a welding rod

Abstract

The invention provides a welding electrode which comprises a welding wire and a coating. The coating comprises, by weight, the components of 34%-37% of nitrocellulose, 36%-38% of calcium carbonate, 7%-9% of ferromanganese, 17%-19% of sodium ferrite and 1%-3% of sodium chloride. The welding electrode has the advantages that nickel which is harmful to human bodies and fluorine which harms the atmospheric ozone layer are not contained, namely cancerogenic substances and harmful gas of fluoride slag are not generated during a welding process, non-toxic performance is achieved, dust is low, electricity is saved, harm and influence on ecological environment and the life of an electrowelding technician are avoided, all kinds of carbon steel, alloy steel and casting pieces can be directly subjected to cold welding without preheating, compared with a similar welding rod, anti-cracking performance is good, super toughness and super plasticity are achieved, different metal materials such as ferrite, pearlite, and austenite with different qualities can be subjected to overall combined welding, and welding seams are firm and solid.

Description

Technical field [0001] The invention relates to an electric welding rod. Background technique [0002] Traditional welding rods have the following shortcomings and shortcomings in use: ①The nickel carbonyl produced during welding can continuously increase the benzopyrene in the human body or cause mutations in the human body's DNA. Therefore, the long-term use of this type of welding electrode by electric welding technicians can cause cancer and serious Hazard to health; ②The harmful gas of fluoride slag generated during welding destroys the atmospheric ozone layer, endangering environmental quality and ecological balance; ③The parts to be welded need to be preheated during welding, which not only increases the process , Increase the production cost, and affect the welding efficiency; ④In welding, it is difficult to realize the welding of different quality ferrite, pearlite, austenite and other metal materials with different phases. Summary of the invention [0003] In view of th...

AI Technical Summary

Problems solved by technology

[0002] Traditional electrodes have the following defects and deficiencies in use: ① Nickel carbonyl produced during welding can continuously increase benzopyrene in the human body or cause mutations in human DNA, so long-term use of such electrodes by electric welding technicians can cause cancer, serious Harmful to health; ②The harmful gas of fluoride slag produced during welding destroys the atmospheric ozone layer, endangering environmental quality and ecological balance; ③The parts to be welded need to be preheated during welding, which not only increases the process , which increases the production cost and affects the welding efficiency; ④In welding, it is difficult to achieve joint welding for different metal materials such as ferrite, pearlite, austenite and so on.