一、前言振动消除应力(也称振动时效)与热时效、自然时效相比,具有节约能源、设备简单、周期短等优点。而且工艺效果好,工件尺寸稳定性比热时效和自然时效好,因此引起了国内外许多同志的关切。近年来,振动时效已逐渐被人们公认,也被众多的试验所证实。但由于内应力的现场无损测量还没有简单方便的方法,所以迄今振动时效在国内实际生产中的应用,尚未广泛开展。最近,我们与上海交通大学共同研制了压磁应力测量仪,使内应力现场无损测量得到了解决。本文扼要介绍一下磁性测定的原理、方法和效果。二、压磁应力测量仪目前国内评定振动时效的效果,一般是参照美国马丁公司采用的方法:工件若消除了应力,则共振频 First, the preface Vibration elimination stress (also known as vibration aging) Compared with thermal aging, natural aging, with energy saving, simple equipment, short cycle and so on. And the effect is good, the dimensional stability of the workpiece is better than the thermal aging and natural aging, which aroused the concern of many comrades at home and abroad. In recent years, vibration aging has gradually been recognized, but also by many experiments confirmed. However, as there is no simple and convenient method for the field nondestructive measurement of internal stress, so far the application of vibration aging in domestic actual production has not been carried out widely. Recently, we co-developed with Shanghai Jiao Tong University pressure magnetic stress measuring instrument, so that the internal stress field nondestructive measurement has been resolved. This article briefly describes the principle of magnetic determination, methods and effects. Second, the pressure magnetic stress gauge At present, the assessment of the effect of vibration aging, the general reference to the method used by the United States Martin company: If the workpiece to eliminate the stress, the resonance frequency