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純鉬板材真空環(huán)境高溫拉深性能研究
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High-temperature Deep Drawability of Pure Molybdenum Sheet in Vacuum Environment
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    摘要:

    在25~870 ℃溫度范圍內(nèi)進(jìn)行了厚度為2.0 mm純鉬板的單向拉伸試驗(yàn)，建立了高溫拉深有限元分析模型。通過數(shù)值模擬與試驗(yàn)對比分析，確定了純鉬板高溫變形摩擦與溫度的關(guān)系，研究了成形溫度、潤滑、壓邊間隙和模具尺寸對熱拉深工藝的影響，并采用優(yōu)化的工藝參數(shù)進(jìn)行了平底杯形沖頭熱拉深試驗(yàn)。結(jié)果表明，潤滑條件對純鉬板熱拉深影響最顯著，其次是成形溫度；在成形溫度870 ℃，拉深速度30 mm/min，有潤滑，壓邊間隙2.5 mm的參數(shù)組合下，最大拉深比可達(dá)1.94

    Abstract:

    Uniaxial tensile tests for pure molybdenum sheets with thickness of 2.0 mm were conducted in a temperature range between 25 and 870 °C, and the finite element model for hot deep drawing of molybdenum plate was established. Based on the contrastive analysis of FEM and experiments, the relationship between friction coefficient and temperature was confirmed, and the effects of forming temperatures, lubricating conditions, blank-holder gap and die dimensions on deep drawing process were investigated, and then the vacuum hot deep drawing tests were carried out with optimized process parameters. The results indicate that lubrication has the most prominent effect on the deep-drawing process, followed by the forming temperature. The limiting drawing ratio can be raised up to 1.94 with the optimum parameters including forming temperature 870 °C, drawing speed 30 mm/min and blank-holder gap 2.5 mm under lubricated condition

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孟 寶,萬 敏,吳向東,周應(yīng)科,彭靜文,蔣 政.純鉬板材真空環(huán)境高溫拉深性能研究[J].稀有金屬材料與工程,2015,44(6):1385~1390.[Meng Bao, Wan Min, Wu Xiangdong, Zhou Yingke, Peng Jingwen, Jiang Zheng. High-temperature Deep Drawability of Pure Molybdenum Sheet in Vacuum Environment[J]. Rare Metal Materials and Engineering,2015,44(6):1385~1390.]
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  • 收稿日期:2014-06-20
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  • 在線發(fā)布日期: 2016-01-04
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