本刊1974年第5期刊登了“铸件振动时效的特点”一文,许多读者向本刊编辑部提出想进一步了解情况,现请高鹰同志综合答复如下: 西欧一些国家(如西德、英国、瑞士等)于五十年代在生产上应用了振动时效,但多用高频率和长时间振动,其消除残余应力和提高尺寸稳定性的效果不明显,因此? The 5th Issue, Issue 5, 1974, published the article “Characteristics of Casting Vibration Aging”. Many readers suggested to the editorial department of this magazine that they would like to know more about the situation. Now, please give a general reply from Comrade Gao Ying as follows: Some countries in Western Europe such as West Germany, Switzerland, etc.) applied to the production of vibration aging in the fifties, but the use of high frequency and prolonged vibration, the effect of eliminating residual stress and improving dimensional stability is not obvious, therefore?