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研究了含0．12％～0．15％Ce的2090合金铸锭扩散退火工艺参数对合金元素在晶粒内部的分布、合金板材力学性能及强化相的分布与形态的影响。研究结果表明，对于2090－Ce合金铸锭，采用350℃×10h＋500℃×16b的均匀化处理，可使板材最终固溶时效后的强度提高；采用450℃×10h＋500℃×10h＋520℃×6h的均匀化处理，可使板材最终固溶时效后的断裂韧度及伸长率提高。第一段和第三段均匀化温度越高，合金板材的强度越低。第一段均匀化温度越高或第二段均匀化时间越长，组织中的β′相越粗大。扩散退火工艺对2090－Ce合金板材固溶时效后的强化相δ′及T1的形态与分布能产生间接的影响。降低第一段的均匀化温度，可使组织中获得细小的δ′／β′复合相，但使T1相分布和尺寸不均匀；较高的第一段均匀化温度和较长的第二段均匀化时间可使δ′／β′复合相中的δ′包复层分解成细小的颗粒状，并使T1相粗化；较高的第三段均匀化温度除使T1根粗化外，并促使其沿晶析出，同时使δ′相减少。
The effects of the diffusion annealing parameters of 2090 alloy ingot containing 0.12% ~ 0.15% Ce on the distribution of alloying elements in the grains, the mechanical properties of the alloy sheets and the distribution and morphology of the reinforcing phases were investigated. The results show that the strength of the 2090-Ce alloy ingot after 350 ℃ × 10h + 500 ℃ × 16b homogenization can improve the strength of the sheet after the final solution treatment; the average grain size of the 2090-Ce alloy ingot is uniform after 450 ℃ × 10h + 500 ℃ × 10h + 520 ℃ × 6h Treatment, can make the final plate after solution aging fracture toughness and elongation increased. The higher the homogenization temperature of the first and third sections, the lower the strength of the alloy sheet. The higher the homogenization temperature in the first section or the longer the homogenization time in the second section, the thicker the β ’phase in the tissue. The diffusion annealing process has an indirect effect on the morphology and distribution of the strengthening phases δ ’and T1 after solution aging of 2090-Ce alloy sheet. Lowering the homogenization temperature in the first stage can result in a small δ ’/ β’ phase in the microstructure, but the T1 phase distribution and size are not uniform. The higher first stage homogenization temperature and the longer second stage Homogenization time can make the δ ’/ β’ composite phase of the δ ’cladding layer decomposed into small particles, and the T1 phase coarsening; the higher the third phase of the homogenization temperature in addition to the T1 root coarsening, And promote its precipitation along the crystal, while the δ ’phase reduction.