一、前言由于锡磷青铜具有良好的弹性和可焊性、高的耐磨性和抗磁性以及较佳的冷热加工性能,而且价格又便宜,因而在无线电和电器工业中,被广泛用于制造各种高导磁性的弹性元件。我厂在解决某产品开关片的使用寿命问题时,根据文献提供的方法,采用220℃加热,1小时保温的退火工艺,其结果不甚理想,塑性虽有提高,弹性却降低了,经过一万次的寿命试验,接触部分发生微小张口变形,接触电阻增大,其性能比未经退火的原始状态还差。当时我们怀疑测温系统有故 I. Preface Due to its good flexibility and solderability, high wear resistance and anti-magnetic properties, as well as better hot and cold processing properties, and its low price, tin-phosphor bronze is widely used in the radio and electric appliance industries Manufacture a variety of high permeability of the elastic components. I plant to solve the problem of service life of a product switch piece, according to the method provided by the literature, the use of 220 ℃ heating, 1 hour thermal annealing process, the result is not satisfactory, although the plasticity increases, the flexibility is reduced, after a Ten thousand times the life test, the contact part of a small mouth deformation occurs, the contact resistance increases, its performance than the original state without annealing even worse. At that time, we suspect that the temperature measurement system is wrong