鋁單板在(zai)軋(ya)制時會產生變(bian)形(xing)區(qu)，變(bian)形(xing)區(qu)是影(ying)響到(dao)鋁單(dan)板軋(ya)制質量(liang)(liang)的(de)重要(yao)(yao)因素之一(yi)，在(zai)鋁單(dan)板軋(ya)制流(liu)程中(zhong)有(you)(you)著十(shi)分(fen)重要(yao)(yao)的(de)地位，要(yao)(yao)想(xiang)控(kong)制鋁單(dan)板成品的(de)質量(liang)(liang)，對該變(bian)形(xing)區(qu)的(de)研究是十(shi)分(fen)有(you)(you)必(bi)要(yao)(yao)的(de)。

    鋁(lv)(lv)單(dan)板在(zai)軋(ya)制(zhi)變(bian)形(xing)(xing)(xing)(xing)(xing)(xing)區(qu)(qu)(qu)的(de)(de)(de)研(yan)究(jiu)是建(jian)立在(zai)實驗(yan)研(yan)究(jiu)上的(de)(de)(de)。大量(liang)的(de)(de)(de)實驗(yan)研(yan)究(jiu)和理論分(fen)(fen)析表(biao)明(ming)，鋁(lv)(lv)單(dan)板軋(ya)制(zhi)變(bian)形(xing)(xing)(xing)(xing)(xing)(xing)區(qu)(qu)(qu)內金屬的(de)(de)(de)流動和變(bian)形(xing)(xing)(xing)(xing)(xing)(xing)是不(bu)均勻(yun)的(de)(de)(de)。圖(tu)3-9 所示為(wei)鋁(lv)(lv)單(dan)板軋(ya)件通過(guo)變(bian)形(xing)(xing)(xing)(xing)(xing)(xing)區(qu)(qu)(qu)各垂直(zhi)橫斷面(mian)的(de)(de)(de)金屬質點水平流速沿(yan)高(gao)(gao)向(xiang)的(de)(de)(de)不(bu)均勻(yun)分(fen)(fen)布情形(xing)(xing)(xing)(xing)(xing)(xing)，據(ju)此，常將軋(ya)制(zhi)變(bian)形(xing)(xing)(xing)(xing)(xing)(xing)區(qu)(qu)(qu)劃(hua)分(fen)(fen)成四個小區(qu)(qu)(qu)域（見(jian)圖(tu)3-10）： I 區(qu)(qu)(qu)內幾乎沒(mei)有發生(sheng)塑性變(bian)形(xing)(xing)(xing)(xing)(xing)(xing)，  稱為(wei)難變(bian)形(xing)(xing)(xing)(xing)(xing)(xing)區(qu)(qu)(qu)，II區(qu)(qu)(qu)為(wei)主要(yao)變(bian)形(xing)(xing)(xing)(xing)(xing)(xing)區(qu)(qu)(qu)，易于(yu)發生(sheng)高(gao)(gao)向(xiang)的(de)(de)(de)壓縮和縱向(xiang)（軋(ya)向(xiang)）的(de)(de)(de)延(yan)伸(shen)變(bian)形(xing)(xing)(xing)(xing)(xing)(xing)，III區(qu)(qu)(qu)和IV區(qu)(qu)(qu)由于(yu)受到前、后剛端反作用(yong)力作用(yong)所致，產生(sheng)了一定的(de)(de)(de)縱向(xiang)壓縮和高(gao)(gao)向(xiang)變(bian)厚變(bian)形(xing)(xing)(xing)(xing)(xing)(xing)。