processingdetails

Soldering

Soldering is a kind of general metalworking process widely using in the many field, in which two or more metal objects are joined together by melting and flowing a filler metal into the joint, and the filler metal having a low melting point.  One kind of soldering is call as soft soldering,which is featured by the melting point of the filler metal, and the melting point of it is below 400 °C (752 °F).The filler metal used in the process is called solder. Compared to the brazing,soldering is distinguished from brazing by use of a lower melting-temperature filler metal. The filler metals are typically alloys that have liquidus temperatures below 350°C. It is distinguished from welding by the base metals not being melted during the joining process which may or may not include the addition of a filler metal. In a soldering process, heat is applied to the parts to be joined, causing the solder to melt and be drawn into the joint by capillary action and to bond to the materials to be joined by wetting action. After the metal cools, the resulting joints are not as strong as the base metal, but have adequate strength, electrical conductivity, and water-tightness for many uses. There is evidence that it was employed up to 5000 years ago in Mesopotamia.