Materials And Accessories For Exothermic Welding
Heat source material for exothermic welding
Exothermic welding is a common metal joining process that is widely used today and is an efficient and simple joining technique, mainly through the heat of chemical reactions carried out by metal compounds as a heat source, followed by direct or indirect heating by thermal reduction of molten metal to form the desired shape and size in a specific mold.
In exothermic welding processes, exothermic solder powder, also known as exothermic flux, is often used. It is usually used as a heat source for exothermic welding to facilitate the welding process. This is a material that uses an exothermic solvent as a chemical reaction to produce high temperatures and a molten film to achieve the purpose of welding.
The main components of exothermic solder powders are copper oxide, aluminum, etc. The melting point is very high, more than 1083 degrees Celsius, with good resistance and tensile strength up to 340 Mpa. exothermic welding powder produced by Sichuan Sunlight Intelligent has good electrical conductivity, through practical testing, the rate of change of DC resistance before and after welding is close to zero. The current-carrying capacity of the fusion joint is the same as that of the conductor, and with the aid of this chemical powder, a very good exothermic welding effect can be achieved, which is incomparable to the orthodox metal joining process.
Since the structure of the welded joint is a molecular structure, there is no aging and it can be permanently maintained. The solder joint is covered by copper and therefore has a high corrosion resistance. The use of exothermic soldering powder for exothermic soldering connection process, this operation is relatively simple and convenient. Therefore set, it is popular. Widely used in welding, alloy, rail, cast iron and other kinds of steel as well as stainless steel heating heat source materials, has a good range of application.
Accessories for exothermic welding
In the exothermic welding process, many accessories are often used, and mold clamps are often used. The main reason is that when exothermic welding is performed, a large amount of heat is generated and just the temperature rises, while usually the temperature of exothermic welding reaches over 200 degrees Celsius and cannot be hand-held, and professional matching mold clamps are needed for use in order to open and close the mold. Therefore the constant scale clip is one of the essential exothermic welding accessories.
Usually we have to check the mold clamps and mold opening direction before using the mold clamps, we have to check the opening and closing mold clamps first and observe the degree of mold closing, mainly to see if there are gaps and whether the closing is smooth. When we find that there is a gap, we need to remove the latch and adjust the degree of closure by screws, generally speaking, we can achieve a perfect closure. In addition, it should be noted that the side positioning pins on the side lugs of the mold clamps inserted into the small positioning holes of the mold do not need to be screwed too tightly, and need to give a certain range of movement. Because it may expand during the welding, it needs a certain space. After checking the basic condition of the mold clamps, you can carry out the regular exothermic welding work.
Sichuan Sunlight Intelligent Co., Ltd. manufactures various exothermic welding materials, exothermic welding molds, exothermic welding mold clamps, etc. and has been committed to providing quality products to our customers.
