Vacuum fiber welding heat preservation time

Vacuum fiber welding heat preservation time

Time of heat preservation vacuum brazing is done in the condition of vacuum radiation heating. Although the base material thickness is not big, but after considering the loading furnace brazing joint was part of the cover, not directly by radiant heat, work caused by temperature difference, we under heated to solder the liquidus temperature suspends the heating, and under the temperature of heat preservation for a period of time, its aim is to reduce the temperature of the component gradient, make each part temperature homogenization welding and cutting.
Vacuum cooling due to the silver brazing temperature on silver copper alloy solder melting point, and the timely heat preservation, so at this time of silver and copper alloy has melted into liquid, has a certain liquid. Silver copper alloy for plasma arc cutting electrode solder has good electrical conductivity, brazing wettability, and good ability to fill is the numerical control plasma arc cutting electrode ideal solder. Trial, we will first component precooling below the melting point solder, n2 gas filling fast cold again, in order to ensure good between components, thus obtain satisfactory brazing quality.
The numerical control plasma arc cutting electrode after vacuum silver brazing, use in good condition. Import plasma arc cutting electrode using cutting from the plasma arc cutting electrode weld brazing component metallographic image is 300 m, and the use of vacuum silver brazing cutting distance has reached more than 500 m, has been applied in some domestic key enterprises, is gradually replace imports, widespread high praise. From the use of cylinder head bolt, reduced the premature failure of the bolts, such as the bolt fracture or fatigue, etc.). Look from the site conditions to improve the working environment, make originally the lampblack diffuses, ground of the condition of the oil is fundamental improved.