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Lead-free soft braze welding material and preparation method of lead-free soft braze welding material

A technology of soldering and manufacturing method, applied in welding equipment, welding/cutting medium/material, welding medium, etc., can solve the problems of easy peeling of solder joints, high bismuth content, high price, reduce slag production rate, protect Metal surface, simple effect of manufacturing method

Inactive Publication Date: 2012-10-10
高新锡业(惠州)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The melting points of these lead-free solders are relatively low, and the two rare metals contained in them are silver and indium. These two types of Jinshan have few mineral resources, relatively high prices, and high bismuth content, and the solder joints are easy to peel off after soldering.

Method used

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  • Lead-free soft braze welding material and preparation method of lead-free soft braze welding material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Add 90kg of refined tin into a graphite crucible for melting, heat up to 1100°C after melting, add 10kg of refined copper, stir evenly with a wooden stirring rod and melt into a liquid tin-copper alloy, then pour it into a mold and cast it into a tin-copper alloy after standing for 30 minutes Ingot removal;

[0031] Then put 50kg of refined tin into the graphite crucible for melting, heat up to 600°C-1000°C after melting, add 50kg of pure antimony, wait for the antimony to melt and stir evenly, pour it into a mold and cast it into a tin-antimony alloy ingot after standing for 30 minutes and take it out;

[0032] Then put 57kg of refined tin into the graphite crucible for melting, heat up to about 1600°C after melting, put in 3kg of pure nickel, wait for the nickel to melt and stir evenly, pour it into a mold and cast it into a tin-nickel alloy ingot after standing for 30 minutes and take it out;

[0033] Three kinds of alloy ingots prepared above, active carbo...

Embodiment 2

[0035] Get three kinds of alloy ingots prepared in Example 1, activated carbon and tin to be formulated by weight percentage: antimony: 4.8%, copper: 0.1%, nickel: 3.0%, activated carbon: 0.5% and the balance are tin lead-free solder .

Embodiment 3

[0037] Get three kinds of alloy ingots prepared in Example 1, activated carbon and tin to be formulated by weight percentage: antimony: 6.0%, copper: 2.5%, nickel: 1.5%, activated carbon: 0.3% and the balance are the lead-free solder of tin .

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Abstract

The invention relates to a lead-free soft braze welding material and a preparation method of the lead-free soft braze welding material. The lead-free soft braze welding material adopts Sn (stannum) as substrates and also comprises the following ingredients in percentage by weight: 0.1 percent to 2.5 percent of Cu (copper), 4.1 percent to 6.0 percent of Sb (stibonium), 0.005 percent to 3.0 percent of Ni (nickel), 0.01 percent to 3.0 percent of active carbon and / or 0.01 percent to 3.0 percent of ZnCl2 (zinc chloride), and in addition, a certain amount of NaOH (sodium hydroxide) and NH4Cl (ammonia chloride) can be selectively added, wherein gas including trace O2 (oxygen gas), SO2 (sulfur dioxide), CO2 (carbon dioxide) and the like inside metal can be removed through the addition of active carbon and ZnCl2, so the surface of the metal is protected, the product oxidation is reduced, and the slag yield is reduced. The welding material provided by the invention has the advantages that on the basis of ensuring good welding performance of welding material alloy, the production cost of enterprises is greatly reduced, good economic benefits are realized, in addition, a manufacture method of the welding material alloy is simple, and the industrial implementation is easy.

Description

technical field [0001] The invention relates to the technical field of solder and its manufacture, in particular to a lead-free solder and a preparation method thereof. Background technique [0002] In industry, brazing refers to a welding technique that uses solder with a lower melting temperature than the base metal, and the operating temperature is lower than the solid phase of the base metal and higher than the liquidus of the solder. According to the temperature of the solder liquidus, brazing is divided into two types: soft soldering and hard brazing. Soft soldering is a low-temperature bonding process. Compared with brazing, it has the following characteristics: (1) It can be welded with common heat sources such as soldering irons and blowtorches, and the operation is easy; (2) The heating temperature is low, and the structure and properties of the base metal change Small size, copper and aluminum components can be welded in any way, and the possible expansion, stren...

Claims

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Application Information

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IPC IPC(8): B23K35/26B23K35/363B23K35/40
Inventor 苏传港郭黎苏燕旋苏传猛曹正
Owner 高新锡业(惠州)有限公司
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