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Flux-cored welding wire first appeared in the United States and Germany in the 1920s. However, it was not until the 1950s that it was really widely used in industrial production, especially after the 1960s and 1970s. With the emergence of fine-diameter (below φ2.0mm) all-position flux-cored weldi...Read more »
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The energy source of brazing can be chemical reaction heat or indirect heat energy. It uses a metal with a melting point lower than that of the material to be welded as the solder. After heating, the solder melts, and the capillary action pushes the solder into the gap between the contact surface...Read more »
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Harmful factors of welding materials, what should be paid attention to when using welding materials?Harmful factors of welding materials (1) The main research object of welding labor hygiene is fusion welding, and among them, the labor hygiene problems of open arc welding are the biggest, and the problems of submerged arc welding and electroslag welding are the least. (2) The main harmful fa...Read more »
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Welding can use AC or DC welding machine. When using a DC welding machine, there are positive connection and reverse connection. Factors such as the electrode used, the condition of the construction equipment, and the welding quality should be considered. Compared with AC power supply, DC power s...Read more »
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Red head thoriated tungsten electrode (WT20) Currently the most stable and widely used tungsten electrode is mainly used in the welding of carbon steel, stainless steel, silicon copper, copper, bronze, titanium and other materials, but it has slight radioactive pollution. Gray head cerium tungst...Read more »
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Argon tungsten arc welding uses argon as a shielding gas to heat and melt the welding material itself (it is also melted when the filler metal is added) by means of the arc generated between the tungsten electrode and the weld body, and then forms the welding of the weld metal Way. The tungsten e...Read more »
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What is flux-cored arc welding? Flux-cored wire arc welding is a welding method that uses the arc between flux-cored wire and workpiece to heat, and its English name is simply FCAW. Under the action of arc heat, welding wire metal and workpiece are connected by melting, forming a weld pool, arc f...Read more »
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When welding stainless steel, the performance of the electrode must match the purpose of the stainless steel. Stainless steel electrode must be selected according to the base metal and working conditions (including working temperature, contact medium, etc.). Four types of stainless steel as well ...Read more »
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– FLUX– Flux is a granular welding material. During welding, it can be melted to form slag and gas, which plays a protective and metallurgical role on the molten pool. Constituent Flux is composed of marble, quartz, fluorite and other ores and titanium dioxide, cellulose and oth...Read more »