The invention discloses a preparation method for noble / noble composite wire materials, and noble / cheap composite wire materials, wherein the preparation method is simple to operate, and the composite wire materials are controllable in thickness of a composite layer, clean in limiting surface, good in limiting
surface bonding and easy to process subsequently. The preparation process includes that an outer layer of
metal is machined to a round
pipe by
ingot casting, extruding and drawing, and wall thickness is designed according to demand of
product design. The
noble metal round
pipe is placed in a water-cooling mold, core material
metal is placed in a
vacuum induction melting furnace to be melted, core material
molten metal is poured into the water-cooling mode to be fast set, the water-cooling mold is adjusted, and
cooling speed of the core material
molten metal is changed so as to produce a composite bar of clad materials and a core material binding layer (a
transition layer). The composite bar is machined through rotary
swaging, and is carried out with heat treatment and
wire drawing in the middle process to meet product size requirements of customers. The composite wire materials are wrapped evenly by outer layer
metal, and the wrapping layer and the core materials are good in cooperated transformation. The wrapping materials and the core materials are closely combined. The wrapping materials can be used for advanced packing of an
integrated circuit and the like, and part of wrapping materials or all wrapping materials can replace the noble metallic bond composite wire materials.