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本文报道了Fe-Cr-Al-V系高温应变合金的研制工作。用该合金制成的单丝粘贴式温度自补偿应变片,贴在镍基合金GH-30和GH-39试件上,其室温至700℃以上温度区间的热输出数值小于2000βε,能够满足700℃静态强度分析之用,现已广泛应用于喷气发动机涡轮盘及涡轮叶片等高温部件上。文中还分析了合金组元及工艺参数对电阻温度系数的影响,并对电阻稳定性、试件膨胀系数等进行了讨论。
This paper reports the development of Fe-Cr-Al-V high temperature strain alloys. The monofilament bonded temperature self-compensating strain gauges made of the alloy are affixed to the nickel base alloy GH-30 and GH-39 test pieces. The heat output values of the monolayer bonded temperature self-compensating strain gauges from room temperature to 700 ° C. are less than 2000βε, ℃ static strength analysis purposes, is now widely used in jet engine turbine disk and turbine blades and other high temperature components. The effects of alloy elements and process parameters on the temperature coefficient of resistance were also analyzed. Resistance stability, specimen expansion coefficient and so on were also discussed.