Introduction to the characteristics of tee in stainless steel pipe fittings
There are many types of stainless steel pipe fittings, which refer to alloy steels with Cr content greater than or equal to 13% and stainless steel in the atmosphere. There are austenitic stainless steel, ferritic stainless steel, martensitic stainless steel and so on. Stainless steel generally does not have magnetism, austenitic has no magnetism, but ferrite has, but it is relatively weak. Different stainless steels have different corrosion resistance and different corrosion resistance to different media. The difference between carbon steel and stainless steel pipe fittings is generally believed to be the first in terms of corrosion resistance. However, in practical applications, stainless steel has excellent various properties that cannot be replaced by other steel types, such as some high-temperature resistant stainless steels, and the surface characteristics of stainless steel are widely used as decorative materials, as well as the excellent mechanical properties of stainless steel. Make it used in various manufacturing industries. Austenitic stainless steel is added with high chromium and nickel (chromium content is about 18%, Ni is more than 4%), the internal structure of the steel presents a state called austenite, which is If it is not magnetic, it cannot be attracted by a magnet. Commonly used as decorative materials, such as stainless steel pipes, towel racks, tableware, stoves, etc. Martensitic stainless steel is used to make knife and scissors stainless steel. Because the knife and scissors have the function of cutting objects, they need to have sharpness and hardness. This kind of stainless steel undergoes heat treatment to make the internal structure change, and the hardness can be increased before it can be used as a knife. However, the internal structure of this type of stainless steel is tempered martensite, which is magnetic and can be attracted by magnets. Therefore, we cannot simply use whether it is magnetic or not to explain whether it is a stainless steel material. Introduction of stainless steel tee: 1. Start the arc on the groove surface, and immediately retreat to the starting welding point of the slope root (usually about 10mm before the 6 o'clock position). When you see that it starts to melt, quickly add the welding wire to make the welding wire and the base material Fusion all the way, then you can see that the melt and slag flow evenly into the tube through the groove to form a molten hole; the welding torch makes a small zigzag swing, moves upwards slightly, the welding wire never leaves the argon protection, and it must be attached. In the gap between the blunt edges of the groove, the intermittent wire feeding method is adopted, one pulling and one sending, and one drop is filling into the molten pool. 2. During the welding process, the short arc operation must be maintained; the handle must be stable, the wire feeding must be clean and neat, pay attention to the distance between the welding wire and the tungsten electrode, to prevent 'tungsten3. The stainless steel three-way control melting hole is large and small, and the shape is the same as the key to the double-sided forming of the bottom welding. 4. In the process of bottom welding, the welding wire should be melted evenly, and a thin layer of slag should evenly penetrate into the nozzle to protect the welding seam. This is why the welding wire with flux is used. 5. After the stainless steel tee is welded, hammer hammering will cause the welding slag to fall off; compressed air or water flushing can also be used to drop the welding slag in the pipe, so that a beautiful golden yellow weld can be obtained in the pipe.