A double-coated coating wear-resistant electrode and its manufacturing method

Abstract

The invention discloses a double-coated wear-resistant electrode and a manufacturing method thereof. The double-coated wear-resistant electrode comprises a core wire and coatings, wherein the cross section of the core wire is flat; and the coatings include an inner coating and an outer coating, the outer wall of the core wire is coated by the inner coating, a flat plane of the inner coating is coated by the outer coating, and a paint of the outer coating is prepared by binding tungsten carbide particles with the particle sizes of 1-3mm by using a binder. Compared with the existing round-rod-shaped wear-resistant electrode, the double-coated wear-resistant electrode has the beneficial effects that the wear resistance of the wear-resistant electrode can be improved; meanwhile, the favorable surfacing processing property of the coated wear-resistant electrode can be kept; in addition, the double-coated wear-resistant electrode is high in melting speed and melting efficiency, beautiful in surfaced appearance and capable of surfacing wide welding seams without arc oscillation and saving energy and electricity in the surfacing process. Compared with the existing tubular wear-resistant tungsten carbide electrode, the double-coated wear-resistant electrode is high in melting speed and melting efficiency, convenient to operate when being used, low in cost and beautiful in surfaced appearance.

Description

Technical field [0001] The invention belongs to the field of welding materials and relates to a wear-resistant electrode, in particular to a double-coating coating wear-resistant electrode and a manufacturing method thereof. Background technique [0002] Wear-resistant electrode, also known as surfacing electrode, is a kind of electrode that is surfacing a layer of wear-resistant alloy surface on a certain part of the surface of the workpiece. Its purpose is to improve the wear resistance of the working surface and prolong the service life. The surfacing is generally based on the use requirements To select welding rods with different alloy systems and different hardness levels. Wear-resistant electrodes are often used for surfacing welding of new wear-resistant parts and repairing old worn-out parts. Due to their flexible and convenient operation, complete varieties and specifications, and high cost performance advantages, they are very versatile and still It is one of the most w...

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Problems solved by technology

[0004] As we all know, the vast majority of wear-resistant electrodes achieve the wear resistance of electrodes by adding wear-resistant materials to the electrode coating or by generating wear-resistant phases in the surfacing metallurgical process, so people will more wear-resistant carbonization The application of tungsten materials to wear-resistant electrodes can significantly improve the wear resistance. For example, adding high wear-resistant material tungsten carbide powder to the coating can significantly improve the wear resistance, but due to the limited formula ratio, the amount added is limited Yes, and powder tungsten carbide is easy to decompose and form other phases during the surfacing process, thereby reducing the wear resistance of tungsten carbide itself. If tungsten carbide particles are added, it is difficult to press-coat coated electrode products. In order to solve this problem The problem is that people have changed the structure of the electrode and developed a tungsten carbide tubular wear-resistant electrode. In order to ensure the original wear resistance of the carbide, a certain particle size of tungsten carbide is added to the electrode iron tube, and the proportion of tungsten carbide is relatively high. Large, reflecting high wear resistance, but this kind of electrode uses flame or carbon arc or other heat sources to melt it to achieve surfacing welding, so it is far less convenient than coating wear-resistant electrode during use, and the surfacing welding is also formed. Not as good as coated wear-resistant electrodes

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