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A kind of sn-zn-ag-ni alloy lead-free solder and preparation method thereof

A lead-free solder and alloy technology, applied in metal processing equipment, manufacturing tools, welding equipment, etc., can solve problems such as poor corrosion resistance of joints, and achieve mass production, good wettability, and good brazing process Effect

Active Publication Date: 2017-04-05
BEIJING INST OF NONFERROUS METALS & RARE EARTH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But its disadvantage is that the corrosion resistance of the joint is poor. According to some data, the joint of Sn-Zn brazing aluminum is soaked in tap water, and it will be corroded and disconnected after 3 to 4 weeks at room temperature.

Method used

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  • A kind of sn-zn-ag-ni alloy lead-free solder and preparation method thereof
  • A kind of sn-zn-ag-ni alloy lead-free solder and preparation method thereof
  • A kind of sn-zn-ag-ni alloy lead-free solder and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Embodiment 1: Sn-Zn-Ag-Ni alloy solder (Zn8.0wt%, Ag0.7wt%, Ni1.2wt%, Sn surplus)

[0033] Preparation steps such as figure 1 shown.

[0034] Step 1: Weighing the metal raw material

[0035] By weight percentage, take 80 grams of Zn, 7 grams of Ag, 12 grams of Ni and 901 grams of Sn respectively;

[0036] Step 2: Master alloy melting and casting

[0037] Then weigh 120 grams of Sn, place 12 grams of Ni metal raw materials in a graphite crucible, use an intermediate frequency induction furnace, heat to 600 ° C for melting, and cast to form a SnNi master alloy;

[0038] Step 3: Alloy Casting

[0039] Using an intermediate frequency induction furnace, melt and cast the remaining Sn, Zn, Ag metal raw materials and SnNi master alloy at 250°C to 300°C to make a rod-shaped Sn-Zn-Ag-Ni alloy ingot with a diameter of 30mm;

[0040] Step 4: Wire Preparation

[0041] The casted alloy rod-shaped ingot is extruded by an extruder to make a welding wire with a diameter of 1 mm. ...

Embodiment 2

[0042] Embodiment 2: Sn-Zn-Ag-Ni alloy solder (Zn8.5wt%, Ag0.8wt%, Ni1.1wt%, Sn surplus)

[0043] Step 1: Weighing the metal raw material

[0044] By weight percentage, take 85 grams of Zn, 8 grams of Ag, 11 grams of Ni and 896 grams of Sn respectively;

[0045] Step 2: Master alloy melting and casting

[0046] Then weigh 110 grams of Sn, place 11 grams of Ni metal raw materials in a graphite crucible, use an intermediate frequency induction furnace, heat to 600 ° C for melting, and cast to form a SnNi master alloy;

[0047] Step 3: Alloy Casting

[0048] Using an intermediate frequency induction furnace, melt and cast the remaining Sn, Zn, Ag metal raw materials and SnNi master alloy at 250°C to 300°C to make a plate-shaped Sn-Zn-Ag-Ni alloy ingot with a thickness of 5mm;

[0049] Step 4: Solder Foil Preparation

[0050] The alloy plate-shaped ingot after melting and casting is rolled by a rolling mill to make a welding foil with a thickness of 0.1mm.

Embodiment 3

[0051] Embodiment 3: Sn-Zn-Ag-Ni alloy solder (Zn9.0wt%, Ag1.0wt%, Ni1.0wt%, Sn surplus)

[0052] Step 1: Weighing the metal raw material

[0053] By weight percentage, take 90 grams of Zn, 10 grams of Ag, 10 grams of Ni and 890 grams of Sn respectively;

[0054] Step 2: Master alloy melting and casting

[0055] Then weigh 100 grams of Sn, place 10 grams of Ni metal raw materials in a graphite crucible, use an intermediate frequency induction furnace, heat to 600 ° C for melting, and cast to form a SnNi master alloy;

[0056] Step 3: Alloy Casting

[0057] Using an intermediate frequency induction furnace, melt and cast the remaining Sn, Zn, Ag metal raw materials and SnNi master alloy at 250°C to 300°C to make a rod-shaped Sn-Zn-Ag-Ni alloy ingot with a diameter of 30mm;

[0058] Step 4: Solder Powder Preparation

[0059] Using the gas atomization powder making method, using nitrogen as the atomizing gas, place the rod-shaped alloy ingot prepared in step 3 under the conditi...

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Abstract

Disclosed are a Sn-Zn-Ag-Ni alloy lead-free solder and a preparation method thereof. The Sn-Zn-Ag-Ni alloy lead-free solder is mainly applied to low-temperature soldering of pure aluminum and aluminum alloy. The Sn-Zn-Ag-Ni alloy lead-free solder is composed of, by weight percentage, 8.0-10.0% of Zn, 0.5-1.5% of Ag, 0.5-1.2% of Ni and Sn as balance. The Sn-Zn-Ag-Ni alloy lead-free solder is low in melting temperature, good in soldering technological property and high in lubricity, achieves a welding deposition rate higher than 75% and a welding line tensile strength sigma b higher than or equal to 50 MPa, and is applicable to low-temperature soldering of the pure aluminum and various aluminum alloys such as 3A21, 6063 and 6061.

Description

technical field [0001] The invention relates to a low-temperature brazing filler metal for aluminum and aluminum alloy, in particular to a Sn-Zn-Ag-Ni alloy brazing filler metal. Background technique [0002] Pure aluminum and aluminum alloys are widely used in the fields of aerospace, aviation, construction, electrical appliances, automobiles and ships. The connection and preparation process of pure aluminum and aluminum alloys play a very important role in product manufacturing. There are many ways to connect aluminum alloys, and low-temperature brazing is a very important one. Especially for some electronic components or devices, the implementation of low-temperature brazing can not only meet the connection requirements, but also fully guarantee the performance of the devices. [0003] Low-temperature solder is a metal connection material used in low-temperature brazing. In order to obtain high-quality brazed joints, usually low-temperature solder should meet the followi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/26B23K35/40
CPCB23K35/0244B23K35/262B23K35/40
Inventor 张国清李刚杜旭明赵伟
Owner BEIJING INST OF NONFERROUS METALS & RARE EARTH
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