Shenzhen Su's heat treatment and compound modification processing of Zr and Ti on the microstructure of ZA27 alloy obtained three conclusions
(1) the phase structure of titanium and zirconium compound modification does not change the ZA27 alloy, but the as cast microstructure of ZA27 alloy in primary α phase from coarse dendritic developed into small petals dendrite
(2) 370 ℃× 10h solid solution treatment can completely eliminate the microstructure of ZA27 alloy before and after modification of eutectic structure and compound modification, beneficial to the solution heat treatment phase distribution.
(3) morphology of 320 ℃× 3H annealing treatment can not change the metamorphism and metamorphic after cast of primary α phase, but the eutectic and ε phase compound coarse, granular tiny η precipitates alpha in dendrite. Modification treatment significantly inhibited the eutectic microstructure coarsening effect. 320 ℃× 18h after annealing treatment, change before modification organization to alpha phase matrix, the grain boundary on the distribution of thick stripe phase of two phases, after modification of the organization retains morphology petaloid alpha dendritic crystal, eutectic η gathered up the coarse lamella
The above is just Shenzhen sushi heat treatment processing exploration to the conclusion the heat treatment processing, welcome colleagues came to visit, guidance. Common development, and common progress.