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Abstract：
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Powder forging is a new-type and high-performance plastic forming technology.But,there is still no a perfect universal theory of powder forging because of its deforming particularity at present.The deformation and densification laws of upsetting are researched based on experimental results of powder forging of deoxidize Fe porous material at the different initial conditions which include friction factor,relative height and relative density.The local strain limit criterion for the cracking on surface and the correlative curve have been achieved followed by the specialized analysis for the effect of friction factor,relative height and relative density on cracking strain limitation.The limit process parameters are confirmed for the cracking limitation based on experimental results of powder forging.With experimental results,the design of mould and powder forging preformed blank can be optimized and the valuable data from experiment establishes the foundation for the optimization of technological parameters,too.
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Funds：
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国家自然科学基金研究项目(50175086)
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AuthorIntro：
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Reference：
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