纯铁中磷的高温内耗研究

采用含有不同含量磷的电子轰击纯铁作样品,经脱碳脱氮后,用低频倒扭摆测量其300—800℃之间的内耗值。结果表明,磷含量在0.007—0.28wt%之间的五根样品,分别于580℃和470℃左右出现两个内耗峰,激活能分别为2.13ev和1.80ev。经高温保温一定时期淬火处理后,这两个峰全部消失。由此看出,580℃左右的峰可能是Fe—p的ss峰,而470℃的峰可能是纯铁的PM峰。
本文还研究了一根含稀土元素铈的铁磷合金的内耗。发现在703℃、601℃和500℃相应出现三个内耗峰。初步认为,它们分别是Fe—Ce的ss峰、Fe—P的ss峰和纯铁的PM峰。

The Research of an Internal Friction of the Pure Iron Containing Phosphorus at High Temperature

Five kinds of specimens of the Pure iron containing phosphorus were used in this work. After having removed carbon and nitrogen,we measured internal friction of these specimens at a temperature range from 300℃ to 800℃ with the inverted torsion Pendulum at low freguency·Consqu ently five specimens containing phosphorus contents at a range from 0.007 wt% to 0.28wt% show two internal friction peaks at about 580℃ and about 470℃ respectively. The activation energy of this peak at about 580℃ is 2.13ev,the another is 1·80ev. After quenching at high temPeratur e,two Peaks disappeared. Based on the results mentioned above,the Peak at about 580℃ is likely the Fe-P Peak (SS Peak) and the another is Probably the Pure iron Peak (PMPeak).
Finally,the specimen of Fe-Ce-P alloy containing a small amount of rare earth element Ce was made a experiment. Three Peaks were found at about 703℃,601℃ and 500℃ respectively. We have a tentative idea that these three peaks are the Fe-Ce SS peak,the Fe-P SS peak and the Pure iron peak (PM peak) respectively. It is remarkable that the PM peak temperature in the Fe-Ce-P alloy is higher than that one in the Fe-P alloy. The work,which a small amount rare earth element affects the internal friction of Fe-P alloys,is being perfected.