Keyword: pcb board, PCB, circuit board
Welding is the use of metal alloy ( solder ) pcb board to connect two or more pieces of metal together with the process , circuit board where in the solder melting temperature lower than that of metal to be welded . Soldering temperatures below 450 ' called soft soldering , usually used precious jewelry welding brazing ( hard soldering rape ) pcb board temperature exceeds 450' . Hard solder for soldering silver , gold, steel circuit board, and copper and other metal , the welding point is pcb board much more solid than the soft soldering , the shear stress than the soft solder sturdy 20-30 times .
A hard soldering / welding solder Hard Place All non -ferrous metals ( gold , silver, copper , brass , bronze ) have a higher melting temperature , circuit board can be gold solder or silver solder alloy for welding, pcb board a variety of different melting temperatures , the shape and composition of the gold solder and available silver solder circuit board. Gold and silver solder melting temperature of the solder alloy is cast on the alloy content of the decision , the higher the content cast , the lower melting temperature , however, the speech is also the low melting temperature of the solder alloy of silver micro yellow pcb board or gray. When speech is exhausted excessive heating the solder , the solder seams appear concave point , therefore , the use of high melting temperature solder or heating temperature control can prevent the emergence of pits . For welding steel, copper, hard solder alloys containing silver, copper, zinc and zinc, cadmium and other metals.
Hard to be very careful when soldering circuit board, welding flame dangerous flames pcb board, heat the solder alloy harmful chemical fumes , poor ventilation flux venue is unsafe , it must be strictly complied with equipment manufacturers specifications and warnings pcb board.
