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A brass brazing filler metal and alloy technology, applied in metal processing equipment, welding/cutting media/materials, welding media, etc., can solve the problems of lower strength index, copper annealing, lower reliability of brazing joints, etc., so as to improve reliability performance, low cost
Inactive Publication Date: 2012-07-25
SOUTH CHINA UNIV OF TECH
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Problems solved by technology
Due to the inherent brittleness and microcracks of Fe-Si and Fe-P intermetallic compounds, the reliability of the brazing joint service process (such as: air tightness, electrical conductivity and mechanical properties) will be reduced.
Secondly, due to the high melting point of the existing brass solder, when brazing similar steel / copper joints, the annealing of copper is severe, causing excessive growth of grains, resulting in a decrease in strength indicators
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Embodiment 1
[0027] A brass solder alloy, its alloy formula is Cu: 60%, Sn: 1.5%, Ag: 5%, In: 1.0%, Ge: 0.05%, Zn: balance.
[0028] The preparation steps of above-mentioned brass solder alloy are as follows:
[0029] 1) Prepare a total of 5000 grams of each material according to the above formula;
[0030] 2) Put Cu into an induction furnace and heat it to above 1100°C and melt it;
[0031] 3) Add Zn and stir fully, while rapidly reducing the temperature of the molten metal to 920°C;
[0032] 4) After the molten metal is uniform, add Ag and stir thoroughly;
[0033] 5) Add Sn, In and Ge and stir evenly, then cast;
[0034] 6) The brazing alloy is obtained by extruding and wire drawing according to the conventional brazing filler metal processing method.
Embodiment 2
[0036] The difference between this embodiment and Example 1 is to adopt the following formula:
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Abstract
The invention discloses brass brazing alloy, which comprises Cu, Zn, Sn, Ge, Ag and/or In. The brass brazing alloy consists of components including, by mass percentage, from 58 to 60% of Cu, from 0.5 to 3.0% of Sn, from 1.0 to 6.0% of Ag and/or from 1.0 to 5.0% of In, from 0.05 to 0.3% of Ge and the balance Zn. Compared with an existing brass brazing material, the brass brazing alloy has the advantages that melting temperature is low, the brass brazing alloy can replace a silver brazing material to be used for brazing steel/copper joints, and cost is low due to the fact that Ag content of the brass brazing alloy is low.
Description
technical field [0001] The invention relates to the technical field of brazing, in particular to a high-reliability brass solder alloy for brazing connecting steel. Background technique [0002] At present, in various industrial fields, the solder alloys used for brazing steel mainly include silver solder (Ag-Cu-Zn system), brass solder (Cu-Zn system) and the like. Silver solder has been widely used due to its low melting temperature, excellent wetting properties and good comprehensive mechanical properties. However, with the excessive use of non-renewable resources, the price of precious metal silver continues to rise, resulting in the continuous increase of manufacturing costs for manufacturers. In order to rationally allocate non-renewable resources and reduce manufacturing costs, people have begun to pay attention to the feasibility of applying brass solder in various industrial fields. [0003] For a long time, the traditional brass solder has been based on Cu. First,...
Claims
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