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Abstract：
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The principle of warm hydroforming was introduced.The formability of tube blanks of Mg-alloy and Al-alloy was tested.A Mg-alloy part with various cross sections and an Al-alloy tubular part with various diameters were manufactured.A warm hydroforming device with the highest medium temperature of 315 ℃ and the maximum pressure of 100 MPa was set up,which was capable of transmitting and sealing warm medium at high pressure,and controlling tube temperature and loading path.Testing and analysis on the formability of Mg-alloy and Al-alloy at various temperatures indicate that the effects of temperature on total elongation, uniform elongation and work-hardening-coefficient should be considered comprehensively to determine a proper forming temperature range.
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Funds：
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国家杰出青年基金项目(50325516);;
国家科技支撑计划资助项目(No.2006BAE04B03)
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AuthorIntro：
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Reference：
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[1]苑世剑,王小松.内高压成形机理及应用[J].机械工程学报,2002,38(增刊):12-15.
[2]Vollertsen F.Hydroforming of aluminum alloys using heatedoil[A].9th International Conference on Sheet Metal[C].Leuven,2001.
[3]Geiger M,Merklein M,Hecht J.Warm hydroforming ofmagnesium sheet-results and microstructural changes[A].Advanced Technology of Plasticity[C].Italy,2005.
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[6]齐军,何祝斌,苑世剑.铝合金管材热态内高压成形研究[J].航空材料学报,2006,26(3):99-104.
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