30-silver indium-containing brazing filler metal and preparation process thereof

Abstract

The invention discloses a preparation process of 30-silver indium-containing brazing filler metal. The preparation process comprises the following steps that (1) electrolytic copper, silver and No. 1zinc are proportioned according to the proportion and then are melted, and stirring and slag removal are carried out; (2) a mixture of indium, strontium and cerium in a certain proportion is added into a solution in the step (1), and when the melting temperature is 950-980 DEG C, stirring and slag removal are carried out; (3) the discharged solution from the furnace is cast into a rod material with the diameter of 50 mm and the length of 660 mm, the outer oxide skins of the cast rod material is removed, then the cast rod material is cut into small rod materials, and the cut small rod materialsare preheated and then are extruded into wires with the wire diameter of 0.13-0.20 mm in a heating environment; and (4) the wires obtained in the step (3) are drawn into coiled wires by adopting an outer mold under the normal temperature condition. The preparation process has the beneficial effects that the tensile strength of a product is enhanced, the material cost is reduced at the same time,and the welding temperature is reduced.

Description

technical field

[0001] The invention relates to brazing filler metal for welding, in particular to a 30-silver indium-containing brazing filler metal and a preparation process thereof. Background technique

[0002] There are many domestic companies that produce compressor four-way valve bodies, and the solder grades they use are all 34 silver, copper, zinc and tin. Because the brazing filler metal contains tin, the solder joint has a certain degree of brittleness, the shock resistance is not good, and the melting point is relatively high, which makes the use cost of the material relatively high; therefore, there is an urgent need for a solder that can improve the tensile performance of the solder joint. Material, and the production cost of this novel solder can not increase. Contents of the invention

[0003] The purpose of the present invention is to design a 30 silver indium-containing brazing material with relatively convenient processing technology and low cost. [0...

Examples

Embodiment 1

[0014] According to the mass ratio: select the ingredients of electrolytic copper 33%, silver 29%, and zinc 38% to melt, stir and remove slag at 950°C, and adjust the proportion according to the proportion of indium, accounting for 0.7% of the total mass of the solution, and trace elements respectively Choose strontium, which accounts for 0.05% of the total mass of the solution, and cerium, which accounts for 0.08% of the total mass of the solution; the mixture is added to the solution, and the melting temperature is 980°C, then stirred to remove slag, and the solution is cast out of the furnace to form a rod with a diameter of 50mm and a length of 660mm The cast bar is cut off into a small bar with a length of 90mm after removing the outer oxide skin. The cut small bar is preheated at 430°C, and then extruded at a temperature of 440°C in the mold cylinder. The customer requires a wire diameter plus 0.13mm, and the outer mold of the final wire diameter is used to draw it into a...

Embodiment 2

[0016] According to the mass ratio: select the ingredients of electrolytic copper 41%, silver 29%, and zinc 30% to melt and stir at 960°C to remove slag, and then adjust the proportion according to the proportion of indium, accounting for 0.8% of the total mass of the solution, and trace elements respectively Select strontium, which accounts for 0.10% of the total mass of the solution, and cerium, which accounts for 0.10% of the total mass of the solution; add the mixture to the solution, stir and remove the slag when the melting temperature is 970°C, and cast the solution out of the furnace to form a 50mm in diameter and 660mm in length Bar stock, the cast bar stock is cut off into a small bar stock with a length of 100mm after removing the outer scale, preheating the cut bar stock at 430°C, and then extruding it into a mold at a temperature of 440°C. The wire diameter plus 0.20mm is required by the customer, and the outer mold of the final wire diameter is used to draw it int...

