BE445711A - - Google Patents
Info
- Publication number
- BE445711A BE445711A BE445711DA BE445711A BE 445711 A BE445711 A BE 445711A BE 445711D A BE445711D A BE 445711DA BE 445711 A BE445711 A BE 445711A
- Authority
- BE
- Belgium
- Prior art keywords
- carbon
- rods
- welding
- carbon content
- weld
- Prior art date
Links
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 17
- 229910052799 carbon Inorganic materials 0.000 claims description 16
- 239000000463 material Substances 0.000 claims description 6
- 238000003466 welding Methods 0.000 claims description 6
- 239000011324 bead Substances 0.000 claims description 3
- 229910000851 Alloy steel Inorganic materials 0.000 claims 1
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 239000004922 lacquer Substances 0.000 description 3
- 229910000679 solder Inorganic materials 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910019582 Cr V Inorganic materials 0.000 description 1
- 229910017318 Mo—Ni Inorganic materials 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000000875 corresponding Effects 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000001617 migratory Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 230000001681 protective Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 230000003313 weakening Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/36—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest
- B23K35/365—Selection of non-metallic compositions of coating materials either alone or conjoint with selection of soldering or welding materials
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Nonmetallic Welding Materials (AREA)
Description
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Electrode-pour souder les alliages d'aciers durs.
Les alliages d'aciers durs établis sur la base de Cr-Mo, Cr-Mo-V, Cr-V, Cr-Mo-Ni avec teneurs en carbone com- prises entre 0,2 à 0,5% correspondant à peu près aux normes des ingénieurs allemands 1662, 1663 et aux substances migratoires 1450, 52, 53, 54, 55, 56, 60, 1604, 06, 10, 30'et 50,sont avantageusement soudés à l'arc atomique , parce que seul le gaz protecteur utilisé permet d'éviter que les constituants des alliages soient brûlés, et qu'il en résulte un cordon de soudure de qualité inférieure. En sou-
<Desc/Clms Page number 2>
dant à l'arc atomique,. on ne peut pas éviter cependant un af- faiblissement de la teneur en carbone au point où se fait la soudure.
C'est pourquoi, on a déjà essayé de remédier à cet inconvénient, en utilisant des apports de soudure sous forme de baguettes présentant une teneur en carbone plus élevée que @ la matière de base. Lorsqu'on soude des tales à faible teneur en carbone, cette méthode donne d'assez bons résultats. Mais comme la teneur en carbone des baguettes doit être au moins le double de celle de la matière soudée, il faudrait utiliser pour des parties à souder ayant des teneurs en carbone de 0,4 @ et 0,5%, des baguettes ayant une teneur en carbone tellement considérable que leur fabrication par laminage ou par étirage se heurterait à des difficultés considérables. Ceci s'appli- que surtout aux baguettes qui, à côté du carbone, contien- nent également tous les autres éléments d'alliage de la ma- tière soudée.
Conformément à l'invention, la diminution de la teneur en carbone dans le joint de soudure peut être évitée en uti- lisant des baguettes de soudure comme d'ordinaire, c'est à dire ayant la même composition chimique que la matière de base, mais munies d'une couche de carbone. cette couche peut être obtenue par exemple en immergeant les électrodes déjà montées dans leur système de serrage, et juste avant d'effectuer la soudure, dans une suspension de graphite dans un agent de dis- persion approprié tel que l'eau, l'huile, la résine synthétique.
Il estalors facile de déposer de, cette manièrejusqu'à 4% de carbone, quantité rapportée au poids de l'électrode. Lorsqu'on emploie comme liant une laque, de préférence séchant rapidement, comme par exemple une laque au collodion, les électrodes peuvent alors être recouvertes de carbone longtemps avant leur tilisa- tion, de manière à pouvoir les stocker. Le revêtement préconisé
<Desc/Clms Page number 3>
par l'invention peut évidemment être rapporté même sur un fil àcouder avant une teneur élevée en carbone.
On arrive ainsi à déposer une quantité lndéterminée de carbone dans le joint de soudure, ce qui permet d'obtenir des cordons de soudure ayant la même résistance que celles des matières de baise, Liais lorsqu'on veut obtenir une meilleure di- latation pour une résistance plus faible, ou une meilleure ré- sistance pour améliorer les qualités de la soudure, ceci est également réalisable grâce aux mesures qui viennent d'être mentionnées plus haut.
<Desc / Clms Page number 1>
Electrode - for welding alloys of hard steels.
Alloys of hard steels established on the basis of Cr-Mo, Cr-Mo-V, Cr-V, Cr-Mo-Ni with carbon contents between 0.2 to 0.5% corresponding approximately to the standards of German engineers 1662, 1663 and to migratory substances 1450, 52, 53, 54, 55, 56, 60, 1604, 06, 10, 30 'and 50, are advantageously welded with the atomic arc, because only the The protective gas used prevents the constituents of the alloys from being burnt, resulting in an inferior weld bead. In support
<Desc / Clms Page number 2>
dant to the atomic arc ,. a weakening of the carbon content at the point where the weld takes place cannot, however, be avoided.
This is why attempts have already been made to remedy this drawback, by using solder additions in the form of rods having a higher carbon content than the base material. When welding low carbon tales, this method works quite well. But since the carbon content of the rods must be at least twice that of the welded material, for parts to be welded having carbon contents of 0.4 @ and 0.5%, rods having a content of carbon so considerable that their manufacture by rolling or drawing would encounter considerable difficulties. This particularly applies to rods which, besides carbon, also contain all the other alloying elements of the welded material.
According to the invention, the decrease in the carbon content in the solder joint can be avoided by using solder rods as usual, i.e. having the same chemical composition as the base material, but provided with a carbon layer. this layer can be obtained for example by immersing the electrodes already mounted in their clamping system, and just before carrying out the welding, in a graphite suspension in a suitable dispersing agent such as water, oil , synthetic resin.
It is then easy to deposit, in this way, up to 4% carbon, an amount based on the weight of the electrode. When a lacquer, preferably a rapidly drying lacquer, such as for example a collodion lacquer, is used as the binder, the electrodes can then be covered with carbon long before their use, so that they can be stored. The recommended coating
<Desc / Clms Page number 3>
by the invention can obviously be attached even on a welding wire before a high carbon content.
It is thus possible to deposit an indefinite quantity of carbon in the weld joint, which makes it possible to obtain weld beads having the same resistance as those of the welding materials, Liais when one wishes to obtain a better expansion for a lower resistance, or a better resistance to improve the qualities of the weld, this is also achievable thanks to the measures which have just been mentioned above.
Claims (1)
Publications (1)
Publication Number | Publication Date |
---|---|
BE445711A true BE445711A (en) |
Family
ID=102030
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BE445711D BE445711A (en) |
Country Status (1)
Country | Link |
---|---|
BE (1) | BE445711A (en) |
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0
- BE BE445711D patent/BE445711A/fr unknown
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