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Abstract：
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When producing heavy platen-shaped forgings with conventional forging processes, due to the aspect features of the said forgings, it is difficult to meet the requirements that anvil-width ratio and blank-width ratio should be big enough to prevent tensile stress when the forgings are compressed in the height direction. Therefore, cracks tend to germinate at the crystal borders and brittle parts in the deformation bodies. The viewpoint is testified by dissecting experiment of two-piece platen-shaped forgings failing in the supersonic inspection. To overcome the shortcomings of the conventional forgings process, the paper proposes the optimal forging technology, namely, New FM Forging Method, for heavy platen-shaped forgings, based on the current research achievements. The new FM Forging Method with suitable processes parameters can be used to guaranty the mechanism that cracks do not germinate in the deformation bodies. It is verified by production practice that the new FM Forging Method can produce the mechanism and decrease greatly the reject ratio of heavy platen-shaped forgings. The technology can be applied for the production and recovery of heavy forgings effectively and expects to be applied widely.
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Reference：
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[1]刘助柏.塑性成形新技术及其力学原理[M].北京:机械工业出版社,1995.
[2]刘助柏,李纬民.新FM锻造法[J].机械工程学报,1994,30(4):7982.
[3]LiuZhubai.Theoryofstretchingablankwithrectangular crosssectionbetweenflattools[C].The12thIFM.Chicago,1994.
[4]孙海燕.大型锻件内部缺陷的修复研究[J].大型铸锻件,2003,(3):68,15.
[5]梁晨.大型模块锻造工艺模拟与CAPP专家系统研究[D]:[博士学位论文].秦皇岛:燕山大学,2003
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