaux très volatils<B>à</B>  chaud, tels que zinc, magnésium, soit des  acides, bases et sels.  



       Voiei,   <B>à</B> titre d'exemple, un mode de pré  paration d'une pâte utilisable pour exécuter  le procédé selon l'invention.  



  Un mélange homogène et en poudre très  fine d'au moins un carbure ou     siliciure    ou  borure métallique ou     métalloidique,    tel que  carbure de tungstène, titane, vanadium, bore,       été.,    et de cobalt (qui joue ici un rôle de  liant), est mélangé<B>à</B> une résine     phénolaldé-          hydique    et de l'acide borique en poudres. On  humecte le mélange au moyen     d#un    solvant de    la résine     phénolaldéhydique,    par exemple de  l'alcool. Ledit mélange est alors malaxé -en  pâte et est prêt<B>à</B> l'emploi.  



  La formation du dépôt dur sur l'objet  métallique s'opère de la façon suivante:  La pièce<B>à</B> durcir, bien nettoyée et décapée  sur la partie<B>à</B> durcir, est recouverte     sur    la  dite partie d'une couche de ladite pâte. On  échauffe doucement ledit endroit et la pâte  qui s'y trouve pour éliminer l'alcool, puis,  pendant quelques minutes<B>à 150 à</B> 2000<B>C</B> pour  polymériser la résine     phénolaldéhydique.    La  pâte durcit et adhère<B>à</B> la pièce métallique.  Puis on chauffe<B>à</B> haute température. Le corps  organique brûle, le dépôt s'échauffe, mais  garde quand même -sa cohésion grâce<B>à</B> l'acide  borique. Le dépôt devient incandescent. On  continue de chauffer. Une légère ébullition se  manifeste<B>à</B> la surface du dépôt.

   On chauffe  encore quelques instants et on laisse refroidir.  Après rectification<B>à</B> la meule, le dépôt est  terminé.



  Process for forming a hard deposit <B> on </B> the surface of a metallic object. The present invention relates to a process for the formation of a hard deposit <B> on </B> the surface of a metal object, characterized in that a paste, consisting of a mixture comprising at least -Lm compound binary non-oxygenated, hard and refractory, boric acid and an organic binder, is deposited on the surface of said object and heated, first gently, then strongly until elimination of the organic binder and formation of a deposit cohesive hard, adhering firmly to the underlying metal.



  The paste advantageously contains, in addition, a small dose of one or more substances which regulate the hot melting <B> to </B>, give <B> to. </B> the hardened paste a certain cohesion before melting , protect the metal against oxidation and prevent the formation of bubbles; -these bodies can be either very volatile <B> to </B> hot metals, such as zinc, magnesium, or acids, bases and salts.



       Way, <B> à </B> by way of example, a method of preparing a paste which can be used to carry out the process according to the invention.



  A homogeneous and very fine powder mixture of at least one carbide or silicide or metal or metalloidal boride, such as tungsten carbide, titanium, vanadium, boron, summer., And cobalt (which here acts as a binder), is mixed <B> with </B> a phenolaldehyde resin and boric acid powder. The mixture is wetted with a solvent for the phenolaldehyde resin, for example alcohol. Said mixture is then kneaded into a paste and is ready <B> for </B> use.



  The formation of the hard deposit on the metal object takes place as follows: The part <B> to </B> harden, well cleaned and pickled on the part <B> to </B>, is covered on said part of a layer of said paste. The said place and the paste therein are gently heated to remove the alcohol, then, for a few minutes <B> to 150 to </B> 2000 <B> C </B> to polymerize the phenolaldehyde resin. The paste hardens and adheres <B> to </B> the metal part. Then we heat <B> to </B> high temperature. The organic body burns, the deposit heats up, but still retains its cohesion thanks to <B> </B> boric acid. The deposit becomes incandescent. We continue to heat up. A slight boiling occurs <B> at </B> the surface of the deposit.

   Heat for a few more moments and allow it to cool. After grinding <B> at </B> the grinding wheel, the deposit is finished.

Claims (1)

REVENDICATION: Procédé pour la formation d'un dépôt dur <B>à</B> la surface d'un objet métallique, -caractérisé par le fait qu'une pâte, constituée par un mélange comprenant au moins un<B>composé</B> binaire non oxygéné, dur et réfractaire, de l'acide borique et un liant organique, est dé- ,posée sur la surface dudit objet et -chauffée, d'abord douce ment, puis fortement jusqu'à élimination du liant organique et formation d'un dépôt dur, adhérant fermement au métal sous-jacent. CLAIM: Process for the formation of a hard deposit <B> on </B> the surface of a metal object, -characterized in that a paste, consisting of a mixture comprising at least one <B> compound < / B> non-oxygenated binary, hard and refractory, boric acid and an organic binder, is deposited on the surface of said object and -heated, at first gently, then strongly until elimination of the organic binder and forming a hard deposit, firmly adhering to the underlying metal. SOUS-REVENDICATION: Procédé selon la revendication, -caractérisé par le fait que la pâte contient, outre ledit composé binaire, #è1u cobalt, une résine phénol- aldéhydique et de l'acide borique, comme liants, le tout humecté- d'alcool. SUB-CLAIM: Process according to claim, -characterized in that the paste contains, in addition to said binary compound, # è1u cobalt, a phenol-aldehyde resin and boric acid, as binders, all moistened with alcohol .
CH290788D 1949-01-07 1949-09-29 Process for forming a hard deposit on the surface of a metallic object. CH290788A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR290788X 1949-01-07
CH284509T 1949-09-29

Publications (1)

Publication Number Publication Date
CH290788A true CH290788A (en) 1953-05-15

Family

ID=25732441

Family Applications (1)

Application Number Title Priority Date Filing Date
CH290788D CH290788A (en) 1949-01-07 1949-09-29 Process for forming a hard deposit on the surface of a metallic object.

Country Status (1)

Country Link
CH (1) CH290788A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2414977A1 (en) * 1978-01-24 1979-08-17 Voitas Edward DRILL SLEEVES, PUMP SEALS AND SIMILAR OBJECTS AND PROCESS FOR THEIR MANUFACTURING

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2414977A1 (en) * 1978-01-24 1979-08-17 Voitas Edward DRILL SLEEVES, PUMP SEALS AND SIMILAR OBJECTS AND PROCESS FOR THEIR MANUFACTURING

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