Al-Si-Cu-Zn-Sn-Ni aluminum-based brazing filler metal and preparation method thereof

An al-si-cu-zn-sn-ni, aluminum-based technology, applied in the field of Al-Si-Cu-Zn-Sn-Ni aluminum-based solder and its preparation, to improve wettability and spreadability, reduce Brittleness, the effect of increasing ductility and toughness

Inactive Publication Date: 2012-01-18
GUILIN QINGTONG NON FERROUS METAL ARTS & CRAFTS MATERIAL DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims at the technical problems existing in the existing brazing technology, and provides an Al-Si-Cu-Zn-Sn-Ni aluminum-based solder and its preparation method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] 1. The composition of Al-Si-Cu-Zn-Sn-Ni aluminum-based solder:

[0037] In terms of mass percentage, the composition of the aluminum-based solder in the present invention is Si: 11%, Cu: 10%, Zn: 9%, Sn: 5%, Ni: 3%, Ce: 0.2%, Sr: 0.05 %, Zr: 0.08%, Al balance. Alloy degree 38.33%.

[0038] 2. Preparation method:

[0039] 1) Weighing: Weigh each component according to the composition of the fiber material, among which Al is added in the form of pure metal, and the elements Si, Cu, Zn, Sn, Ni, Ce, Sr, and Zr are respectively added in the form of Al-30Si, Al-50Cu, Al - 50%Zn, Al-30%Sn, Al-10Ni, and Al-20Ce, Al-10Sr, Al-5Zr master alloys are added.

[0040] 2) Melting: put pure aluminum into graphite crucible melting furnace, add aluminum flux (mixed dry powder of KCl and NaCl, wherein KCl:NaCl=1:1, the amount added is 1% of the total weight of pure aluminum) to cover, and heat to 800 After melting at ℃, remove slag, then add Al-Si, Al-Cu and Al-Ni master alloys in prop...

Embodiment 2

[0045] 1. The composition of aluminum-based solder:

[0046] The difference between this example and Example 1 is that the mass percentage components of aluminum-based solder are Si: 11%, Cu: 10%, Zn: 10%, Sn: 4%, Ni: 2.5%, Ce: 0.15% , Sr: 0.06%, Zr: 0.1%, Al balance. The alloy degree is 37.81%.

[0047] Two: Preparation method:

[0048] The difference between this example and Example 1 is that the first refining is refining at 800°C for 10 minutes, and the second refining is refining at 780°C for 6 minutes and standing for 6 minutes.

[0049] The above-mentioned aluminum-base brazing filler metal wire that makes above is carried out experimental detection, obtains each performance index as:

[0050] The liquidus temperature is 518.3°C, the solidus temperature is 482.6°C; the tensile strength of the solder itself is σ b =126MP; when the base metal is 7003 and the flux is QJ202, the brazing temperature is 530-560°C, the shear strength of the weld is 133Mpa, and the impact tou...

Embodiment 3

[0052] 1. The composition of aluminum-based solder:

[0053] The difference between this example and Example 1 is that the mass percentage components of aluminum-based solder are Si: 10%, Cu: 10%, Zn: 8%, Sn: 3%, Ni: 2%, Ce: 0.1% , Sr: 0.05%, Zr: 0.07%, Al balance. The alloy degree is 33.22%.

[0054] Two: Preparation method:

[0055] The difference between this example and Example 1 is that the first refining is refining at 760° C. for 15 minutes, and the second refining is refining at 750° C. for 5 minutes and standing for 5 minutes.

[0056] The above-mentioned aluminum-based brazing filler metal wire that is made is carried out experimental detection, and the various performance indicators that obtain are:

[0057] The liquidus temperature is 521.8°C, the solidus temperature is 486.2°C; the tensile strength of the solder itself is σ b =120MPa; when the base metal is 7003 and the flux is QJ202, the brazing temperature is 530-560°C, the shear strength of the weld is 135M...

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Abstract

The invention relates to an Al-Si-Cu-Zn-Sn-Ni aluminum-based brazing filler metal and a preparation method thereof. The components of the aluminum-based brazing filler metal are 7 to 13 percent by weight of Si, 5 to 11 percent by weight of Cu, 4 to 11 percent by weight of Zn, 1 to 6 percent by weight of Sn, 1 to 3 percent by weight of Ni, 0.02 to 0.3 percent by weight of Ce, 0.01 to 0.1 percent by weight of Sr, 0.01 to 0.2 percent by weight of Zr and the balance of Al. The process flow for preparing the aluminum-based brazing filler metal is that: pure aluminum is added into a graphite crucible and covered by flux for aluminum under the condition of 800 DEG C to 900 DEG C, and slag is removed after melting; the aluminum-based intermediate alloy of high-melting point elements and flux for aluminum are added at the same time, and melting, stirring and slag removal are carried out; the aluminum-based intermediate alloy of low-melting point elements is added under the protection of nitrogen, and melting and stirring are carried out; the mixture of argon and hexachloroethane is added to carry out refining, and standing and slag removal are carried out; the intermediate alloy of trace elements is added, and melting and stirring are carried out; secondary refining and slag removal are carried out; and under the protection of nitrogen, casting formation is carried out. The Al-Si-Cu-Zn-Sn-Ni aluminum-based brazing filler metal has the advantages of low melting point, high strength, high toughness, high corrosion-resistant property and good wetting property and spreadability.

Description

technical field [0001] The invention belongs to the field of solder, and in particular relates to an Al-Si-Cu-Zn-Sn-Ni aluminum-based solder and a preparation method thereof. Background technique [0002] Since the beginning of the 21st century, with the development of low-carbon economy, the trend of lightening public transportation and replacing steel with aluminum is very obvious. Automobiles, subway vehicles, railway passenger cars, high-speed passenger car bodies, chassis structural materials, doors and windows, shelves, automotive engine parts, air conditioners, radiators, body panels, wheels, etc. are all made of aluminum. On average, each car needs more than 100 kilograms of aluminum processed products, and all-aluminum cars are developing rapidly. The high-strength aluminum alloy structural parts of high-speed rail vehicles (high-speed trains) account for 70% of the total vehicle materials. Aluminum alloys used in civil aviation aircraft Structural parts account fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/28B23K35/40C22C1/03
Inventor 阳家盛
Owner GUILIN QINGTONG NON FERROUS METAL ARTS & CRAFTS MATERIAL DEV CO LTD
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