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A kind of method for preparing silver-copper-zinc-tin solder strip

A solder strip, silver-copper-zinc technology, used in metal rolling, metal extrusion dies, etc., can solve the problem of irreplaceable strips, high cost of silver-copper-zinc-tin solder strips, and poor intergranular plastic coordination deformation ability, etc. problems, to avoid cracking at the edge of the plate, reduce the number of material removals, and refine the microstructure.

Active Publication Date: 2022-05-27
西安诺博尔稀贵金属材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, silver-copper-zinc-tin solder products are mainly wire materials, and the demand for strip materials is relatively small, but the application of strip materials in the equipment manufacturing process cannot be replaced, so its product orders have the characteristics of small batches and multiple batches
At present, there are two methods for preparing copper-zinc-tin brazing material. One method is "casting→hot rolling→cold rolling". The reaction generates brittle intermetallic compounds, which significantly reduces the plasticity of the solder. In addition, due to the coarse as-cast structure of the solder and poor intergranular plastic coordination and deformation ability, the ingot is easy to crack during direct hot rolling, and the product yield is low.
Another method is "casting → hot extrusion → hot rolling → cold rolling". After the ingot is deformed by hot extrusion, its structure can be significantly refined, and the brittle intermetallic compound will be broken, which is conducive to improving the plasticity of the solder. It is convenient for subsequent processing and deformation, so the brazing material prepared by this method has a uniform structure and a high yield, but the method includes a hot extrusion process, and the cost is high, and the cost of preparing silver-copper-zinc-tin solder strips in small batches is relatively high

Method used

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  • A kind of method for preparing silver-copper-zinc-tin solder strip
  • A kind of method for preparing silver-copper-zinc-tin solder strip
  • A kind of method for preparing silver-copper-zinc-tin solder strip

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] A method for preparing a silver-copper-zinc-tin brazing material strip of the present embodiment comprises the following steps:

[0049] Step 1: Place pure metal Ag, pure metal Cu, pure metal Sn and pure metal Zn in the crucible of the vacuum induction furnace according to the raw material ratio of the grade of Ag55CuZnSn solder, seal the furnace, evacuate, and turn on the intermediate frequency power supply for intermediate frequency induction. Smelting to obtain molten metal, placing the molten metal in a casting mold for casting, using a sawing machine to cut the riser, and using a lathe to clean the surface to obtain a plate-shaped ingot with a size of 20mm×100mm×200mm;

[0050] Step 2, placing the plate-shaped ingot in step 1 in a resistance furnace for homogenization treatment to obtain a plate-shaped ingot after homogenization treatment; the temperature of the homogenization treatment is 500 ° C, and the holding time of the homogenization treatment is 5h; the hom...

Embodiment 2

[0058] This example is the same as Example 1, and the difference is that the first step is: placing pure metal Ag, pure metal Cu and pure metal Sn in the crucible of the vacuum induction furnace in sequence according to the ratio of raw materials, and placing pure metal Zn in the crucible of the vacuum induction furnace. In the hopper, seal the furnace, evacuate, turn on the intermediate frequency power supply to conduct intermediate frequency induction melting of the metal in the crucible, after it is completely melted and fully stirred and mixed, a melt is obtained, and then the pure metal Zn in the hopper is slowly poured into the melt to continue. Smelting for 10 min to obtain molten metal, cast the molten metal in a mold, cut the riser with a saw, and clean the surface with a lathe to obtain a plate-shaped ingot with a size of 20mm×100mm×200mm. The method of first melting and mixing metal Ag, Cu and Sn, and then adding metal Zn to continue melting can reduce the volatiliza...

Embodiment 3

[0060] This embodiment provides an equal channel extrusion die for preparing silver-copper-zinc-tin solder strips, such as Figures 1 to 6 As shown, it includes a mold body, and an extrusion channel is arranged in the mold body, and the channel included angle of the extrusion channel is 120°;

[0061] The extrusion channel includes an upper extrusion channel 1, a lower extrusion channel 3 and a corner channel 2 arranged between the upper extrusion channel 1 and the lower extrusion channel 3. One end of the corner channel 2 is connected to the upper extrusion channel 1. Communication, the other end of the corner channel 2 communicates with the lower extrusion channel 3 .

[0062] The upper extrusion channel, the corner channel and the lower extrusion channel are connected in sequence to form the extrusion channel; these channel extrusion dies are used for the equal channel extrusion of the raw material ingot, and the ingot has a fine internal structure after shear deformation. ...

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Abstract

The invention discloses a method for preparing silver-copper-zinc-tin solder strips, which comprises the following steps: step 1, melting metal Ag, metal Cu, metal Sn and metal Zn to obtain plate-shaped ingots; step 2, uniformly The plate-shaped ingot described in step 1 is chemically treated to obtain a plate-shaped ingot after homogenization treatment; step 3, lubricating the extrusion channel of the equal-channel extrusion die, preheating the lubricated equal-channel extrusion die to obtain the preheated Back equal channel extrusion die; Step 4, placing the flat ingot after the homogenization treatment described in step 2 in the equal channel extrusion mold after preheating in step 3 to carry out equal channel extrusion deformation treatment to obtain the extruded slab Step 5, the extruded slab described in step 4 is sequentially subjected to hot rolling and cold rolling to obtain the finished product. The invention adopts an equal-channel extrusion die for extrusion processing, which can reduce the production cost of producing silver-copper-zinc-tin solder strips in small batches and multi-batches.

Description

technical field [0001] The invention belongs to the technical field of plastic processing of welding materials, and particularly relates to a method for preparing a silver-copper-zinc-tin brazing material strip. Background technique [0002] Solder is a kind of filler added in or beside the gap in order to realize the combination of two materials or parts. Among them, the silver copper zinc tin solder has a moderate melting point, excellent welding performance, good strength, plasticity, It has electrical conductivity, thermal conductivity and corrosion resistance, so it is widely used to connect most ferrous and non-ferrous metals except magnesium and aluminum. It can replace silver copper zinc cadmium solder to a large extent. Brazing filler metal. [0003] At present, silver-copper-zinc-tin solder products are mainly wire, and the demand for strip is relatively small, but the application of strip in the equipment manufacturing process cannot be replaced, so its product o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21C23/06B21C23/32B21C25/02B21B1/22C22C1/02C22F1/00C22F1/14
CPCB21C23/06B21C23/32B21C25/02B21B1/22C22C1/02C22F1/00C22F1/14B21B2001/221B21B2001/225
Inventor 朱绍珍邢健赵涛丁锋马小龙马晓东王飞
Owner 西安诺博尔稀贵金属材料股份有限公司
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