Copper titanium-copper nickel compensating lead

Abstract

The invention relates to the technical field of temperature-measuring element, in particular to a compensation lead of copper titanic to copper nickel and a preparation process of alloy wires of the compensation lead, wherein, a positive pole conductor of the compensation lead is copper titanic alloy wires, and a weight percentage of the chemical composition is 0.3-1.5 percent of titanic, 0.04-0.06 percent of rare earth, impurities with a percentage no larger than 0.087 percent and excess copper; a negative pole conductor of the compensation lead is copper nickel alloy wires, and a weight percentage of the chemical composition of which is 16-18.5 percent of, 0.3-1.2 percent of manganese, 0.08-0.21 percent of silicon, 0.005-0.015 percent of carbon, 0.04-0.06 percent of rare earth, impurities with a percentage no larger than 0.107 percent and excess nickel. The copper titanic alloy wires and the copper nickel alloy wires have the technical process of raw material preparation, vacuum fusion, hot forging, hot rolling, annealing of hot rolling flan, a process from drawing to annealing with a repetition of three times, and finished product detection and package for leaving factories. Theambient temperature used by the invention is high and wide with a range from -55 DEG C to 300 DEG C, and the invention has the advantages of high precision compensation with a precision level, reduction of raw material cost of 60 percent.

Description

technical field [0001] The invention relates to the technical field of temperature measuring elements, in particular to a copper-titanium-copper-nickel compensation wire. Background technique [0002] The compensation wire is composed of positive and negative conductors, insulation layer and sheath layer with basically the same thermoelectric characteristics as the thermocouple. At present, there are two kinds of nickel-chromium-nickel-silicon (K-type) thermocouple compensation wires commonly used in China, namely KX and KCB, although KX (nickel-chromium-nickel-silicon compensation wire) can be used in a higher temperature range. , but its high resistivity makes the total resistance of the measurement circuit large, which affects the measurement accuracy, and in serious cases affects the resolution of the instrument and cannot be used. At the same time, KX is an extended compensation wire, and its price is the same as that of a thermocouple, which is very uneconomical. KCB...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a new compensation wire for K-type thermocouples, which overcomes the high price of existing nickel-chromium-nickel-silicon compensation wires, poor measurement accuracy or copper-copper-nickel compensation. The wire has the defects of small operating temperature range and large measurement error when the ambient temperature is higher than 150°C.

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