论文部分内容阅读
一、前言恒弹性合金具有一系列优良的特性,其中最突出的是具有特别低的频率温度系数和高的机械品质因数。最常见的牌号是:Ni42CrTiAl(即3j53)、Ni43CrTiAl(即3j58)及Ni44CrTiAl等。它目前己广泛应用于通讯技术中的机械滤波器、谐振器、金属延迟线、手表游丝及精密仪器、仪表等器件。近年来,由于通迅技术的不断发展,恒弹性合金的发展异常迅猛。弹性合金物理性能测试与研究也给予了应有的重视,取得了一定的进展。最初只能测其合金的杨氏模量,现己发展能测合金的频率温度系数、模量温度系数、机械品质因数和传播速度等物理参数了。大量研究表明:恒弹性合金在纵振下与在扭振下的性能是不相同的;同时,
I. Preface Constant elastic alloys have a series of excellent characteristics, the most prominent of which is the particularly low frequency temperature coefficient and high mechanical quality factor. The most common grades are: Ni42CrTiAl (ie 3j53), Ni43CrTiAl (ie 3j58) and Ni44CrTiAl and so on. It is now widely used in communications technology, mechanical filters, resonators, metal delay line, watch springs and precision instruments, instruments and other devices. In recent years, due to the continuous development of communication technology, the development of constant elastic alloy is extremely rapid. Elastic alloy physical properties of the test and research also gave due attention, and made some progress. Initially only the Young’s modulus of the alloy can be measured. Now it has been developed to test the physical properties of the alloy such as frequency temperature coefficient, modulus temperature coefficient, mechanical quality factor and propagation velocity. Numerous studies show that the properties of the permanent elastic alloy under longitudinal vibration and torsional vibration are not the same; at the same time,