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鈦合金薄壁零件數(shù)控熱拉伸蠕變復合成形研究進展
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國家自然科學基金資助項目(51175022);航空科學基金資助項目(2010ZE51050);總裝預研資助項目(51318040315)


State of the Art of Hot Stretch-creep Compound Forming for Thin-wall Titanium Alloy Components
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    摘要:

    數(shù)控熱拉伸蠕變復合成形是一種精確成形鈦合金薄壁零件的新技術。該技術采用自阻加熱等加熱方法將先進輕質(zhì)鈦合金薄壁板材或型材坯料加熱至熱成形溫度后進行數(shù)控熱拉伸彎曲成形,然后適量補拉工件,接著在保溫階段保持工件貼模使材料蠕變,工件內(nèi)應力發(fā)生在線松弛,從而達到減小回彈,提高零件成形精度的目的。系統(tǒng)介紹了鈦合金薄壁零件數(shù)控熱拉伸蠕變復合成形新技術的研究現(xiàn)狀、工藝原理、關鍵裝備、工藝技術及其優(yōu)缺點,并指出了這種新技術的未來應用前景

    Abstract:

    Hot stretch-creep process is a novel compound forming approach for thin-wall titanium alloy components. In this process, a thin-wall stock of metal sheet or profile is stretched and bended after heating to the hot forming temperature via the heating methods such as resistance heating. When the finial configuration is formed, the temperature remains and the material creeps along stretch direction based on the mold surface. This leads to the internal stress decrease in the formed workpiece and a stress relaxation on-line. Then the springback of the component is reduced due to the decrease of the residual stress and the forming precision is improved. The research status, process principle, key equipment, processing technology, and the merits/demerits of the new process and technology were introduced. Finally, the applications of hot stretch-creep compound forming technology in future are proposed

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肖軍杰,李東升,李小強,金朝海,鄧同生.鈦合金薄壁零件數(shù)控熱拉伸蠕變復合成形研究進展[J].稀有金屬材料與工程,2013,42(12):2629~2635.[Xiao Junjie, Li Dongsheng, Li Xiaoqiang, Jin Chaohai, Deng Tongsheng. State of the Art of Hot Stretch-creep Compound Forming for Thin-wall Titanium Alloy Components[J]. Rare Metal Materials and Engineering,2013,42(12):2629~2635.]
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  • 收稿日期:2012-12-02
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