Welding technology and soldering

Welding Technology and Tin Welding
Welding, also known as welding (welding), is the use of heating high temperature and high pressure way to join the enterprise or other thermal type materials manufacturing I art and technology.
Welding is usually divided into three categories, depending on the way in which the purpose of bonding is achieved,
1. Fusion welding
Fusion welding, also known as fusion welding, is one of the most common welding methods. In the process of welding, the workpieces that need to be welded are heated so that they melt locally. Because the welded workpiece is tightly attached, under the action of temperature field, gravity and so on, the molten liquid of the two workpieces will be mixed without external pressure. When the temperature is lowered, the melting part condenses and the two workpieces are firmly welded to complete the welding. If necessary, the weld can be added to the welding of the human melt filler assisted welding. The common arc welding, electroslag welding, gas welding, electron beam welding, laser welding and so on all belong to the fusion welding.
2. Brazing
Brazing refers to the use of filler metal with a lower melting point than that of the workpiece being welded (solder), which heats the workpiece and the powder to a higher melting point than the solder, and below the melting temperature of the workpiece being welded to moisten the workpiece by the capillary action of the liquid medium, The method of filling the joint yard and diffusing each other with the welded workpiece.
3. Contact welding
Genjit is a postal connection technology that can obtain reliable connections without the need for gauging materials and fluxes. Only at a temperature equal to or below the melting point of the welded workpiece, the welding method of infiltrating and joining the two workpieces by means of high pressure superposition, extrusion or vibration is used.
Needle welding is mainly used in the manufacture of electronic products. According to the melting point of solder is higher or lower than 450 degree, brazing can be divided into hard welding and soft welding. Tin welding is a kind of soft welding. It mainly refers to a method of welding with tin lead solder with low melting point.
Tin welding is one of the earliest and most widely used welding methods, which still occupies a large proportion at present. Compared with other welding methods, tin welding has the following characteristics.
1) the melting point of the solder is between 180 ~ 320C. Most metal materials can be welded by tin welding. During welding, the workpiece and welding section are heated at the same time, the solder melts and the welded workpiece does not melt.
The operation is convenient and the welding method is simple. Direct use of molten solder infiltration to achieve the solder joint, there are no precise requirements for heat and solder, the solder joint is easy to achieve.
The welding material is cheap, the welding tool is simple, and the welding cost is lower than other welding methods.
                            From Allicdata electronics