The invention relates to a method for preparing a
nickel-
chromium multi-component high-resistance electrothermal
alloy and particularly relates to a method for preparing the
nickel-
chromium multi-component high-resistance electrothermal
alloy by melting in combination with
powder metallurgy. The preparation method comprises the following steps of proportioning raw materials, melting, crushing, ball-milling, carrying out
spark plasma sintering, carrying out homogenizing annealing and
isothermal forging, hot-rolling steel wire rods, carrying
out stress relief annealing, rinsing and carrying out multi-pass drawing and the like. Due to the adoption of the preparation method combining melting and
powder metallurgy, the composition segregation caused by the large difference in the
melting point, density and
mass ratio of each component in a conventional
smelting method can be effectively avoided, uniform distribution of each component is achieved, the microstructures of the
alloy are effectively improved in combination with subsequent homogenizing annealing,
isothermal forging, hot rolling of steel wire rods and the like and the mechanical properties, application temperature and service life are improved.