Environment-friendly silver-free welding rod

Abstract

The invention discloses an environment-friendly silver-free welding rod which is composed of, by mass, 35%-50% of copper rings, 10%-30% of zinc, 10%-20% of silicone, 5%-10% of tin, 5%-15% of bismuth and 2%-8% of rare metal alloy. The environment-friendly silver-free welding rod is simple in ingredient, low in manufacturing cost, free of pollution, good in welding effect, good in drilling-through rate, large in infiltration capacity, high in strength, good in airtightness and capable of better replacing solder containing silver.

Description

technical field [0001] The invention relates to the technical field of brazing materials, in particular to an environment-friendly silver-free welding rod. Background technique [0002] With the continuous advancement of science and technology, it brings serious environmental pollution problems at the same time. As people's awareness of environmental protection and legal concept of environmental protection are increasing day by day, people are paying more and more attention to environmental protection. [0003] In industrial production, welding equipment and electrodes are commonly used tools and materials. On the one hand, many manufacturers still use old high-silver products for pipeline welding, such as the most common materials of 45 silver, 35 silver, and 25 silver. Increase; although some manufacturers have replaced lower silver products, but due to the precious metal silver in the composition, the price is still not much advantage in today's increasingly fierce comp...

AI Technical Summary

Problems solved by technology

On the one hand, many manufacturers still use old high-silver products for pipeline welding, such as the most common materials of 45 silver, 35 silver, and 25 silver. Increase; although some manufacturers have replaced lower silver products, but because the precious metal silver is in the composition, the price is still not much advantage in today's increasingly fierce competition

On the other hand, most of the common welding rods contain toxic and polluting components, which will be volatilized during welding production and produce toxic vapors, which are relatively harmful to the human body.

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