In order to ensure the performance and quality of the welded components, improve the plasticity of the weld metal, eliminate or reduce the welding residual stress, prevent cracks, and heat-treat the welded components if necessary. According to the order of the heat treatment process and the welding process, the heat treatment of the welded component is often divided into three types: pre-heat treatment, post-heat treatment and post-weld heat treatment....

High-frequency brazing refers to heating the weld to the temperature at which the alloy solder melts by heating, but at this time the welded metal still does not reach the melting temperature, and the low-melting alloy bonds the two metals together by strong surface tension. After cooling, a solid weld is formed....

Induction brazing is a welding method that uses high frequency, intermediate frequency or power frequency induced current as a heat source. High frequency heating is suitable for welding thin walled pipe fittings. Brazing is performed on the site away from the power supply by using coaxial cable and split induction coil....