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Ti-6Al-4V合金雙半球結(jié)構(gòu)脈沖電流輔助超塑成形
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中央高?；究蒲袠I(yè)務(wù)費(fèi)專項(xiàng)資金資助 (HIT.KLOF.2010039)


Pulse Current Auxiliary Superplastic Forming of Ti-6Al-4V Alloy Double Hemisphere Structure
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    摘要:

    針對Ti-6Al-4V合金板材超塑成形能耗高、效率低的問題，提出了一種脈沖電流輔助超塑成形工藝。該工藝將成形坯料直接串聯(lián)到脈沖電流回路，利用脈沖電流迅速將坯料加熱至超塑成形溫度。通過脈沖電流加熱實(shí)驗(yàn)，分析了平均脈沖電流密度對坯料溫度及升溫速率的影響。結(jié)果表明，采用該加熱方式可將坯料加熱時(shí)間從數(shù)十分鐘縮短至幾十秒，能量消耗降至傳統(tǒng)工藝的20%左右，極大地提高了加熱效率、降低了能耗，實(shí)現(xiàn)了節(jié)能環(huán)保的綠色超塑成形技術(shù)。利用該工藝成形了Ti-6Al-4V合金雙半球結(jié)構(gòu)，并分析了在脈沖電流輔助工藝條件下細(xì)晶態(tài)Ti-6Al-4V合金的超塑變形機(jī)制

    Abstract:

    A pulse current auxiliary superplastic forming (PCASF) is developed to solve the problems of high energy consumption and low efficiency of Ti-6Al-4V alloy superplastic forming. In this process, the sheet was connected in series with a pulse current circuit and heated directly by the pulse current. Through the pulse current heating experiment, the effects of the average current density on the temperature and the rate of temperature rise have been studied. The result indicates that the heating time is reduced from tens of minutes to dozens of seconds, and the energy consumption is reduced to 20% compared to the traditional process. Thus the heating efficiency is improved and the energy consumption is reduced greatly. The green superplastic forming technology with the merit of energy conservation becomes possible. The double hemisphere structure of Ti-6Al-4V alloy has been formed by PCASF and its deformation mechanism has been studied

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李 超,張凱鋒,蔣少松. Ti-6Al-4V合金雙半球結(jié)構(gòu)脈沖電流輔助超塑成形[J].稀有金屬材料與工程,2012,41(8):1400~1404.[Li Chao, Zhang Kaifeng, Jiang Shaosong. Pulse Current Auxiliary Superplastic Forming of Ti-6Al-4V Alloy Double Hemisphere Structure[J]. Rare Metal Materials and Engineering,2012,41(8):1400~1404.]
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  • 收稿日期:2011-08-09
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