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随着精密弹性材料及冶金技术的发展,目前我国0.5级以上电表、小型扇形表、地震仪等特殊仪器仪表大多数采用张吊丝支承。张丝是仪表的关键元件。而张丝质量的好坏又取决于材质的优劣和合理的加工工艺。因此,张丝的材料必须满足以下技术要求:(1)具有较高的机械强度,要求抗拉强度为90～200kg/mm~2;(2)具有恒弹性、低后效,装表试验后效已达0.04%;(3)具有良好的加工性能,加工时不开裂、不分层、无毛刺;(4)抗腐蚀能力强,易焊接、不氧化;(5)具有低的弹性
With the development of precision elastic materials and metallurgical technology, most of the special instruments, such as electric meters above 0.5 level, small fan-shaped meters and seismometers in China, are mostly supported by hanging wires. Wire is the key component of the instrument. The quality of silk is dependent on the quality of material and reasonable processing technology. Therefore, the material must meet the following technical requirements: (1) has a high mechanical strength, tensile strength requirements of 90 ~ 200kg / mm ~ 2; (2) has a constant elasticity, low after- The effect has reached 0.04%; (3) has a good processing performance, processing does not crack, no delamination, no glitches; (4) corrosion resistance, easy to weld,