The invention discloses a large-size
copper-steel dense cavity component and a high-sealing-reliability
brazing manufacturing method of the large-size
copper-steel dense cavity component. A cylindrical
surface fitting and crossed
brazing filler metal groove structure is designed on a component structure, a
brazing filler metal presetting mode is that foil brazing
filler metal is fixed on a stainless steel side wall surface, and a brazing wire is placed in an
oxygen-free
copper side wall brazing filler
metal groove, so that the defect of large and small surrounding caused by large-area side wall surface brazing filler
metal joint filling is effectively overcome, and the side wall sealing reliability is improved. Through the stepped solder groove blocking and sealing structure, the problem of sealing of the side walls of multiple cavities on the cylindrical surface with the same
diameter is effectively solved, and the sealing efficiency is improved. The temperature of a workpiece in a furnace is monitored, uniform temperature rise of a large-size component is achieved in cooperation with a stepped uniform
temperature control mode, the synchronous melting, seam filling, solidification and
diffusion processes of brazing filler
metal in different areas of the component are achieved, and the probability of generation of brazing seam defects is reduced. Therefore, the technical problem of high-reliability sealing of circumferential welds among large-size dense multiple cavities is solved, and high-sealing
welding among copper / steel dense cavities is ensured.