Welding rod easy to prepare and capable of accurately controlling weld metal alloying

Abstract

The invention belongs to the field of welding materials, and particularly relates to an welding rod easy to prepare and capable of accurately controlling weld metal alloying. The welding rod comprises a metal core wire, a coating and a covering, the coating is uniformly coated outside the metal core wire, the covering is uniformly wrapped outside the coating, and the coating contains mixed powder capable of alloying. The alloying mixed powder can be completely melted along with the core wire under the combustion of an electric arc, so that weld metal is alloyed, the phenomenon that part of particles are not melted and are combined with slag to cause waste is avoided, and the utilization rate of alloy elements is increased; when the components and the content of alloying mixed powder in the coating are designed, accurate control can be achieved according to actual requirements, and the phenomenon that when alloying powder is added into the covering for alloying, the alloying degree fluctuates greatly along with changes of welding parameters is avoided; and according to an alloying mode, the non-alloy steel core wire easy to prepare can be adopted, the preparation difficulty is reduced, and the production efficiency is high.

Description

technical field [0001] The invention belongs to the technical field of welding materials, in particular to an welding rod which is easy to prepare and can accurately control the alloying of welding seam metal. Background technique [0002] With the development of modern industrial technology, new materials are constantly being developed. As we all know, all materials can only be used if they form structural parts. Welding is the most direct and convenient way to form structural parts, and welding materials are an important part of welding technology. Part, the development of high-performance welding materials has become an important task in the field of material forming. [0003] The chemical metallurgical process in which various substances in the welding zone interact at high temperature during welding is a remelting process under welding conditions. The alloying process of the weld metal by the melting of the welding material is to transfer the required alloying elements...

AI Technical Summary

Problems solved by technology

[0004](1) Application of alloy welding wire or welding core made of alloy steel coated electrode, the disadvantage is that after adding alloying elements to the welding wire or welding core, it is not suitable for rolling Processing, wire drawing and other processing, the preparation is difficult

[0005] (2) Flux cored wire or flux cored electrode is used, the disadvantage is that the core powder is located in the center, the conductivity is poor, the arc combustion is unstable, and the welding process is not good

[0006](3) The alloy powder is pre-placed in the welding area, the disadvantage is that the weld is not well formed and the chemical composition is not uniform

[0007] (4) Apply coating containing alloy mixed powder, that is, add the required alloying elements to the coating of the electrode in the form of particles. The disadvantages are: ① welding The arc is a mobile power source, the melting and solidification process of the welding zone takes a short time, the alloy element particles cannot be completely melted, and some unmelted alloy particles directly form slag, and the utilization rate of the alloy powder is low; ② due to welding parameters under different working conditions (including Welding current, welding voltage, welding speed, etc.), the melting of alloy powder cannot be accurately controlled, that is, the alloying degree of weld metal cannot be accurately controlled, and the expected purpose cannot be fully realized

Images