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Zn-Mg magnesium alloy solder

A technology of magnesium alloy and brazing material, which is applied in the direction of welding/cutting medium/material, welding medium, welding equipment, etc., can solve the problems of high cost of brazing filler metal, increase the cost of brazing filler metal, etc., and achieve avoidance of oxidation and over-burning, and good spreading Sexual and gap-filling effects

Inactive Publication Date: 2010-02-24
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A magnesium alloy solder In-Mg-Zn-Al newly developed by Japan (the melting temperature range of the solder is 449-490°C) contains a large amount of precious metal In (indium), of which the mass percentage of In accounts for about 65%. , which significantly increases the cost of brazing material [T.Watanabe, S.Komatsu, K.Oohara.Development of flux and filler metal for brazingmagnesium alloy AZ31B[J].Welding Journal, 2005, 84(3): 37-40.]
In addition, the mass percentage of In in the magnesium alloy solder Mg-Sn-In-Al newly developed by Japan (the melting temperature range of the solder is 457-500°C) accounts for about 20%, and the cost of the solder is also relatively high.

Method used

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  • Zn-Mg magnesium alloy solder

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] The chemical composition and mass percentage of the solder are: Mg: 4.0%, and the balance is Zn. The solder alloy is smelted by the flux protection method, poured into ingots, and then the solder is divided into strips and blocks by mechanical division. Before brazing, the AZ31B magnesium alloy sample was sanded and cleaned with acetone to remove surface dirt. The solder was placed at the joint, and the flux was evenly spread on the joint and the solder. The joint was fixed by a clamp and placed in an argon protection device for High frequency induction brazing. During the brazing process, the argon flow rate was 0.3L / min, the heating rate was 300°C / min, and the brazing temperature range was 420-450°C. After holding for 120s, cool to room temperature. After brazing, the appearance of the joint was well formed, and the shear strength and tensile strength of the brazed joint were measured, and the results are shown in Table 1.

Embodiment 2

[0014] The chemical composition and mass percentage of the solder are: Mg: 6.0%, and the balance is Zn. The solder alloy is smelted by the flux protection method, poured into ingots, and then the solder is divided into strips and blocks by mechanical division. Before brazing, the AZ31B magnesium alloy sample was sanded and cleaned with acetone to remove surface dirt. The solder was placed at the joint, and the flux was evenly spread on the joint and the solder. The joint was fixed by a clamp and placed in an argon protection device for High frequency induction brazing. During the brazing process, the argon gas flow rate was 0.3L / min, the heating rate was 300°C / min, and the brazing temperature range was 420-450°C. After holding for 120s, cool to room temperature. After brazing, the appearance of the joint was well formed, and the shear strength and tensile strength of the brazed joint were measured, and the results are shown in Table 1.

Embodiment 3

[0016] The chemical composition and mass percentage of the solder are: Mg: 8.0%, and the balance is Zn. The solder alloy is smelted by the flux protection method, poured into ingots, and then the solder is divided into strips and blocks by mechanical division. Before brazing, the AZ31B magnesium alloy sample was sanded and cleaned with acetone to remove surface dirt. The solder was placed at the joint, and the flux was evenly spread on the joint and the solder. The joint was fixed by a clamp and placed in an argon protection device for High frequency induction brazing. During the brazing process, the argon gas flow rate was 0.3L / min, the heating rate was 300°C / min, and the brazing temperature range was 420-450°C. After holding for 120s, cool to room temperature. After brazing, the appearance of the joint was well formed, and the shear strength and tensile strength of the brazed joint were measured, and the results are shown in Table 1.

[0017]

[0018] Chemical compositi...

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Abstract

The invention provides a Zn-Mg magnesium alloy solder, belonging to the technical field of magnesium alloy welded joint. The components of the provided Zn-Mg magnesium alloy solder contain 4% to 8% ofMg and the remains are Zn. The melt temperature of the Zn-Mg magnesium alloy solder is ranged from 365 DEG C to 396 DEG C and the soldering temperature is ranged from 420 DEG C to 450 DEG C. The solder can be applied to the magnesium alloy solder with solidus temperature above 450 DEG C. The AZ31B magnesium can be soldered in the manner of high frequency induction welding. The slip resistance ofthe solder overlap joint is ranged from 38MPa to 43 MPa and the tensile strength of the butt joint is ranged from 52MPa to 53MPa.

Description

technical field [0001] The invention relates to a Zn-Mg magnesium alloy brazing filler metal, which belongs to the technical field of magnesium alloy welding connection. Background technique [0002] Magnesium and its alloys are currently the lightest metal structural materials, with low density, high specific strength, good vibration damping, good electromagnetic shielding, good electrical and thermal conductivity, good processability, good thermoformability, easy It is favored for its advantages such as recycling. It has extremely important application value and broad application prospects in the fields of automobile, electronics, electrical appliances, transportation, aerospace, aviation and national defense military industry. However, there are very few types of magnesium alloy solders that have been commercially used at present, such as the BMg-1 (American Society for Testing Materials brand AZ92A) and BMg-2a (American Society for Testing Materials brand AZ125A) brazin...

Claims

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Application Information

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IPC IPC(8): B23K35/28B23K1/002B23K1/20
Inventor 蒋建敏李晓延马力贺定勇崔丽王智慧周正班书英
Owner BEIJING UNIV OF TECH
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