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Precise resistive Cu-Mn-Ga-Ge alloy and preparation method thereof

A precision resistor, copper-manganese technology, applied in the manufacture of resistors, resistors, metal/alloy conductors, etc., can solve problems such as easy broken wires, no introduction of average temperature coefficient of resistance temperature coefficient, increase of temperature coefficient of resistance, etc.

Inactive Publication Date: 2009-04-15
SINO PLATINUM METALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the temperature coefficient of resistance is very small, the data in the literature is only the value of the temperature coefficient of resistance at 20 ° C. Like the traditional manganin (Manganin), the resistance-temperature relationship curve of manganese-copper-gallium alloy is approximately parabolic, and the peak value of the parabola Controlled at room temperature, within 10°C intervals on either side of this peak, the temperature coefficient of resistance of manganese-copper alloys is generally less than 10 -5 / °C, but departing from this temperature range, the temperature coefficient of resistance increases sharply. In this document, Vladimirovich did not introduce the temperature coefficient of resistance at other temperature points in the range of -60 to +125°C or the average temperature coefficient of resistance within this range.
In addition, 440~460N / mm 2 The tensile strength of the alloy is too low, and it is easy to break the wire to make a potentiometer with this alloy filament
The above two patents do not introduce the service temperature range of the alloy

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Each component of the alloy is formulated according to the content of 8.6% Mn, 8.5% Ga, 1.0% Ni, and the balance of Cu. It is melted with a high-purity alumina crucible and a high-frequency induction furnace. When melting, the melting chamber is first evacuated to 10 -3 ~10 -5 mmHg, filled with an inert protective gas such as argon, the alloy should be fully degassed in the molten state to increase the density of the ingot, and finally cast in a water-cooled copper mold, and the ingot is prepared by forging, rolling, and drawing to a diameter of less than 0.08 mm of filament, followed by high-purity H 2 After continuous annealing treatment at 400°C under protection, it was treated in methyl silicone oil at 80°C for 5 hours. Finally, its resistivity was determined to be 43μΩ·cm, and the average temperature coefficient of resistance from -60 to +125°C was -2.0×10 -6 / ℃, the tensile strength is 550N / mm 2 , the thermal potential Ecu of copper is -1.2μV / ℃.

Embodiment 2

[0023] Each component of the alloy is formulated according to the content of 8.6% Mn, 7.5% Ga, 2.5% Ge, 2.0% Ni, and the remaining amount of Cu. It is melted in a high-purity alumina crucible and a high-frequency induction furnace. When melting, the melting chamber is first evacuated. to 10 -3 ~10 -5 mmHg, filled with an inert protective gas such as argon, the alloy should be fully degassed in the molten state to increase the density of the ingot, and finally cast in a water-cooled copper mold, and the ingot is prepared by forging, rolling, and drawing to a diameter of less than 0.08 mm of filament, followed by high-purity H 2 After continuous annealing treatment at 600°C under protection, it was treated in methyl silicone oil at 150°C for 50 hours. Finally, the resistivity was determined to be 45μΩ·cm, and the average temperature coefficient of resistance from -60 to +125°C was -5.0×10 -6 / ℃, the tensile strength is 620N / mm 2 , The thermoelectric potential Ecu of copper i...

Embodiment 3

[0025] Each component of the alloy is formulated according to the content of 8.6% Mn, 8.5% Ga, 1.5% Ge, 2.0% Ni, and the remaining amount of Cu. It is melted in a high-purity alumina crucible and a high-frequency induction furnace. When melting, the melting chamber is first evacuated. to 10 -3 ~10 -5 mmHg, filled with an inert protective gas such as argon, the alloy should be fully degassed in the molten state to increase the density of the ingot, and finally cast in a water-cooled copper mold, and the ingot is prepared by forging, rolling, and drawing to a diameter of less than 0.08 mm of filament, followed by high-purity H 2 After continuous annealing treatment at 750°C under protection, it was treated in methyl silicone oil at 300°C for 100 hours. Finally, the resistivity was determined to be 43μΩ·cm, and the average temperature coefficient of resistance from -60 to +125°C was -3.0×10 -6 / ℃, the tensile strength is 610N / mm 2 , the thermal potential Ecu of copper is -1.5...

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Abstract

The present invention is one kind of precise resistive Cu-Mn-Ga-Ge alloy comprising Mn 7-12 wt%, Ga 6-9 wt%, Ge 1-3 wt%, and Cu for the rest. The Cu-Mn-Ga-Ge alloy may contain one or several of Ni, Re, Al, In and other elements in the total content within 3 wt%. The Cu-Mn-Ga-Ge alloy has small average temperature coefficient of resistivity in the temperature range from -60 deg.c to 125 deg.c, small thermal potential to Cu, tensile strength over 600 N / sq mm, stable electric performance and excellent machining performance.

Description

technical field [0001] The invention relates to a manganese-copper series precision resistance alloy, in particular to a manganese-copper series precision resistance alloy made of elements such as copper, manganese, gallium and germanium, which has a wide service temperature range and high tensile strength. technical background [0002] The emergence and development of resistance alloy materials has a history of more than a century. Cu-Ni-Zn alloys and other alloys called "German silver" are the oldest resistance alloy materials known to people. Poor time stability, poor reproducibility, high temperature coefficient of resistance and other reasons have been eliminated. In 1886, Weston developed 70% Cu-30% Mn-Fe and 65% Cu-(25-30)% Mn-Fe-2.5% Ni alloys with a temperature coefficient of resistance close to zero, but the processing performance was too poor to be used. In 1888, the German Institute of Technical Physics developed a Cu-12Mn-4Ni ternary alloy with a temperature co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C9/00C22C9/05C22C1/02C22F1/08H01B1/02H01C17/00
Inventor 黄炳醒万吉高张瑞华雷春明刘雄武海军
Owner SINO PLATINUM METALS CO LTD