本研究探討7075-T4鋁合金板在100oC、150oC、200oC溫熱狀態下的成形性能。試片採用電化學蝕刻法蝕刻網格後，經由油壓沖床進行板材可成形性試驗，並藉由變形後網格應變的量測，建立7075-T4鋁合金板在溫熱狀態下成形極限圖（Forming Limit Diagram, FLD）。結果表明，7075-T4鋁合金板成形極限受溫度的影響明顯，成形性能隨著溫度的上升而提升；在100oC~150oC時，鋁合金板對溫度變化最為敏感，成形性能幅度明顯提升。另外，本研究並透過氏硬度測試與微結構金相的觀察，加以探討各溫度成形性差異的原因，將成形性試驗結果做分析與驗證。;This study investigated the forming performance of 7075-T4 Aluminum alloy plate under the 100oC、150oC、200oC warm states. An experimental system of the electrical chemical etching method, hhydraulic presses for sheet metal formability tests, and deforming grids strain measurements are used to carry out the 7075-T4 aluminum alloy sheet forming limit diagram in a hot state (Forming Limit Diagram, FLD). Results show that the7075-T4 aluminum alloy sheet forming limit temperature obviously affects, and the formability rises apparently as temperatures rise, and at 100oC~150oc aluminum alloy sheet is most sensitive to temperature changes and the forming performance improves significantly. In addition, based on the Vickers hardness tests and metallographic observation of micro-structure, this study investigated the causes of formability differences as the temperature, and then established formability analysis and verification of test results.
