SU804300A1 - Welding wire alloy - Google Patents

Description

(54) ALLOY FOR WELDING WIRE

The invention relates to welding materials from copper-nickel alloys, which are used in shipbuilding and mechanical engineering.

Alloy 1 is known for the manufacture of marine seawater pipelines of the following composition, wt%: Nickel V 6-10 Manganese 0.3-0.6

Aluminum-3-0.9

Iron0.05-0.8

Tin 0,01-0,5

Phosphorus 0.02-0.07

CopperE rest

Ship pipelines are welded structures of pipes of various sizes. However, the welding wire of a known alloy has not been developed. In the development of wires, the following factors should be taken into account: the possibility of poro- and cracking during welding, the burning of aluminum, as well as the provision of the necessary manufacturability in the manufacture of wire.

The goal is achieved by the fact that the weld metal while maintaining high plastic properties, increasing the corrosion resistance of the compound, the alloy additionally contains silicon at

the following ratio of the component | 1tov, bc%:

Nickel 6-13

Aluminum 0.5-1.2

Iron0.5-1.2

Manganese 0.5-1.2

Phosphorus 0.01-0.06

tin. 0.05-0.5

Silicon0.05-0.3

0

Copper. The rest

It is known that nickel improves the mechanical properties of copper alloys and their resistance to corrosion.

Common corrosion of copper-nickel

5 alloys and corrosion in the flow of seawater decrease with increasing nickel content.

The content of aluminum in the welding wire makes it possible to increase the corrosion properties of the weld metal. Increased resistance to corrosion in sea water of copper alloys containing aluminum, due to the inhibition of anodic processes by forming on

5 surface resistant, self-healing dense and durable protective film, which significantly increases the corrosion resistance of the weld metal. Aluminum content

0 wire should be limited to 1.2%, since exceeding this limit leads to a decrease in manufacturability. The addition of iron significantly increases the resistance of copper-nickel alloys to jet corrosion in seawater, contributes to the grinding of grain, and also affects the mechanical properties of the weld metal. Iron in solid solution can effectively increase the corrosion resistance of copper-nickel alloys. Therefore, the iron content in the wires should be limited to 1.2%, since at its higher content in the structure of the seam an excessive glandular phase appears, which sharply worsens the corrosion resistance. Manganese in an amount of up to 1-1.5% is usually introduced into copper-nickel alloys to improve the mechanical properties and corrosion resistance of the weld metal. In copper-nickel alloys, the addition of manganese up to 1% eliminates the harmful effects of carbon and sulfur. Silicon stabilizes the grain size, contributes to the elimination of different grain sizes of the structure after welding and reduces the spread of mechanical properties. In addition, silicon during smelting is a deoxidizing agent and improves the quality of the weld metal. AmountProvo6, 0 1.2 0.85 1.2 0.275 0.3 Lok

about the same 9.5 0,851,20,85 0,05 0,175 0,06 The same

 6.0 0.50.50.2 0.5 0.3 0.01, 5 0.50.851.2 0.275 0.05 0.02. .

h

“-

. 9.5 1,20,50,5 0,5 0,3 0,035 -

13.0 0.50,850.55 0.275 0.3 0.01

13.0 0.850.851.2 0.05 0.175 0.01

Claims (1)

Invention Formula An alloy for welding wire is preferable. But for welding of copper-nickel alloys containing nickel, aluminum, iron, manganese, phosphorus, tin, copper, which differs with heme, with the aim of increasing the strength of the weld metal while maintaining its high level. 37,00,026 35,00,025 33,00,024 35,00,022 34,00,022 to their. plastic properties; increase of corrosion resistance of a welded joint; alloy additionally with; keeps silicon at the following ratio of components, wt.%: Nickel6-13 Aluminum 0.5-1; Iron0.5-1.2 Manganese is 0.5-1.2 in silicon in wire should be limited to 0.3%, since exceeding this limit leads to the formation of hot weld cracks during welding. Tin increases the ductility of the alloy, which positively loses its workability in the manufacture of wire. In addition, small amounts of tin can eliminate corrosion cracking. Phosphorus, being a deoxidizing agent, improves the quality of the weld metal and positively affects its corrosion resistance. To obtain a wire, mixtures of copper-based ingredients were prepared with nickel, aluminum, iron, manganese, tin, silicon and phosphorus content in the upper, middle, and lower limits (see table). The mixtures are prepared in an open induction furnace, in a graphite crucible under a layer of charcoal. Casting produces cylindrical metal molds. The ingots are made into checkers, which are pressed on a vertical hydraulic press. Pressed billet drag on the wire with a diameter of 4 mm. The wire is used for welding pipes made of BS-3 alloy. 0.035 Else 37.0 32.0 0.026 Phosphorus 0.01-0.06 Tin 0.05-0.5 Silicon 0.05-0.3 Copper Else Sources of information taken into account during the examination 1, USSR Author's Certificate 511367 , cl. C 22 C. 09/06, 1974.