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Green high-strength and low-temperature composite brazing filler material and preparation method thereof

A composite solder, high-strength technology, used in manufacturing tools, welding equipment, metal processing equipment, etc., can solve the problems of toxic oxides, environmental pollution, and volatile

Active Publication Date: 2017-01-04
ZHENGZHOU RES INST OF MECHANICAL ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Patent CN 101642857 B invented "a kind of cadmium-silver high-strength low-temperature solder". The silver solder containing cadmium is the solder with the best manufacturability among all silver solders, and the solder with ideal strength and processability, but cadmium is a toxic element. , highly volatile, cadmium vapor is a toxic gas, and its oxides are also toxic. The extensive use of cadmium-containing solder not only endangers the health of welding operators, but also affects the surrounding environment. Its production and use of environmental pollution has become a global sexual problems

Method used

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  • Green high-strength and low-temperature composite brazing filler material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Example 1: An electrode was prepared by using the following raw materials in weight percentage, wherein: Zn80%, Al10%, Cu0.5%, Li0.5%, In8.48%, Ti0.5%, B0.02%.

[0022] In the first step, the metal Al is prepared into Al wire with a diameter of 0.4 mm through smelting, extrusion, drawing and other processes for use;

[0023] In the second step, the elements B and Ti with higher melting points are prepared into master alloys A and B respectively with Zn. The master alloy A is composed of B5:Zn95 by weight ratio, and the master alloy B is composed of Ti5:Zn95 by weight ratio. Composition: Put the remaining zinc after the preparation of master alloys A and B into an intermediate frequency furnace to melt, add a thin Cu sheet after the temperature reaches 500-600°C, and add the master alloys A and B after fully fused; use cesium fluoroaluminate and Potassium fluoroaluminate compound salt covering, wherein the weight ratio of cesium fluoroaluminate to potassium fluoroalumina...

Embodiment 2

[0029] Embodiment 2: The following raw materials are used to prepare welding rods, wherein: Zn90%, Al1%, Cu5%, Li0.5%, In3%, Ti0.3%, B0.2%.

[0030] In the first step, the metal Al is prepared into Al wire with a diameter of 0.12 mm through smelting, extrusion, drawing and other processes for use;

[0031] The second step to the fifth step are the same as in Embodiment 1.

[0032] Use this electrode to weld H62 brass, the welding temperature is 437°C, and the welding tensile strength is 123N / mm 2 , shear strength 52N / mm 2 , The weld body is not deformed after welding.

Embodiment 3

[0033] Example 3: The following raw materials are used to prepare welding rods, wherein: Zn81.9%, Al3%, Cu3%, Li1%, In10%, Ti1%, B0.1.

[0034] In the first step, the metal Al is prepared into a diameter of 0.2mm Al wire through processes such as smelting, extrusion, and drawing;

[0035] The second step to the fifth step are the same as in Embodiment 1.

[0036] Use this electrode to weld H62 brass, the welding temperature is 430°C, and the welding tensile strength is 133N / mm 2 , shear strength 61N / mm 2 , The weld body is not deformed after welding.

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Abstract

The invention relates to a green high-strength and low-temperature composite brazing filler material and a preparation method thereof. The green high-strength and low-temperature composite brazing filler material is prepared from 80-90% of Zn, 1-10% of Al, 0.5-5% of Cu, 0.5-1% of Li, 3-10% of In, 0.3-1% of Ti and 0.02-0.2% of B. The preparation method comprises the following steps: preparing metal Al into an Al wire for standby; respectively preparing intermediate alloys A and B from elements B and Ti having relatively high melting points together with Zn, wherein the intermediate alloy A is composed of B and Zn at weight ratio of 5:95, and the intermediate alloy B is composed of Ti and Zn at weight ratio of 5:95; melting the residual Zn, adding thin Cu pieces, and adding the intermediate alloys A and B after fusion; covering with a compound salt of cesium fluoroaluminate and potassium fluoroaluminate; cooling molten metal to 450-480 DEG C, adding metals In and Li, standing for 30-60 min after fusion, casting into ingot C having diameter of 60 mm; extruding and rolling the ingot C into a thin strip having thickness of 0.2 mm; preparing the 0.2 mm thin strip and aluminum wire into a finished electrode having required diameter through a composite electrode unit.

Description

technical field [0001] The invention relates to a green high-strength low-temperature brazing filler metal which can be made into welding rods and is used for brazing feed horns requiring high precision and a preparation method thereof. Background technique [0002] High-frequency components generally require high dimensional accuracy, high shape and position tolerances, and high roughness, and such high-precision components are generally finished through multiple processes. Due to welding and other reasons, some parts have some defects when the finishing is about to be completed, and these defects are not allowed to appear, so they can only be scrapped. [0003] The feed horn is the core component of the radar product, and its processing quality and processing accuracy directly affect the various telecommunication indicators of the radar product. Copper material feed speakers generally need to be brazed with silver, and the surface treatment is as follows: apply 9205 prote...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/28B23K35/40
CPCB23K35/282B23K35/40
Inventor 龙伟民张冠星钟素娟朱坤马佳程亚芳孙华为张青科沈元勋张强
Owner ZHENGZHOU RES INST OF MECHANICAL ENG CO LTD
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