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Active heat-resistant copper-based solder for aluminum bronze/stainless steel brazing and preparation method thereof

A stainless steel and aluminum bronze technology, applied in welding equipment, welding/welding/cutting items, welding/cutting media/materials, etc., can solve the problem that aluminum bronze/stainless steel brazing is not suitable, the surface wettability of aluminum bronze is poor, cannot meet the Thermal strength requirements and other issues, to avoid adverse effects, low silver content, and improve the performance of the brazing process

Active Publication Date: 2018-08-31
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ag-based solder is generally eutectic solder, which has a low melting point and good fluidity, and can form joints with high room temperature strength. However, Ag-based solder has poor heat resistance, and brazed joints can only be used in environments below 350 °C. Use, not suitable for brazing of aluminum bronze / stainless steel with heat resistance requirements
Copper-based solders are more and more widely used in aerospace and other fields. They have the characteristics of moderate melting temperature and excellent wettability, such as Cu-P, Cu-Zn and other series of solders, but they are used in aluminum bronze / When brazing stainless steel, there are problems of high brazing temperature, poor wettability on the surface of aluminum bronze, and low heat strength. When the temperature is higher than 400°C, the joint strength drops sharply, which cannot meet the heat resistance requirements of aluminum bronze / stainless steel. Thermal Strength Requirements of Components for Brazed Structures
To sum up, for the welding of aluminum bronze / stainless steel components, there is currently no one with a low melting point (brazing temperature is lower than the melting point of aluminum bronze at 1040-1100°C), good wettability, and good heat resistance, which can meet The ideal brazing filler metal required by the application environment for thermal strength of components

Method used

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  • Active heat-resistant copper-based solder for aluminum bronze/stainless steel brazing and preparation method thereof
  • Active heat-resistant copper-based solder for aluminum bronze/stainless steel brazing and preparation method thereof
  • Active heat-resistant copper-based solder for aluminum bronze/stainless steel brazing and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] In the present embodiment, the steps of the preparation method of the active heat-resistant copper-based solder for aluminum bronze / stainless steel brazing are as follows:

[0035] (1) Ingredients

[0036]Cathode copper with brand Cu-CATH-1, electrolytic manganese with brand DJMnD99.8, electrolytic nickel with brand Ni9999, silver with brand IC-Ag99.90, zinc ingot with brand Zn99.99, and Si with brand -1 industrial silicon, zirconium grade Zr-1, copper-phosphorus master alloy with a P content of about 14wt%, and a nickel-boron master alloy with a B content of about 16wt% as raw materials, according to the following components and percentages Content ingredients: Mn 21.0wt%, Ni 11.5wt%, Ag 23.0wt%, Zn 1.0wt%, Si 0.3wt%, P 0.2wt%, B 0.2wt%, Zr 1.5wt%, the balance is Cu; The total amount is 10.0kg.

[0037] (2) Melting

[0038] Put the raw materials prepared in step (1) except the active element zirconium into the crucible, put the crucible into a vacuum induction melti...

Embodiment 2

[0047] In the present embodiment, the steps of the preparation method of the active heat-resistant copper-based solder for aluminum bronze / stainless steel brazing are as follows:

[0048] (1) Ingredients

[0049] Cathode copper with brand Cu-CATH-1, electrolytic manganese with brand DJMnD99.8, electrolytic nickel with brand Ni9999, silver with brand IC-Ag99.90, zinc ingot with brand Zn99.99, and Si with brand -1 industrial silicon, lithium brand Li-3, copper-phosphorus master alloy with a P content of about 14wt%, and a nickel-boron master alloy with a B content of about 16wt% are used as raw materials, according to the following components and their percentages Content ingredients: Mn 21.0wt%, Ni 12.0wt%, Ag 22.0wt%, Zn 1.5wt%, Si 0.2wt%, P 0.1wt%, B 0.2wt%, Li 0.5wt%, the balance is Cu; The total amount is 9.9kg.

[0050] (2) Melting

[0051] Put the raw materials prepared in step (1) except the active element lithium into the crucible, put the crucible into a vacuum indu...

Embodiment 3

[0059] In the present embodiment, the steps of the preparation method of the active heat-resistant copper-based solder for aluminum bronze / stainless steel brazing are as follows:

[0060] (1) Ingredients

[0061] Cathode copper with brand Cu-CATH-1, electrolytic manganese with brand DJMnD99.8, electrolytic nickel with brand Ni9999, silver with brand IC-Ag99.90, zinc ingot with brand Zn99.99, and Si with brand -1 industrial silicon, zirconium with grade Zr-1, hafnium with grade HHf-1, copper-phosphorus master alloy with P content of about 14wt%, nickel-boron master alloy with B content of about 16wt% as raw materials, according to the following Components and their percentage ingredients: Mn 21.0wt%, Ni 13.0wt%, Ag25.0wt%, Zn 2.0wt%, Si 0.4wt%, P 0.3wt%, B 0.3wt%, Zr 1.0wt% , Hf 0.05wt%, the balance is Cu; the total amount of raw materials is 10.3kg.

[0062] (2) Melting

[0063] Put the raw materials prepared in step (1) except the active elements zirconium and hafnium into...

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Abstract

The invention provides active heatproof copper-based brazing filler metal used for aluminum bronze / stainless steel brazing. The active heatproof copper-based brazing filler metal comprises, by weight, 20.0-23.0% of Mn, 10.0-13.0% of Ni, 21.0-25.0% of Ag, 0.5-2.0% of Zn, 0.2-0.4% of Si, 0.1-0.3% of P, 0.1-0.3% of B, 0.01-3.0% of active elements and the balance Cu; and the active elements include at least one of Zr, Li and Hf. The invention further provides a preparation method for the brazing filler metal. According to the active heatproof copper-based brazing filler metal used for aluminum bronze / stainless steel brazing and the preparation method thereof, heterogeneous brazing of aluminum bronze / stainless steel can be achieved, soldered joints are made to have good heat resistance, the brazing process performance is improved, and the cost is lowered.

Description

technical field [0001] The invention belongs to the technical field of brazing, in particular to an active heat-resistant copper-based brazing filler metal for aluminum bronze / stainless steel brazing and a preparation method thereof. Background technique [0002] Brazing technology is a welding process that uses liquid solder below the melting point of the base metal to connect the base metal. During the brazing process, only the brazing filler metal melts, and the molten brazing filler metal fills the seam and produces a certain physical and chemical interaction with the base metal, and finally cools and solidifies to form a firm joint. Brazing has unique advantages and flexibility in the connection of new materials, heterogeneous materials and the manufacture of complex and fine structural parts, and is an important connection technology. Aluminum bronze (QAl7, QAl9-4, QAl10-4-4, etc.) is mainly composed of Cu and Al, containing a small amount of Fe and Ni elements, with ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/30B23K103/18
CPCB23K35/302B23K2103/18
Inventor 颜家振李宁郑义刘文博曹永同
Owner SICHUAN UNIV
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