the different of common welding with brazing and soldering is that the soldering is formed by melting the solder with a lower melting point (below the melting point of the workpiece itself) without heating the melt itself.
there are many sources of energy for welding, including gas flame, arc, laser, electron beam, friction and ultrasonic etc. in addition to being used in the factory, welding can also be carried out in a variety of environments, such as wild, underwater and space. wherever possible, welding may be dangerous to the operator, so in the welding they must take appropriate protective measures. welding to the human body may cause harm, including burns, electric shock, visual impairment, inhalation of toxic gases, excessive ultraviolet radiation and so on.
