BE334624A

BE334624A -

Info

Publication number: BE334624A
Authority: BE
Priority date: 1925-06-10
Also published as: FR617237A

Description

       

  PROCEDE POUR EMPECHER DES INCLUSIONS NUISIBLES DANS LES SOU-DURES.

  
On sait que dans les procédés de soudure aux gaz et à l'électricité,la soudure devient fragile même en cas de faible teneur en carbone.La résistance est,il est vrai,en beaucoup

  
de cas,renforcée,mais la ténacité est fortement altérée. Il a été établi que cette fragilité de la soudure provient principalement de l'absorption d'oxygène et d'azote de l'atmosphère. Une seconde circonstance qui influence désavantageusement la qualité de la soudure consisté-en ce que dans là soudure par fusion,la soudure est constituée à proprement parler d'acier coulé,qui ne subit par la suite aucun travail,et montre aussi

  
 <EMI ID=1.1> 

  
Grâce à cette invention,ces deux inconvénients sont supprimés,en employant comme baguette de métal d'apport un a-

  
 <EMI ID=2.1> 



  PROCEDURE FOR PREVENTING HARMFUL INCLUSIONS IN WELDS.

  
It is known that in gas and electric welding processes, the weld becomes brittle even with low carbon content.The resistance is, it is true, in many

  
case, strengthened, but the tenacity is strongly impaired. It has been established that this brittleness of the weld comes mainly from the absorption of oxygen and nitrogen from the atmosphere. A second circumstance which influences the quality of the weld disadvantageously is that in fusion welding, the weld consists strictly speaking of cast steel, which subsequently does not undergo any work, and also shows

  
 <EMI ID = 1.1>

  
Thanks to this invention, these two drawbacks are eliminated, by employing as a filler metal rod an a-

  
 <EMI ID = 2.1>

Claims

part of molybdenum-vanadium-titanium-zircon. The rod must contain at least one metal from each of these two groups. But <EMI ID = 3.1>

eg nickel and molybdenum, nickel and vanadium, nickel and titanium, nickel-molybdenum and vanadium, nickel or cobalt and molybdenum- <EMI ID = 4.1>

Alloy elements one obtains on the one hand that the gases are not absorbed or are immediately separated back into the slag, and on the other hand that the texture of the molten solder becomes finer. As examples of the composition of these rods of filler metal, the following can be cited: Oarbon = O, IO%, Nickel = 3.0%, Molybdenum = 0.10% or Carbon = 0.10%, Nickel

CLAIMS.

I. Method for preventing harmful inclusions in welds, characterized in that the steels intended to form the rods of filler metal for welds to

gas or electricity contain molybdenum and nickel or cobalt or manganese.

2.Process for preventing harmful inclusions in welds, characterized in that for gas or electric welds, rods of filler metal are used which contain at least one metal on the one hand of the group: nickel or cobalt or manganese, on the other hand from the group molybdenum, vanadium, titanium, zircon.