What are the technical characteristics of welding processes using ceramic backings?
What are the welding methods using ceramic backing
The ceramic liner is prepared and sintered from a variety of ceramic raw materials and fluxes. It has the characteristics of high refractoriness, not easy to deform, and high mechanical strength. Applied to the production and processing procedures of shipbuilding, bridges, boilers, pressure vessels, steel structures, auto parts and other manufacturing industries, it can improve welding quality, reduce welding costs, improve the working environment, save energy and protect the environment, increase income and reduce enterprise expenses. Improve efficiency.
The use of ceramic backing as a welding processing aid is also an improvement in processing skills. After use, the welds are strong, crack-resistant, tough and mechanically stable. It is suitable for single-sided welding of flat, vertical and horizontal butt joints of general steel structures. That is, one-sided welding and double-sided molding. And the weld seam on the back is full, firm and beautiful.
So, what are the technical characteristics of these welding processes using ceramic liners ?
Horizontal welding is welding with a horizontal seam on a vertical or inclined plane. Short-arc welding should be used, with a smaller diameter welding current, and appropriate means of transport.
One-sided welding and double-sided forming refer to welding on one side, and the weld on the other side can also be well formed. It is mostly used for pipe welding and cannot be welded inside. Single-sided welding and double-sided forming include continuous arc welding and interrupted arc welding. Single-sided welding and double-sided forming operation technology is an operation method that uses ordinary welding rods and special operation methods to ensure that both sides of the groove can be obtained after welding the front side of the groove.
Since the molten iron is supported by the ceramic pads during welding, there is no need to worry about holes. If there is no lining, it must be controlled manually, and the processing parameters must be strictly controlled. At the same time, attention should be paid to the molding of the back side, and the technical requirements are extremely strict.
Welding ceramic backing, also known as welding ceramic matrix, is a ceramic material widely used in the welding process, mainly to ensure the penetration depth of the root of the material joint and the formation of the back of the weld. It acts as a pre-set foil device along the back of the joint.
The production of welding ceramic gaskets is to mix and granulate the powders of these oxides or mineral raw materials containing these oxides in proportion, and add inorganic binders so that the inorganic binders evenly cover the surface of the formed particles. Then the above-mentioned particles covered with inorganic binder are pressed into a gasket blank under a pressure of 75-150N/mm2; the above-mentioned gasket blank is sintered at a temperature of 1300-1380°C, and then the required welding ceramic lining is prepared pad material.
Welding ceramic backing materials are smooth, well-proportioned, beautiful, low porosity, strong waterproof and moisture-proof, slag removal and physical properties meet welding requirements. Whether it is flat welding or vertical welding position, the weld seam is uniform and smooth without gas. Press pit to ensure the quality of welding seam formation. Ceramic welded gaskets are used in heavy industry feed hoppers and their feed pipes. The function is to disperse the concentrated heavy impact of the conveyor belt during feeding, reduce the wear of the conveyor belt, and replace the ceramic liner at the place of heavy impact during the service life. Improve the service life of equipment and save equipment cost.