A Guide to the Operation of Solder Wires

Generally, in the manual iron soldering, the temperature of iron head should be the temperature of the melting point of solders plus 150℃. The temperature of the lead solder wires can generally be set as 330℃, and the temperature of non-free solder wirescan generally be set as 370℃. The right sequence of manual iron soldering should be the temperature of the first contact of the pad. The heat will be transmitted to the pad so that there will be a rise in the temperature of the pad. Then place the solder wires on thepad. Now, the temperature of the pad should be high enough to melt the solders and form bonding. Therefore, the melted solders have the properties of flowing towards the direction of higher temperatures to contact the pad first of all. It will soon flow to thepart of the iron head contact so as to ensure that the perimeters of the pad will be well distributed with solders. If the supplied solder wires directly contact the iron heads, the solder wires will be soon melted and cover at the welds. If other parts of work pieces fail to live up to the welding temperature, it is easy to form virtual soldering point. Special attention should be paid that the solder wires should directly contact the iron heads. Since the temperature of iron heads is very high, this will easily cause spatters, or may burn workers when the case is severe.

Take out irons: When the solders have adequately wetted the welded parts, and the solders have not wholly volatile and forms shiny pads. Separate it immediately (2 or 3 seconds for welding at each pad). If the welded surface is loss of gloss or is coarse, it indicates that the withdrawal is too late.