板坯頭/尾部平面形狀對(duì)鋁合金厚板粗軋頭尾切除量的影響

板坯頭/尾部平面形狀對(duì)鋁合金厚板粗軋頭尾切除量的影響Effects of head and end plane shape of slab on metal removal of head and tail in aluminum alloy plate rough rolling

為降低鋁合金厚板粗軋頭尾切除量，提高熱軋鋁板成材率，以5052鋁合金材料為對(duì)象，基于DEFORM商用軟件，利用剛塑性有限元方法模擬板厚和壓下量對(duì)頭尾鼓形深度的影響規(guī)律，建立頭尾切除量定量預(yù)測(cè)模型。以此為基礎(chǔ)，開展多道次可逆軋制過程中頭/尾部普通平面、圓弧平面、梯形平面下的軋件頭尾切除量演變規(guī)律探究，結(jié)果表明：圓弧平面與梯形平面能減少頭尾切損約18%~20%。普通平面的頭尾切除量預(yù)測(cè)模型已應(yīng)用于實(shí)際軋制規(guī)程，預(yù)測(cè)結(jié)果和現(xiàn)場(chǎng)實(shí)測(cè)情況吻合，驗(yàn)證了有限元模擬結(jié)果的正確性。綜合考慮鑄錠的端面銑削工藝，梯形平面更有利于現(xiàn)有鋁合金厚板熱軋生產(chǎn)。

In order to reduce the metal removal of head and tail and improve the hot rolled aluminum plate yield, taking 5052 aluminum alloy as an object, the effects of strip thickness and rolling reduction on metal removal of head and tail were simulated and the prediction model of head and tail was precisely established. Then the head and tail evolution rules were studied under the conditions of general plane shape, circular plane shape and trapezoidal plane shape of the slab head and end in the process of multi pass reversing rolling. The results show that the cropping is reduced by 18%-20% under the condition of circular and trapezoidal cross-section. In order to testify the correctness of finite element simulation results, the prediction model of head and tail under the condition of general plane shape is applied to the actual rolling schedule, and the prediction results are consistent with the in-site measurement data. Considering the milling process of ingot end face, the trapezoidal plane shape is more suitable for the hot rolling production of aluminum alloy thick plate at this stage.

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