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基于加工圖的7085鋁合金熱成形性能研究
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國家重點基礎研究計劃資助項目（2010CB731701）；國家重點基礎研究計劃資助項目（2012CB619502）；國家科技支撐計劃（2007BAE38B06）


Hot Formability of 7085 Aluminum Alloy Based on Processing Map
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    摘要:

    針對7085鋁合金航空構件的熱加工工藝問題，對7085鋁合金在300~450 ℃和0.0001~1 s-1條件下進行等溫壓縮實驗，建立了7085鋁合金熱加工圖并且分析了7085鋁合金熱成形性。結果表明：溫度340~450 ℃、應變速率0.0001~1 s-1為加工安全區(qū)；失穩(wěn)區(qū)域為溫度300~340 ℃、應變速率0.01~1 s-1，在此區(qū)域加工時，形成絕熱剪切帶且?guī)?nèi)組織為劇烈拉長晶粒；潛在危險加工區(qū)域為溫度300~340 ℃、應變速率0.0001~0.01 s-1；建議在溫度340~410 ℃、應變速率0.0004~1 s-1選擇工藝參數(shù)。

    Abstract:

    Based on the heat processing technology of 7085 aluminum alloy aircraft parts, 7085 aluminum alloy in the temperature range of 300~450 °C and strain rate range of 0.0001~1 s-1 have been studied by hot compressing testing. Processing map of 7085 aluminum alloy was generated and hot formability was analyzed. The results demonstrate that the temperature range of 340~450 °C and strain rate range of 0.0001~1 s-1 is the processing safety area for hot deformation of the 7085 aluminum alloy. The flow instability region occurs in the temperature range from 300 °C to 340 °C and strain rate range from 0.01 s-1 to 1 s-1. The adiabatic shear bands are generated when 7085 aluminum alloy is deformed in the flow instability region. The structure of adiabatic shear banding is violently elongated grain. The potential processing dangerous area is in the temperature range from 300 °C to 340 °C and strain rate range from 0.0001 s-1 to 0.01 s-1. The optimal deformation processing parameters are the deformation temperatures ranging from 340 °C to 410°C and strain rates ranging from 0.0004 s-1 to 1 s-1.

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陳學海,陳康華,董朋軒,彭國勝,梁 信.基于加工圖的7085鋁合金熱成形性能研究[J].稀有金屬材料與工程,2013,42(2):273~277.[Chen Xuehai, Chen Kanghua, Dong Pengxuan, Peng Guosheng, Liang Xin. Hot Formability of 7085 Aluminum Alloy Based on Processing Map[J]. Rare Metal Materials and Engineering,2013,42(2):273~277.]
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  • 收稿日期:2012-02-12
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