METHOD FOR OBTAINING MOLYBDENUM AND GRAPHITE BRAZED JOINT Russian patent published in 2018 - IPC B23K1/19 B23K1/08 B23K35/30 B23K103/18 

FIELD: technological processes.

SUBSTANCE: invention can be used to produce a heat-resistant molybdenum-graphite brazed joint, in particular for manufacturing anodes of X-ray tubes. Method includes forming an assembly of molybdenum and graphite parts and a solder placed therebetween. Assembly is heated in a vacuum furnace with resistive heating to a soldering temperature of 1350 °C with a heating rate of 20 °C/min. Assembly is kept at this temperature for 30 minutes and cooled to a temperature of 900 °C with a cooling rate of 20 °C/min, after which the brazed assembly is cooled to room temperature at the furnace cooling rate. Solder used is fast-quenched powder solder containing the following components, wt%: niobium 7–10, zirconium 38–42, beryllium 1.2–1.7, titanium – balance. Concentric circular notches of a triangular cross-section may be made on the surface of the graphite part with spacing of not less than 0.4 mm and not more than 0.6 mm, a height of not less than 0.1 mm and not more than 0.3 mm.

EFFECT: technical result is high heat resistance and strength of the molybdenum and graphite brazed joint with reduced toxicity of the solder used.

1 cl, 7 dwg, 2 ex