Resistor alloy, component produced therefrom and production method therefor

Abstract

The invention relates to a resistor alloy ( 3 ) for an electrical resistor, in particular for a low-resistance current-measuring resistor, having a copper constituent, a manganese constituent and a nickel constituent. According to the invention, the manganese constituent has a mass fraction of 23% to 28%, while the nickel constituent has a mass fraction of 9% to 13%. The mass fractions of the alloy constituents are adjusted to one another in such a manner that, compared to copper, the resistor alloy ( 3 ) has a low thermal electromotive force at 20° C. of less than ±1 μν/K. The invention furthermore comprises a component made from such a resistor alloy and a production method therefor.

1 - 10 . (canceled) 
     
     
         11 . A resistance alloy for an electrical resistor comprising:
 a) a copper constituent,   b) a manganese constituent with a mass fraction of from 23% to 28%, and   c) a nickel constituent with a mass fraction of from 9% to 13%,   d) wherein the mass fractions of the manganese constituent and of the nickel constituent are effective to provide the resistance alloy with a low thermal electromotive force against copper at 20° C. of less than ±1 μV/K.   
     
     
         12 . The resistance alloy according to  claim 11 , further comprising a tin constituent with a mass fraction of up to 3% for improving a temperature stability of a specific electrical resistance of the resistance alloy. 
     
     
         13 . The resistance alloy according to  claim 11 , further comprising a silicon constituent with a mass fraction of up to 1% for improving a temperature stability of a specific electrical resistance of the resistance alloy. 
     
     
         14 . The resistance alloy according to  claim 11 , further comprising a magnesium constituent with a mass fraction of up to 0.3% for avoiding embrittlement as a result of precipitation hardening effects. 
     
     
         15 . The resistance alloy according to  claim 11 , wherein a mass fraction of the copper constituent is substantially 65% and the mass fraction of the nickel constituent is substantially 10% and the mass fraction of the manganese constituent is substantially 25%. 
     
     
         16 . The resistance alloy according to  claim 12 , wherein the mass fraction of the nickel constituent is substantially 10% and the mass fraction of the manganese constituent is substantially 25% and the mass fraction of the tin constituent is up to 1% and a mass fraction of the copper constituent substantially accounts for the remainder. 
     
     
         17 . The resistance alloy according to  claim 11 , wherein a mass fraction of the copper constituent is substantially 62% and the mass fraction of the nickel constituent is substantially 11% and the mass fraction of the manganese constituent is substantially 27%. 
     
     
         18 . The resistance alloy according to  claim 12 , wherein the mass fraction of the nickel constituent is substantially 11% and the mass fraction of the manganese constituent is substantially 27% and the mass fraction of the tin constituent is up to 1% and a mass fraction of the copper constituent substantially accounts for a remainder thereof. 
     
     
         19 . The resistance alloy according to  claim 11 , further comprising a specific electrical resistance which is greater than 0.5 (Ω·mm 2 )/m and less than 2.0 (Ω·mm 2 )/m. 
     
     
         20 . The resistance alloy according to  claim 11 , further comprising a specific electrical resistance having a high stability over time with a relative change of less than ±0.5% within a period of 3000 hours. 
     
     
         21 . The resistance alloy according to  claim 11 , further comprising a low thermal electromotive force against copper at 20° C. of less than ±0.5 μV/K. 
     
     
         22 . The resistance alloy according to  claim 11 , further comprising a specific electrical resistance having a low temperature coefficient of less than ±50·10 −6  K −1  in a temperature range of from +20° C. to +60° C. 
     
     
         23 . The resistance alloy according to  claim 11 , further comprising a resistance/temperature curve which shows relative resistance change in dependence on temperature, the resistance/temperature curve having a second zero-crossing which occurs at a temperature of more than +20° C. and at less than +110° C. 
     
     
         24 . The resistance alloy according to  claim 11 , further comprising
 a) a mechanical tensile strength of at least 500 MPa, and   b) a yield strength of at least 150 MPa, and   c) a breaking elongation of at least 30%.   
     
     
         25 . The resistance alloy according to  claim 11 , wherein
 a) the resistance alloy is capable of being soldered, and   b) the resistance alloy is so readily workable that it achieves a logarithmic deformation degree of at least φ=−4.6 in a case of wire drawing.   
     
     
         26 . The resistance alloy according to  claim 11 , being provided in a form selected from the group consisting of a wire, a ribbon, a sheet, a rod, a tube and a foil. 
     
     
         27 . A resistor having a resistor element made from a resistance alloy according to  claim 11 . 
     
     
         28 . A production method for producing a resistance alloy for an electrical resistor comprising the following steps:
 a) providing a copper constituent,   b) providing a manganese constituent with a mass fraction of from 23% to 28% and   c) providing a nickel constituent with a mass fraction of from 9% to 13% are alloyed to form the resistance alloy, and   d) combining the copper constituent, the manganese constituent and the nickel constituent to provide the resistance alloy,   e) wherein the mass fractions of the manganese constituent and of the nickel constituent are so chosen that the resistance alloy has a low thermal electromotive force against copper at 20° C. of less than ±1 μV/K.   
     
     
         29 . The production method according to  claim 28 , wherein the resistance alloy is subjected to an artificial thermal ageing process, wherein the resistance alloy is heated from a starting temperature to an ageing temperature. 
     
     
         30 . The production method according to  claim 28 , wherein the artificial thermal ageing process further comprises repeatedly periodically heating the resistance alloy to the ageing temperature and cooling to the starting temperature again. 
     
     
         31 . The production method according to  claim 30 , wherein the ageing temperature is greater than +80° C. 
     
     
         32 . The production method according to  claim 31 , wherein the starting temperature is less than +30° C.