(1. 哈爾濱理工大學(xué) 材料科學(xué)與工程學(xué)院，哈爾濱 150040；
2. 哈爾濱工業(yè)大學(xué) 材料科學(xué)與工程學(xué)院，哈爾濱 150001)
摘 要: 為了揭示鍛件預(yù)制坯中方環(huán)件壓縮變形的機(jī)理，采用有限元模擬及試驗(yàn)，對7075鋁合金方環(huán)件壓縮過程進(jìn)行分析，研究工藝條件對方環(huán)件壓縮變形流動(dòng)行為的影響規(guī)律。結(jié)果表明：隨著方環(huán)件高度的增大，壓縮變形不均勻性明顯增大，金屬沿徑向外流量顯著增多，且壓縮變形后金屬變形行為的復(fù)雜程度也隨之增大。通過工藝實(shí)驗(yàn)進(jìn)行了驗(yàn)證，所得與模擬結(jié)果吻合較好，為復(fù)雜鍛件預(yù)制坯工藝的制定提供了理論依據(jù)。
關(guān)鍵字: 鋁合金；方環(huán)件；壓縮；數(shù)值模擬
aluminium alloy square ring
（1. College of Materials Science and Engineering, Harbin University of Science and Technology,
Harbin 150040, China;
2. School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China）
Abstract:In order to reveal the mechanism of the square ring compression of the pre-forging billet. The numerical simulation and experiment were employed to analyze the compression of square ring with 7075 aluminium alloy. The effect of deformation condition on the metal flow behaviour of aluminium alloy during the square ring compression was analyzed. The results show that with increasing the height-diameter ratio, the uniformity of deformation increases markedly, the metal outside flow along the radial increases significantly, and the complex degree of metal flow behavior also increases evidently. The results agree well with one of the numerical simulation. This provides a theoretical reference for the investigation of pre-fabricated billet technology.
Key words: aluminium alloy; square ring; compression; numerical simulation
