Nickel-chromium-aluminum-iron alloy with high resistance long-term stability

Abstract

The invention relates to a nickel-chromium-aluminum-iron alloy with high resistance long-term stability. The alloy is characterized by comprising the following components of, by mass, 18%-25% of Cr, 2.0%-5.0% of Al, 1%-5% of Fe, 0.2%-2.0% of Mn, 0.2%-1.5% of Si, 0.2%-2% of Ge, 0.2%-1.5% of rare earth elements and the balance Ni, wherein the grain size of the alloy is less than or equal to 15 microns, the grain size is uniform, and the size pole difference is less than or equal to 5 microns. According to the nickel-chromium-aluminum-iron alloy with the high resistance long-term stability, the resistance long-term stability of the alloy is high, it is verified through the experiment of the applicant that the resistance long-term stability delta R/R of the alloy is less than or equal to 0.2%,the accuracy of the resistance measurement is higher, and the high-precision requirement of a measurement circuit on the measurement in the high-end application field is met.

Description

technical field [0001] The invention belongs to the field of metal materials, in particular to a nickel-chromium-aluminium-iron alloy with high resistance long-term stability. Background technique [0002] In the field of precision resistance alloys, manganese-copper alloys have been dominant for nearly a hundred years, but due to its shortcomings such as low resistivity, large temperature coefficient of secondary resistance, narrow temperature range, poor oxidation resistance and wear resistance, etc. With its wide application. For a long time, all countries in the world have been constantly committed to the development of new alloys. The nickel-chromium-improved resistance alloy is a high-resistance precision resistance alloy developed on the basis of nickel-chromium electrothermal alloys. The typical domestic brand is nickel-chromium-aluminium-iron (6J22 ), nickel-chromium-aluminum-copper (6J23), which has high resistivity, and the resistance temperature system can reach...

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Problems solved by technology

[0003] However, nickel-chromium-improved alloys represented by nickel-chromium-aluminum-iron have the disadvantage that the long-term stability of resistance is not as good as that

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