Silver-free copper based solder and preparation method thereof

The invention relates to a silver-free copper based solder and a preparation method thereof, particularly to the silver-free copper based solder for soldering of compressor case covers and copper tubes. The silver-free copper based solder comprises, by weight, 56-68% of Cu, 29-38% of Zn, 0.5-8% of S...

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Hauptverfasser: WANG XIAOYAN, WANG CAIYING, SHEN YANG, GE HONGQI
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Sprache:chi ; eng
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creator WANG XIAOYAN
WANG CAIYING
SHEN YANG
GE HONGQI
description The invention relates to a silver-free copper based solder and a preparation method thereof, particularly to the silver-free copper based solder for soldering of compressor case covers and copper tubes. The silver-free copper based solder comprises, by weight, 56-68% of Cu, 29-38% of Zn, 0.5-8% of Sn, 0.5-8% of Mn, 0.1-2% of In and other microelements. The preparation method includes fully melting the Cu, the Sn, the Mn, the In and the other microelements to obtain a master alloy; adding Zn into the cooled master alloy with full stirring; taking the alloy out of a furnace; preparing an ingot through pouring; and preparing the ingot into solder wires through extrusion and drawing. The silver-free copper based solder and the preparation method thereof have the advantages that the soldering temperature is 815-865 DEG C and satisfies the process requirement, high silver based solders can be replaced, the cost is low, and the metallographic grain size after welding is low.
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The silver-free copper based solder comprises, by weight, 56-68% of Cu, 29-38% of Zn, 0.5-8% of Sn, 0.5-8% of Mn, 0.1-2% of In and other microelements. The preparation method includes fully melting the Cu, the Sn, the Mn, the In and the other microelements to obtain a master alloy; adding Zn into the cooled master alloy with full stirring; taking the alloy out of a furnace; preparing an ingot through pouring; and preparing the ingot into solder wires through extrusion and drawing. 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language chi ; eng
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subjects CLADDING OR PLATING BY SOLDERING OR WELDING
CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING
MACHINE TOOLS
METAL-WORKING NOT OTHERWISE PROVIDED FOR
PERFORMING OPERATIONS
SOLDERING OR UNSOLDERING
TRANSPORTING
WELDING
WORKING BY LASER BEAM
title Silver-free copper based solder and preparation method thereof
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