Embodiment 3

[0018] According to the mass ratio: select the ingredients of electrolytic copper 35%, silver 31%, zinc 34% to melt, stir and remove slag at 980°C, and adjust the ratio according to the proportion of indium, accounting for 0.95% of the total mass of the solution, and trace elements respectively Select strontium, which accounts for 0.2% of the total mass of the solution, and cerium, which accounts for 0.15% of the total mass of the solution; add the mixture to the solution, stir and remove the slag when the melting temperature is 960°C, and cast the solution out of the furnace to form a 50mm in diameter and 660mm in length Bar stock, the cast bar stock is cut off into a small bar stock with a length of 110mm after removing the outer scale, preheating the cut bar stock at 430°C, and then extruding it into a mold at a temperature of 440°C. The wire diameter plus 0.14mm is required by the customer, and the outer mold of the final wire diameter is used to draw it into coil wire with...

technical field

[0001] The invention relates to brazing filler metal for welding, in particular to a 30-silver indium-containing brazing filler metal and a preparation process thereof. Background technique

[0002] There are many domestic companies that produce compressor four-way valve bodies, and the solder grades they use are all 34 silver, copper, zinc and tin. Because the brazing filler metal contains tin, the solder joint has a certain degree of brittleness, the shock resistance is not good, and the melting point is relatively high, which makes the use cost of the material relatively high; therefore, there is an urgent need for a solder that can improve the tensile performance of the solder joint. Material, and the production cost of this novel solder can not increase. Contents of the invention

[0003] The purpose of the present invention is to design a 30 silver indium-containing brazing material with relatively convenient processing technology and low cost. [0...

Examples

Embodiment 1

[0014] According to the mass ratio: select the ingredients of electrolytic copper 33%, silver 29%, and zinc 38% to melt, stir and remove slag at 950°C, and adjust the proportion according to the proportion of indium, accounting for 0.7% of the total mass of the solution, and trace elements respectively Choose strontium, which accounts for 0.05% of the total mass of the solution, and cerium, which accounts for 0.08% of the total mass of the solution; the mixture is added to the solution, and the melting temperature is 980°C, then stirred to remove slag, and the solution is cast out of the furnace to form a rod with a diameter of 50mm and a length of 660mm The cast bar is cut off into a small bar with a length of 90mm after removing the outer oxide skin. The cut small bar is preheated at 430°C, and then extruded at a temperature of 440°C in the mold cylinder. The customer requires a wire diameter plus 0.13mm, and the outer mold of the final wire diameter is used to draw it into a...

Embodiment 2

[0016] According to the mass ratio: select the ingredients of electrolytic copper 41%, silver 29%, and zinc 30% to melt and stir at 960°C to remove slag, and then adjust the proportion according to the proportion of indium, accounting for 0.8% of the total mass of the solution, and trace elements respectively Select strontium, which accounts for 0.10% of the total mass of the solution, and cerium, which accounts for 0.10% of the total mass of the solution; add the mixture to the solution, stir and remove the slag when the melting temperature is 970°C, and cast the solution out of the furnace to form a 50mm in diameter and 660mm in length Bar stock, the cast bar stock is cut off into a small bar stock with a length of 100mm after removing the outer scale, preheating the cut bar stock at 430°C, and then extruding it into a mold at a temperature of 440°C. The wire diameter plus 0.20mm is required by the customer, and the outer mold of the final wire diameter is used to draw it int...

Embodiment 3

[0018] According to the mass ratio: select the ingredients of electrolytic copper 35%, silver 31%, zinc 34% to melt, stir and remove slag at 980°C, and adjust the ratio according to the proportion of indium, accounting for 0.95% of the total mass of the solution, and trace elements respectively Select strontium, which accounts for 0.2% of the total mass of the solution, and cerium, which accounts for 0.15% of the total mass of the solution; add the mixture to the solution, stir and remove the slag when the melting temperature is 960°C, and cast the solution out of the furnace to form a 50mm in diameter and 660mm in length Bar stock, the cast bar stock is cut off into a small bar stock with a length of 110mm after removing the outer scale, preheating the cut bar stock at 430°C, and then extruding it into a mold at a temperature of 440°C. The wire diameter plus 0.14mm is required by the customer, and the outer mold of the final wire diameter is used to draw it into coil wire with...