摘要
研究了变形及在 150—600℃温度区时效的工业纯铁及加稀土工业纯铁的室温至 400℃的内耗。发现稀土对试验铁的 Snoek 峰和 Snoek-Ke-Koster(简称SKK)峰,有强烈的影响,使变形及在 450℃以下温度时效铁的背景内耗增高,并在 Snoek 峰和 SKK 峰之间出现一附加的内耗峰。结果表明:时效过程中试验铁的内耗变化,主要取决于C-N 化合物析出或溶解引起的位错段长度L_0的改变;稀土对内耗的影响则归因于它能够加速铁中C-N化合物脱溶及使C-N化合物稳定化。
The internal friction of the commercial pure iron with and without rare earthwas studied after deformation and ageing at a temperature range from 150℃to 600℃. It was found that the rare earth has a strong effect on Snoek peakand Snoek-Ke-Koster (referred to as 'SKK' hereinafter) peak, and causesan enhancement of background internal friction in the iron deformed andaged below 450℃ and an additional peak between Snoek and SKK peaks. Theresults indicate that the variation of internal friction of iron specimenmainly depends on the change of dislocation segment length L_0 resulting fromC-N compound precipitation and dissolution during ageing. The reason whythe rare earth has an effect on internal friction is attributed to the accele-ration of C,N precipilations and stabilization of C-N compound.
基金
冶金工业部基金
关键词
内耗
铁
稀土
变形
时效
iron
rare earthv
internal friction
deformation
ageing
