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已往的研究结果指出,高碳和低碳马氏体在回火分解过程中分别在130℃和150℃出现一个内耗峯。本文根据内耗峯的出现和消逝的条件,较有系统地研究了高碳和低碳马氏体的回火分解和分解产物的形成和破坏,从而指出了这内耗峯确与分解产物与母体的共格性有密切联系。 研究结果指出,无论在高碳或低碳马氏体的情形,这个内耗峯(内耗表示为温度的函数)的位置并不随测量频率的改变而改变,内耗峯的高度随着测量内耗时的应变振幅的增大而升高。这说明内耗峯并不是由于一种弛豫过程所引起的,这可能是所有的共格性内耗峯的一个特点。根据这一特点,认为内耗峯可能是由于共格界面在应力感生下的移动所引起来的。对于产生内耗峯的机构提出了初步看法。
Previous studies have shown that high-carbon and low-carbon martensites exhibit a friction peak at 130 ° C and 150 ° C respectively during tempering. According to the occurrence and disappearance of internal friction peaks, the formation and destruction of tempering decomposition and decomposition products of high-carbon and low-carbon martensite are systematically studied in this paper. The results show that the internal friction peaks and decomposition products and the parent Cohesion is closely linked. The results indicate that the location of this internal friction peak (a function of temperature as a function of temperature) does not change with the measurement frequency, either in the case of high-carbon or low-carbon martensite. The height of the internal friction peak varies with time- Amplitude increases and increases. This shows that the internal friction peak is not due to a relaxation process, which may be a feature of all the coherent internal friction peaks. According to this characteristic, it is considered that the internal friction peak may be caused by the movement of the coherent interface under the stress induced. A preliminary view is given of the mechanism that generates the internal friction peak.