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Zinc-based soft solder suitable for hot-drip galvanizing repair

A hot-dip galvanizing and soldering technology, used in welding/cutting media/materials, welding media, welding equipment, etc., can solve the problems affecting the spreadability and wettability of solder, easy oxidation, etc., and achieve good oxidation resistance. performance, increase the wetting force, and improve the effect of mechanical properties

Active Publication Date: 2015-03-25
STATE GRID CORP OF CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, Zn-Sn alloy is easily oxidized at high temperature, which affects the spreadability and wettability of solder.

Method used

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  • Zinc-based soft solder suitable for hot-drip galvanizing repair
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  • Zinc-based soft solder suitable for hot-drip galvanizing repair

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Zn-Sn-1Al-RE solder

[0028] A zinc-based soldering material suitable for hot-dip galvanizing repair, the parts by weight of each chemical raw material in the solder alloy are as follows: 50 parts of zinc, 1 part of aluminum, 0.1 part of rare earth, 49 parts of tin, and the rare earth is a mixture of Ce and La rare earth.

[0029] Preparation:

[0030] Weigh 50 parts of pure zinc blocks and add them into a crucible resistance furnace, heat to 450°C, and keep warm for 10 minutes to ensure complete melting. Maintain the temperature of the zinc liquid, then weigh 49 parts of pure tin block and add it, and then keep it warm for 10 minutes, stirring evenly during this period, so as to accelerate the melting of the tin block to make a mixed solution; weigh the aluminum rare earth master alloy, and the rare earth content in the aluminum rare earth master alloy 10%, after adding to the crucible, raise the temperature to 570°C, keep it warm for 10 minutes to ensure that the ...

Embodiment 2

[0032] Zn-Sn-0.5Al-RE solder

[0033] A kind of zinc-based soft soldering material suitable for hot-dip galvanizing repair, the parts by weight of each chemical raw material in the solder alloy are as follows: 55 parts of zinc, 0.5 part of aluminum, 0.15 part of rare earth, 40 parts of tin, and the rare earth is Ce, La, Pr, Nd mixed rare earth.

[0034] Preparation:

[0035] Weigh 55 parts of pure zinc blocks and add them into a crucible resistance furnace, heat to 460°C, and keep warm for 8 minutes to ensure complete melting. Keep the temperature of the zinc liquid, then weigh 40 parts of pure tin block and add it, and then keep it warm for 8 minutes. ℃, keep warm for 12 minutes to ensure that the intermediate alloy is completely melted, and stir evenly during this period. After cooling down to 450°C, fully stir again, and cast it into a mold prepared in advance to obtain a zinc-based solder suitable for hot-dip galvanizing repair.

Embodiment 3

[0037] Zn-Sn-1.5Al-RE solder

[0038] A kind of zinc-based soldering material suitable for hot-dip galvanizing repair, the parts by weight of each chemical raw material in the solder alloy are as follows: 58 parts of zinc, 1.5 parts of aluminum, 0.3 part of rare earth, 42 parts of tin, and the rare earth is Ce, La, Pr mixed rare earths.

[0039] Preparation:

[0040] Weigh 58 parts of pure zinc blocks and add them into a crucible resistance furnace, heat to 480°C, and keep warm for 10 minutes to ensure complete melting. Maintain the temperature of the zinc liquid, then weigh 42 parts of pure tin block and add it, and then keep it warm for 10 minutes, stirring evenly during the period to accelerate the melting of the molten tin block to obtain a mixed solution; weigh the aluminum rare earth master alloy, and the rare earth content in the aluminum rare earth master alloy 15%, after adding to the crucible, heat up to 600°C, keep warm for 10 minutes to ensure that the intermed...

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Abstract

The invention relates to a zinc-based soft solder suitable for hot-drip galvanizing repair. Solder alloy comprises, by weight, 50-60 parts of zinc, 0.5-1.5 parts of aluminum, 0.1-0.5 part of rare earth and 38-49 parts of tin. The rare earth is misch metal. After the aluminum and the rare earth are added to the solder, the solder has good oxidation resistance and wetting property, and repair of galvanized steel can be well achieved. The zinc-based soft solder has oxidation resistance and high corrosion resistance, the comprehensive performance of the alloy can be effectively changed by adding the rare earth, a trace of active rare earth can be easily gathered on the interface and the surface of the alloy solder in a liquid state, so that the surface of the alloy is remarkably lowered, the rare earth cooperates with the aluminum to improve the wetting property with the surface of a repair layer (steel), the mechanical property of the solder is improved, and the malleability and the shear strength of the solder are improved.

Description

technical field [0001] The invention relates to a solder, in particular to a zinc-based soft solder suitable for repairing by hot-dip galvanizing. Background technique [0002] Zinc has become the most commonly used protective coating for steel components due to its good corrosion resistance in the atmosphere and its cathodic protection effect on steel. With its simple process and low price, hot-dip galvanizing technology has become an anti-corrosion method for steel structures and is widely used in various fields of national economy and people's livelihood. [0003] Missing plating may occur during the dipping process of hot-dip galvanized components, and bumps may also occur during transportation and installation, resulting in the peeling off of the galvanized layer. According to GB / T 13912-2002 "Technical Requirements and Test Methods for Hot-dip Galvanized Coatings of Iron and Steel Parts with Metal Coverings", thermal spraying of zinc, coating of zinc-rich paint and fu...

Claims

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Application Information

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IPC IPC(8): B23K35/28B23K35/40
CPCB23K35/282B23K35/40
Inventor 樊志彬刘爽李辛庚岳增武王晓明王学刚闫风洁郭凯曹建梅
Owner STATE GRID CORP OF CHINA
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