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首页> 外文期刊>日本マリンエンジニアリング学会誌 >Effect of HIP treatment on the shrinkage cavity of FCD material
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Effect of HIP treatment on the shrinkage cavity of FCD material

机译：髋关节处理对FCD材料收缩腔的影响

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摘要

As the material defect might be included in the present FCD (spheroidal graphite cast iron) mono-block piston, material defect should be taken into account for designing the piston. If this defect could be removed by the HIP (Hot Isostatic Pressing) processing, the optimal design could be performed on condition of non-defect. Namely, it enables to design a lower weight and higher power engine. In this research, we have at first confirmed whether the defect is able to be eliminated by performing HIP processing to the specimen in which defects existed. Then, we have confirmed the influence of HIP processing on the strength by comparing with the specimen of healthy part. Consequently, it turned out that the defect can be eliminated when the defect locates at the inside of material. Although the cavity is eliminated in the crushed part of shrinkage cavity, the flake of the graphite remained there. Though the tensile strength can be improved considerably by eliminating the defect, it can not be improved up to the strength of a non-defect part due to the influence of the flake of graphite.
机译：由于材料缺陷可能包括在本FCD（球形石墨铸铁）单块活塞中，应考虑到设计活塞来考虑材料缺陷。如果通过髋关节（热等静压）处理可以去除该缺陷，则可以在非缺陷的条件下进行最佳设计。即，它可以设计较低的重量和更高的电力发动机。在该研究中，我们首先确认了通过对存在缺陷的样本来执行髋部处理是否能够消除缺陷。然后，通过与健康部分标本相比，我们已经证实了髋关节处理对强度的影响。因此，事实证明，当缺陷位于材料内部时，可以消除缺陷。尽管在收缩腔的压碎部分中被消除了腔，但是石墨的薄片仍然存在。尽管通过消除缺陷可以显着提高拉伸强度，但由于石墨的薄片的影响，它不能提高不缺陷部分的强度。

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