As can be seen from the brand, the tensile strength and yield strength of the latter are better than the former, but the plasticity and toughness are relatively poor.
Reheating or normalizing can improve the strength and plasticity of materials, but it has little effect on welding performance.
Welding: also known as welding and melting, is a manufacturing process and technology to connect other thermoplastic materials such as metals or plastics by heating, high temperature or high pressure. Welding can achieve the purpose of connection in the following three ways:
1, heating the workpiece to be connected to partially melt it to form a molten pool, and connecting the molten pool after cooling and solidification, and adding filler for assistance if necessary;
2. The low melting point solder is heated separately, and the workpiece is connected through the capillary action of the solder (such as soldering and brazing) without melting the workpiece itself;
3. At the temperature equal to or lower than the melting point of the workpiece, the two workpieces are infiltrated by high pressure, overlapping extrusion or vibration (such as forging welding and solid welding).
According to the specific welding process, welding can be subdivided into special welding such as gas welding, resistance welding, arc welding, induction welding and laser welding.
There are many sources of welding energy, including gas flame, arc, laser, electron beam, friction and ultrasound. Besides being used in factories, welding can also be carried out in various environments, such as outdoor, underwater and space. No matter where, welding may bring danger to operators, so appropriate protective measures must be taken during welding. Welding may cause harm to human body, including burns, electric shock, visual impairment, inhalation of toxic gases, excessive ultraviolet radiation, etc.