SU882086A1 - Tubular solder composition for soldering copper and alloys - Google Patents

Description

one

The invention relates to the field of high-temperature soldering of copper and its alloys, in particular to the composition of tubular solder, and can be used in the electronic, electrical, aviation, industry and other branches of the national economy.

Solders are known for soldering copper and its alloys on the basis of the Cu-P system; C - P-Zn; C-R-Sb; C-R-Ag Ij.

The disadvantage of solders is their relatively low ductility, which does not allow nolowers to obtain rods from them by existing processing methods, for example, by rolling, by drawing.

When silver is introduced, the plasticity of copper-phosphorous solders increases, which makes it possible to make wire from them and other profiles by these methods, but the presence of silver increases the cost of these solders.

Nowadays, Cu – P solders are widely used in industry instead of expensive and scarce silver solders; C - R - S; C - P-Zn; C-R-Sb; C-R-Sn and others. The above-mentioned solders in the form of rods or wires with a diameter of 1.2 to 3.0 mm have the greatest need.

which can be used to mechanize the soldering process. Obtaining such bars by casting is impossible. In this connection, obtaining small diameters of copper-phosphorous solders is possible only by making tubular solder. Known tubular solder consisting of a core containing a powder of an alloy of composition, wt. %: P-15; C - the rest

10 and a shell consisting of an alloy of composition, wt. %: Sn-8; P-0,2; Si the rest. The disadvantages of the tubular solder of this composition are the embrittlement of the seam of the joints due to the addition of tin, which is part of the shell, as well as the high cost of thermal energy required for the preliminary melting of the tubular solder (T. Pl. 8% wt.% Sn-0 , 2 wt.% Р 1035 ° С; t. Pl.

20 C-15 weight. % P 1020 ° C), the technological difficulty of obtaining powder Cu is 15 wt. % P, tin deficiency.

The aim of the invention is to increase the ductility of the weld seam while maintaining the high strength of the solder joint, reducing the amount of heat energy required to begin melting the solder, preventing oxidation of the metal portion of the core, and increasing the filling ratio of the core. The goal is achieved by the fact that the tubular solder composition consisting of a shell and a core containing a powder of copper fumed solder contains a brass shell, and the core additionally contains copper phosphide powder, nickel powder, a fluoroborate flux oxide and the following composition of tubular iriio, wt. %: Powder of copper-silica-phosphorous solder 5 -10 Powder of technical phosphide of copper25-30 Powder of nickel 3 -8 Gumboil 5-10 Brass shellEverything else. With this tubular solder composition, high strength (kgf / mm) is maintained, the melting temperature is 730h-760 ° C, the solder is held in wide gaps (up to 0.6 mm), and it is also possible to use it instead of expensive and scarce silver solders ПСр45, ПСр25, ПСр62 and others. The composition of the core of the proposed tubular priio we introduce the powder of copper-phosphorous solder PMFS6-0.15 (av. St. USSR № 492366 from 09/27/73), which contains copper, phosphorus, silicon with the following ratio of components, weight. %: 6-7.5 Phosphorus 0.1-0.15 Silicon Else. Copper

Table Silicon, which is part of Priio, contributes to the best deoxidation of the weld seam, eliminates nuclei of pore formation and non-penetration, reduces porosity and provides high strength of the solder joints. Technical phosphide copper CusP, which is added to the core as a final blend, is obtained from industrial waste of elemental phosphorus, namely, by treatment with a solution of sulfate. Medium phosphoric sludge. Technical copper phosphide is a dark powder with a dispersion of less than 71 microns, consisting of copper phosphide CizP and a mineral part containing fluorides, chlorides and calcium fluorosilicates, aluminum. When soldering, the mineral part expands the range of activity of the flux, improves the wetting by priioem of the scorched material. Technical copper phosphide lowers the melting point of the tubular solder and increases the filling ratio of the core. The nickel added to the core B as a finishing material expands the region of a-solid solutions, thereby contributing to an increase in the plasticity of the weld seam, and reduces the core melting temperature. Fluorobutane class flux (potassium fluoride dehydrated - 33-37%; potassium fluoroborate - 21-25%; boric anhydride - 33-37%), the entrance to the core,

- Optimal composition of tubular solder.

five

; 1 prevents oxidation of the metal part of the core, and also allows soldering without additional fluxing of the metal of the weld seam.

The casing of tubular iripo is made of brass (copper — 59–72%, zinc — the rest: 6 0.15–0.25 mm, L mm). Zinc, which is a part of the brass envelope, expands the area of a-solid solution and increases the ductility of the weld.

The soldering with the proposed tubular solder can be carried out using the same heating method as the solder PSP45, PSP45, PSP62, etc., at a soldering temperature of 750-780 ° C. Immediately, the resistance of the paired compounds of brass L53 with an overlap of lc-1.0-2.0 mm amounts to Tcp 35-h40 KG / MM2.

In laboratory tests, the composition of the proposed tubular solder was varied to select the optimum composition.

The table shows the data on the composition of the tubular solder and the shear resistance of paired joints made of brass L63.

The developed tubular receiver was tested and showed the possibility of its use instead of expensive and scarce silver solders PSP45, PSR62 and others. When soldering medical products, jewelry industry products, and welding radiator assemblies from nickel silver and copper pipelines of refrigeration units, fittings, electrical contacts from steel and tungsten, leads to resistance elements made of copper and other products for electrical, radio equipment.

machine building and other branches of industry.

Tubular solder showed good technological properties when brazing in electric furnaces, brazing with electrical resistivity and using gas-flame heating.

FORUMUA AND 3 ABOUT AND

The composition of the tubular brazing material for copper and its alloys, consisting of a shell and a core, contains a copper-refined nriyos warp, which is due to the fact that, in order to increase the ductility of the weld, to reduce the amount of thermal energy necessary to start melting solder, preventing oxidation of the metal part of the core, increasing the coefficient of filling, contains brass as a shell, the core additionally contains copper phosphide powder, nickel powder, fluoroborate flux in the following ratio SRI komponeptov weight. %: Powder copper-silica phosphate 5 -10

Copper Phosphide Powder25-30

Nickel powder 3-8

Fluoroborate flux5-10

Brass shellEverything else

The sources of information are taken into account during the examination

1. Lakademonsky A.V. and V.E. Reference book, 1, ika, “Mashgiz, 1963,

with. 78-90.

2.Welding Research Supplement, 1977, October, p. 325-330 (prototype).

Claims (1)

The composition of the tubular solder for the punk of copper and its alloys, consisting of a shell and core containing powder of copper-silicon-phosphorous solder, which requires that, in order to increase the ductility of the soldered seam, reduce the amount of thermal energy needed to start melting the solder, prevent oxidation of the metal part of the core, increase the fill factor, it contains brass as a shell, the core additionally contains copper phosphide powder, nickel powder, fluoroborate flux in the following ratio and Component Wt. %: Powder of copper-silicophosphorous solder 5-10 Copper phosphide powder 25-30 Nickel powder 3-8 Fluoroborate flux5-10 Brass shell rest Sources of information taken into account during the examination