Solder sheet for black copper and silver production and preparation method thereof

Abstract

The invention discloses a soldering sheet for manufacturing black copper with sliver running through and a preparation method thereof. The soldering sheet for manufacturing black copper r with sliverrunning through is prepared from, by mass: 100 parts of sliver powder, 15-25 parts of red copper, 10-15 parts of zinc powder, 2-5 parts of salt, and 0.2-0.8 part of white arsenic. The method comprisesthe steps that after mixing the components, heating the components to melt into an alloy and then making the alloy into a sheet, that is, the soldering sheet is completed; cutting the soldering sheetinto small pieces according to the size of the to-be-welded black copper with sliver running through, proportionally mixing the sodium borate and water, stirring and heating the mixture of the sodiumborate and water; painting the mixture on weld bonds or welded joints, dipping the smaller pieces into the mixture and heating by a welding gun, and then the weld bonds or welded joints can be welded. The soldering sheet for manufacturing black copper with sliver running through and the preparation method thereof enable the welded parts to stay firm without falling-off and the soldering flux smooth. The welding temperature is proper, the sliver grain pattern is not damaged and the silver in the gains neither is melted by heating nor flows out, so that the effect of the elegant combination ofthe black copper and the silver is achieved. The soldering sheet for manufacturing black copper with sliver running through and the preparation method thereof effectively improve the efficiency of manufacturing black copper with silver running through. The operation is convenient and the effect is lasting.

Description

technical field [0001] The invention belongs to the technical field of handicraft production, and relates to a soldering sheet used for the production of black copper and silver and a preparation method thereof. Background technique [0002] Black copper and silver is a unique Chinese traditional copper handicraft in Yunnan. It uses copper as the tire, engraves various patterns on the tire, and then fills the pattern with molten silver (or gold) water, and polishes it smooth after cooling. After a long time, the bottom copper will naturally turn black, revealing silver (or gold) patterns, presenting a black and white (or black and yellow) distinct decorative effect, antique, elegant and unique. Because it is mostly inlaid with silver, it is called "black copper and silver". [0003] The process steps of black copper and silver are as follows: 1. Refining black copper alloy; 2. Forging black copper sheet; 3. Lofting; 4. Cutting material; Silvering; Eighth, Rough Grinding; N...

AI Technical Summary

Problems solved by technology

During the welding process, due to the fine chiseled lines, using conventional silver soldering requires a high temperature of about 700°C to solder, but it will damage the silver pattern, and the silver that goes in is easy to come out; if conventional soldering is used , can be welded at a low temperature of about 200°C, but the welded part is very easy to fall off, the flux is not strong, and it is difficult to withstand tests such as stretching, peeling, tearing, and depression