METHOD OF MACHINING PART BLANKS MADE FROM REFRACTORY NICKEL ALLOYS PRIOR TO JOINTING THEM BY SOLDERING-WELDING Russian patent published in 2012 - IPC B23K31/02 B23K1/00 

FIELD: process engineering.

SUBSTANCE: invention relates to machine building, particularly to machining parts from refractory nickel alloys operated at -253°C to +900°C.Proposed method comprises isothermal deformation of part in two passes. At first step, billets are deformed at 0.5-0.7 T_m at deformation rate έ from 2×10^-3 s^-1 to 10×10^-3 s^-1 and deformation degree ε of 20 to 90%, while, at second step, billets are deformed at 0.5-0.7 T_m at deformation rate έ from 2×10^-3 s^-1 to 10×10^-3 s^-1 and deformation degree ε of 20-90%. After every pass, billets are cooled down from deformation temperature to 500-600°C and, then, in air.

EFFECT: decreased probability of crack formation, higher strength and durability, longer life.

2 cl