Method of producing an oxygen-free copper wire material by a continuous cast-rolling method using a rotational movable mold

Abstract

A method of producing an oxygen-free copper wire material, containing: continuously guiding a molten copper obtained by melting electric copper, into a tundish through a conduit; injecting the molten copper in the tundish, into a rotational movable mold; cooling and solidifying the molten copper, to form an ingot; and continuously drawing the ingot out of the mold, followed by continuous rolling; the method further containing: allowing the molten copper in the conduit to react with a solid reducing agent, under blowing an inert gas thereinto; allowing the molten copper in the tundish to react with a solid reducing agent, under blowing an inert gas thereinto; and adding a phosphorus compound to the molten copper, so that the phosphorus content in the ingot would be from 1 to 10 ppm; and controlling the temperature of the molten copper in the tundish from 1,085 to 1,100° C.

1 - 5 . (canceled) 
     
     
         5 . A method of producing an oxygen-free copper wire material, comprising the steps of:
 continuously guiding a molten copper obtained by melting copper material;   allowing the molten copper to react with a solid reducing agent, and blowing an inert gas into the molten copper;   adding a phosphorus compound to the molten copper;   controlling the temperature of the molten copper in the range from 1,085 to 1,100° C.;   injecting the molten copper into a rotational movable mold;   cooling and solidifying the molten copper to form an ingot whose phosphorus content is in the range from 1 to 10 ppm; and   continuously drawing the ingot out of the mold, followed by subjecting the drawn ingot to continuous rolling, to form a rod.   
     
     
         6 . The method of producing an oxygen-free copper wire material according to  claim 5 , wherein the molten copper is guided into a tundish through a conduit by the step continuously guiding the molten copper obtained by melting copper material. 
     
     
         7 . The method of producing an oxygen-free copper wire material according to  claim 6 , wherein the step of allowing the molten copper to react with a solid reducing agent, and blowing an inert gas into the molten copper, is done in the tundish and/or conduit. 
     
     
         8 . The method of producing an oxygen-free copper wire material according to  claim 5 , wherein the phosphorus compound is added in the step of adding a phosphorus compound to the molten copper, so as to form the ingot whose phosphorus content is in the range from 1 to 10 ppm. 
     
     
         9 . The method of producing an oxygen-free copper wire material according to  claim 5 , wherein the phosphorus compound is added in the step of adding a phosphorus compound to the molten copper, so as to form the ingot whose phosphorus content is in the range from 2 to 8 ppm. 
     
     
         10 . The method of producing an oxygen-free copper wire material according to  claim 5 , wherein the temperature of the molten copper is controlled in the range from 1,085 to 1,095° C. 
     
     
         11 . The method of producing an oxygen-free copper wire material according to  claim 5 , wherein said rotational movable mold is belt and wheel type. 
     
     
         12 . The method of producing an oxygen-free copper wire material according to  claim 5 , wherein said rotational movable mold is twin belts type. 
     
     
         13 . The method of producing an oxygen-free copper wire material according to  claim 5 , wherein the step of allowing the molten copper to react with a solid reducing agent, is the step that charcoal is allowed to float on the surface of the molten copper. 
     
     
         14 . The method of producing an oxygen-free copper wire material according to  claim 5 , wherein the step of blowing an inert gas into the molten copper is a step that nitrogen gas or argon gas is forcibly blown from the bottom of the molten copper. 
     
     
         15 . The method of producing an oxygen-free copper wire material according to  claim 5 , further comprising
 the step of applying the rod to cold-working.   
     
     
         16 . An oxygen-free copper wire material produced by the method comprising the steps of:
 continuously guiding a molten copper obtained by melting copper material;   allowing the molten copper to react with a solid reducing agent, and blowing an inert gas into the molten copper;   adding a phosphorus compound to the molten copper;   controlling the temperature of the molten copper in the range from 1,085 to 1,100° C.;   injecting the molten copper into a rotational movable mold;   cooling and solidifying the molten copper to form an ingot whose phosphorus content is in the range from 1 to 10 ppm; and   continuously drawing the ingot out of the mold, followed by subjecting the drawn ingot to continuous rolling, to form a rod.   
     
     
         17 . The oxygen-free copper wire material according to  claim 16 , whose oxygen content is in the range 6 ppm or less. 
     
     
         18 . The oxygen-free copper wire material according to  claim 16 , whose hydrogen content is in the range 0.5 ppm or less. 
     
     
         19 . An oxygen-free copper wire material produced by the method comprising the steps of:
 continuously guiding a molten copper obtained by melting copper material;   allowing the molten copper to react with a solid reducing agent, and blowing an inert gas into the molten copper;   adding a phosphorus compound to the molten copper;   controlling the temperature of the molten copper in the range from 1,085 to 1,100° C.;   injecting the molten copper into a rotational movable mold;   cooling and solidifying the molten copper to form an ingot whose phosphorus content is in the range from 1 to 10 ppm;   continuously drawing the ingot out of the mold, followed by subjecting the drawn ingot to continuous rolling, to form a rod; and   the step of applying the rod to cold-working.   
     
     
         20 . The oxygen-free copper wire material according to  claim 19 , whose electric conductivity is 98% or more.