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1.研究背景: 因瓦合金一直用于精密机器。改变含Ni量还能调节线膨胀系数,Fe-42～50%Ni合金一直用于封接用的电子材料。这些铁镍系合金,虽保持高级电子材料的特性,但强度低,即使进行强化处理,抗拉强度也只有80～90公斤/毫米~2,不能充分适用于结构材料(例如为了减少架空输电线的弛度,要采用低膨胀系数的材料代替过去的钢丝)。过去对提高因瓦合金强度所做的一些试验,大多是研究加Ti的时效强化型合金。但加Ti时效硬化合金存在以下缺点:
1. Research Background: Invar alloy has been used for precision machinery. Change the amount of Ni can also adjust the linear expansion coefficient, Fe-42 ~ 50% Ni alloy has been used for sealing electronic materials. These ferro-nickel alloys, while retaining the characteristics of advanced electronic materials, have low strength and tensile strength of only 80 to 90 kg / mm2 even in the case of strengthening treatment, and are not suitable for structural materials (for example, to reduce overhead power lines The sag, the use of low expansion coefficient of material instead of the past steel wire). In the past to improve the strength of Invar alloy made by some of the tests, mostly research and Ti aging strengthening type alloy. However, Ti aging hardened alloys have the following disadvantages: