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4. The optimal value of the liquid fraction is found to exist within the range of the experimental conditions.Compression holding time is suggested to have values as large as possible to improve the quality of the final products. This result means that the compression holding time has a positive and a negative correlation on the hardness average and the standard deviation of the hardness, respectively.
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摘要制造的半固态成形的汽车和飞机工业的许多产品是时下越来越多，从环境和经济的观点。特别是在汽车工业中，升级的引擎的能力和减少发动机的重量，
全铝发动机活塞已经开发的研究人员和工业技术。目前，成型方法制造发动机活塞铸造，挤压铸造，热锻造。然而，这些方法中，包括几个铸造缺陷，以及需要后加工。在本研究中，将通过以下来制造铝发动机活塞thixoforging根据成形变量。此外，它是非常重要的，形成的最终产品上的变量thixoforging找到的效果。为了确定的效果，然而，研究人员和工业
技术人员依靠许多试验。在这项研究中，统计方法thixoforging已经被采纳，提高实验效率。形成初始固相分数的变量，如，模具温度和保温时间压缩被认为是制造铝合金发动机活塞的thixoforging。硬度和 毕业论文
微观结构表征，可以找到最佳的成型条件的统计方法进行。全铝发动机活塞的统计方法的最佳工艺条件下进行的实验。
关键词Thixoforging。铝的汽车活塞。响应面分析。遗传算法。神经网络的决策者