Abstract: Effects of solution treatment temperature (1030-1190 ℃), aging temperature (460-530 ℃), and holding time (0.5-2 h) on the microstructure of N03360 Ni-Be alloy with Ti addition were studied by optical microscope and microhardness tester. The results show that the grain size of the N03360 alloy tends to increase when the solution treatment temperature exceeds 1100 ℃. When the temperature exceeds 1170 ℃, it will cause overburning, local grain boundary melting and NiBe compounds agglomeration. The rich-Be phase generated during the discontinuous precipitation process of the N03360 alloy at the grain boundaries will reduce the hardness. The higher the solution treatment temperature is, the more violent the discontinuous dissolving process will be. If the aging temperature is too high or the holding time is too long, the discontinuous dissolving process at the grain boundaries of the N03360 alloy will be out of control.

Key words: N03360 alloy, discontinuous dissolving, rich-Be phase, solution treatment, aging, overburning