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采用喷射沉积及原位反应喷射沉积方法制备7093铝合金及7093+TiC铝合金,研究试验合金420℃热挤压及不同固溶处理后的微观组织和力学性能。探索原位TiC颗粒对喷射沉积7093铝合金组织的影响。结果表明,原位TiC颗粒能够提高喷射沉积7093铝合金的再结晶温度10℃,当固溶温度达到490℃时,7093+TiC铝合金中的富Cu颗粒基本溶解,但并未出现过烧现象。采用450℃×3h+480℃×3h+120℃×24h的制度处理后,7093+TiC铝合金的抗拉强度达754 MPa,伸长率达7.1%。
The 7093 aluminum alloy and 7093 + TiC aluminum alloy were prepared by spray deposition and in situ reactive spray deposition. The microstructure and mechanical properties of the alloy after hot extrusion at 420 ℃ and different solution treatment were studied. The effect of in situ TiC particles on the microstructure of spray deposited 7093 aluminum alloy was explored. The results show that in-situ TiC particles can increase the recrystallization temperature of spray-deposited 7093 aluminum alloy by 10 ℃. When the solution temperature reaches 490 ℃, the Cu-rich particles in 7093 + TiC aluminum alloy are basically dissolved, but no over-burning phenomenon occurs . The tensile strength of 7093 + TiC aluminum alloy reached 754 MPa and the elongation reached 7.1% after treated with 450 ℃ × 3h + 480 ℃ × 3h + 120 ℃ × 24h.