Aluminum alloy welding process Gas welding of aluminum alloy Oxygen-acetylene welding thermal efficiency is low, the welding heat input is not concentrated, welding aluminum and aluminum alloy need to use flux, after welding and need to remove residue, joint quality and performance is not high. Because the gas welding equipment is simple, does not need…
Spot welding principle It refers to the welding method of forming a solder joint between the contact surfaces of two lap workpieces by using a columnar electrode. Spot welding, the first pressure to make the workpiece close contact, then connect the current, the workpiece contact melting under the action of resistance heat, after cooling the…
Laser welding process Especially in the field of automobile industry has been paid attention to and widely used, in which the automobile cover is one of the five categories of laser welding. It can reduce body weight, improve body assembly precision, increase body stiffness, and reduce stamping and assembly cost in the process of automobile…
Generally speaking, to form a beautiful and strong weld grain, there are several major points. First: the hand should be stable, can not shake, which is directly related to the molding of the weld grain is beautiful. Second: time to master, the thicker the steel plate, can lengthen the welding time, otherwise easy to weld…
MAG welding is the English abbreviation of the very active gas arc welding. It is a mixed gas shielded welding formed by adding a small amount of oxidizing gas (oxygen, carbon dioxide or its mixture) into argon gas. In China, 80%Ar+20%CO2 mixed gas is commonly used. Because the proportion of argon in the mixed gas…
Weld preparation Welding equipment: ZX7-400-3 welding machine is used for root welding; Bear Valley ZD-500 multi-function semi-automatic welding machine is used to fill and cover the surface. Welding materials: root welding using Bole Φ3.2E6010 cellulose electrode; Lincoln E81T8-Gφ2.0 flux core self-protective welding wire is used for filling and capping. Groove cleaning: before the group, the…
Medium carbon steel refers to the carbon content of 0.25% ~ 0.60% of the carbon steel, including high quality carbon structure in 30, 35, 45, 50, 55, and cast carbon steel in ZG230-450, ZG270-500, ZG310-570, ZG340-640 and other steel. Because the carbon content of medium carbon steel is higher than that of low carbon steel,…
In the welding process of steel bar processing, some quality problems that often occur and generally exist are very harmful and easy to cause major engineering accidents. Lack of penetration Not fully welded, refers to the failure to form crystallization or welding in the welding area is not strong, joint upsetting or deformation is too…
The reason: Slotting Angle is too small, resulting in pear shape and weld bead cracks during high current welding. Preventive measures: Pay attention to the appropriate grooving Angle and current match, if necessary to increase the grooving Angle. The reason: Excessive carbon and other alloys in the base metal (weld pass and thermal shadow zone).…
This kind of steel is used for high strength welding structure steel, the carbon content is limited to a low level, usually the mass fraction of carbon is less than 0.18%, and the design of alloy composition has also considered the requirements of weldability, so the welding of low carbon quenched and tempered steel is…
